Performance Management |
Mar. 01, 2026 |
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| California Municipal Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg California Municipal Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 5.67% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.07%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg Municipal Bond Index is the Fund's primary broad-based securities market index. The Bloomberg California Municipal Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Core Fixed Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.75% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.80%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Core Plus Bond Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.36% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.07%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Diversified Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (June 12, 2017), the performance shown in the table for Class R-6 shares is that of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses of Class R-6 shares. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.39% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.02%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Diversified International Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (March 1, 2019), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.41% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.11%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Equity Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (October 9, 2018), the performance shown in the table for Class J shares is that of the Fund’s Class A shares, adjusted to reflect the fees and expenses of Class J shares. However, where the adjustment for fees and expenses results in performance for Class J shares that is higher than the historical performance of the Class A shares, the historical performance of the Class A shares is used without respect to sales charges. These adjustments result in performance for such periods that is no higher than the historical performance of Class A shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 1000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.59% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.44%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Russell 1000 Index is the Fund's primary broad-based securities market index. The Russell 1000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Finisterre Emerging Markets Total Return Bond Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Life of Fund returns are measured from the date the Fund’s shares were first sold (July 11, 2016).
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The JPM EMBI Equal Weighted Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. Prior to March 1, 2026, the Fund's secondary index was the Finisterre Emerging Markets Total Return Bond Blended Index. Performance of each component of the blended index is also shown. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 9.76% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (11.00%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg Global Aggregate Index is the Fund's primary broad-based securities market index. Effective March 1, 2026, the Fund changed its secondary index to the JPM EMBI Equal Weighted Index because it more closely aligns with the Fund's investment approach. The JPM EMBI Equal Weighted Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. Prior to March 1, 2026, the Fund's secondary index was the Finisterre Emerging Markets Total Return Bond Blended Index. Performance of each component of the blended index is also shown. The weightings for the Finisterre Emerging Markets Total Return Bond Blended Index are: 33.33% JPM GBI-EM Global Diversified Index; 33.33% JPM EMBI Global Diversified Index; and 33.33% JPM CEMBI Broad Diversified Index.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Global Emerging Markets Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares. During 2019, the Fund experienced a significant one-time gain of approximately $0.11/share as the result of a settlement in a litigation proceeding. If such gain had not been recognized, the total return amounts expressed herein would have been lower.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.56% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (24.38%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table Footnotes | During 2019, the Fund experienced a significant one-time gain of approximately $0.11 per share as a result of a settlement in a litigation proceeding. If such gain had not been recognized, the total return amounts shown for periods that include the year ended December 31, 2019 would have been lower. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Global Real Estate Securities Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Classes R-3 and R-5 shares (March 1, 2016), the performance shown in the table for these newer classes is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The FTSE EPRA/NAREIT Developed Index NTR is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.65% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.65%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The MSCI ACWI NR USD Index is the Fund's primary broad-based securities market index. The FTSE EPRA/NAREIT Developed Index NTR is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Government & High Quality Bond Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg US Agency Fixed Rate MBS Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.52% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.49%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Sep. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The Bloomberg US Agency Fixed Rate MBS Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Government Money Market Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (December 12, 2022), the performance shown in the table for Class R-6 shares is that of the Fund’s Institutional Class shares. Life of Fund returns are measured from the date the Fund’s shares were first sold (December 20, 2017).
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg U.S. Treasury Bellwethers 3 Month Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | none | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The Bloomberg US Aggregate Bond Index is the Fund's primary broad-based securities market index. The Bloomberg U.S. Treasury Bellwethers 3 Month Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| High Yield Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class A shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class A shares, the historical performance of the Class A shares is used (without respect to sales charges, which are not applicable to Class R-6). These adjustments result in performance for such periods that is no higher than the historical performance of the Class A shares.
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|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | . Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg U.S. Corporate High Yield 2% Issuer Capped Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.73% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (12.01%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Bond Index is the Fund's primary broad-based securities market index. The Bloomberg U.S. Corporate High Yield 2% Issuer Capped Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Inflation Protection Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Prior to March 1, 2026, the strategy of the Fund differed from its current strategy. Accordingly, performance of the Fund for periods prior to March 1, 2026, may not be representative of the performance the Fund would have achieved had the Fund been following its current strategy.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg US Treasury TIPS Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.72% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.33%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The Bloomberg US Treasury TIPS Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| International Bond Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | No performance information is shown because the Fund has not yet had a calendar year of performance. The performance is benchmarked against the Bloomberg Global Aggregate ex USD Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance One Year or Less [Text] | No performance information is shown because the Fund has not yet had a calendar year of performance. | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| International Equity Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses of Class R-6 shares. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.05% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.85%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| LargeCap Growth Fund I | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 1000 Growth Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 27.72% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.61%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Russell 1000 Index is the Fund's primary broad-based securities market index. The Russell 1000 Growth Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| LargeCap S&P 500 Index Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.38% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (19.67%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| LargeCap Value Fund III | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 1000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 16.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (26.91%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Russell 1000 Index is the Fund's primary broad-based securities market index. The Russell 1000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| MidCap Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell MidCap Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 24.72% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (23.89%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The Russell MidCap Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| MidCap S&P 400 Index Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P MidCap 400 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
|
|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 24.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (29.79%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P MidCap 400 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| MidCap Value Fund I | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Classes A and R-6 shares (April 2, 2019), the performance shown in the table for these newer classes is that of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses of the newer class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell MidCap Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.14% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (29.46%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The Russell MidCap Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Money Market Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg U.S. Treasury Bellwethers 3 Month Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.28% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | none | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The Bloomberg U.S. Treasury Bellwethers 3 Month Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Overseas Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The MSCI EAFE Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 23.03% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.40%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The MSCI EAFE Index is the Fund's primary broad-based securities market index. The MSCI EAFE Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal Capital Appreciation Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.69% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (19.46%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Strategic Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date Retirement Income Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.31% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (8.45%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date Retirement Income Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2015 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2015 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 11.02% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (9.54%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2015 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2020 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2020 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 12.29% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (11.66%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2020 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2025 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2025 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 14.07% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (13.80%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2025 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2030 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2030 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.42% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (15.80%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2030 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2035 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2035 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.13% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.37%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2035 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2040 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2040 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.96% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (18.87%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2040 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2045 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2045 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.90% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (19.94%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2045 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2050 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2050 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.45% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (20.88%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2050 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2055 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2055 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.93% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.46%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2055 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2060 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2060 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.12% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.80%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2060 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2065 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Life of Fund returns are measured from the date the Fund’s shares were first sold (September 6, 2017).
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.50% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.97%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime 2070 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Life of Fund returns are measured from the date the Fund’s shares were first sold (March 1, 2023).
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund's performance compares with returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 9.57% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2025 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.69%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Dec. 31, 2024 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund's performance compares with returns of an index of funds with similar investment objectives.
|
|||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date Retirement Income Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.43% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (8.44%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date Retirement Income Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
|||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2015 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2015 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 9.79% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (8.93%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2015 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
|||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2020 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2020 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
|
|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 11.16% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (10.35%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2020 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
|||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2025 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2025 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 12.56% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (12.50%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The S&P Target Date 2025 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance. | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2030 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2030 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 14.20% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (14.39%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2030 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2035 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2035 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.37% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (16.18%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2035 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2040 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2040 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 16.41% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.67%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2040 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2045 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table for is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2045 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.28% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (18.83%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2045 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2050 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2050 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.00% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (19.78%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2050 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2055 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2055 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.35% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (20.52%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2055 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2060 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table is that of the Fund’s Institutional Class shares, adjusted to reflect the respective fees and expenses of each class. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2060 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.71% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (20.90%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2060 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2065 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Life of Fund returns are measured from the date the Fund’s shares were first sold (September 6, 2017). For periods prior to the inception date of Class J shares (March 1, 2018), the performance shown in the table for Class J shares is that of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses of Class J shares. These adjustments result in performance for such periods that is no higher than the historical performance of the Institutional Class shares, which were first sold on September 6, 2017. During 2018, Class R-6 experienced a one-time loss of approximately $0.33 per share as a result of a large redemption. If such loss had not been recognized, the total return amounts expressed herein would have been higher. During May of 2019, Class R-6 experienced a one-time gain of approximately $0.35 per share as a result of a reimbursement by PGI, the investment advisor. If such gain had not been recognized, the total return amounts expressed herein would have been lower.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.12% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.10%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Principal LifeTime Hybrid 2070 Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. Life of Fund returns are measured from the date the Fund’s shares were first sold (March 1, 2023).
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 9.93% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2025 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.56%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P Target Date 2065+ Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Real Estate Securities Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The FTSE NAREIT All Equity REIT Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.29% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2019 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.76%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The FTSE NAREIT All Equity REIT Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Strategic Asset Management Balanced Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The SAM Balanced Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 13.09% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (15.43%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. Effective March 1, 2026, the Fund changed its primary broad-based securities market index to the MSCI ACWI Index NTR because it more closely aligns with the Fund's investment approach. Prior to March 1, 2026, the Fund's primary broad-based securities market index was the Russell 3000 Index. The SAM Balanced Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. Performance of each component of the blended index is also shown. Effective as of March 1, 2026, the Fund changed the weightings of the SAM Balanced Blended Index to the following because such weightings more closely align with the Fund's investment approach: 60% MSCI ACWI Index NTR and 40% Bloomberg US Aggregate Index. Prior to March 1, 2026, the components and weightings of the SAM Balanced Blended Index were as follows: 45% Russell 3000 Index, 40% Bloomberg US Aggregate Index, and 15% MSCI EAFE Index NTR. The blended index returns reflect the allocations described in the preceding sentences and are as of December 31, 2025.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Strategic Asset Management Conservative Balanced Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The SAM Conservative Balanced Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 10.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (11.74%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The SAM Conservative Balanced Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. Performance of each component of the blended index is also shown. Effective as of March 1, 2026, the Fund changed the weightings of the SAM Conservative Balanced Blended Index to the following because such weightings more closely align with the Fund's investment approach: 60% Bloomberg US Aggregate Index and 40% MSCI ACWI Index NTR. Prior to March 1, 2026, the components and weightings of the SAM Conservative Balanced Blended Index were as follows: 60% Bloomberg US Aggregate Index, 30% Russell 3000 Index, and 10% MSCI EAFE Index NTR. The blended index returns reflect the allocations described in the preceding sentences and are as of December 31, 2025.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Strategic Asset Management Conservative Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The SAM Conservative Growth Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.98% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (19.15%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. Effective March 1, 2026, the Fund changed its primary broad-based securities market index to the MSCI ACWI Index NTR because it more closely aligns with the Fund's investment approach. Prior to March 1, 2026, the Fund's primary broad-based securities market index was the Russell 3000 Index. The SAM Conservative Growth Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. Performance of each component of the blended index is also shown. Effective as of March 1, 2026, the Fund changed the weightings of the SAM Conservative Growth Blended Index to the following because such weightings more closely align with the Fund's investment approach: 80% MSCI ACWI Index NTR and 20% Bloomberg US Aggregate Index. Prior to March 1, 2026, the components and weightings of the SAM Conservative Growth Blended Index were as follows: 60% Russell 3000 Index, 20% Bloomberg US Aggregate Index, and 20% MSCI EAFE Index NTR. The blended index returns reflect the allocations described in the preceding sentences and are as of December 31, 2025.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Strategic Asset Management Flexible Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The SAM Flexible Income Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.69% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (8.81%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The SAM Flexible Income Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. Performance of each component of the blended index is also shown. Effective as of March 1, 2026, the Fund changed the weightings of the SAM Flexible Income Blended Index to the following because such weightings more closely align with the Fund's investment approach: 75% Bloomberg US Aggregate Index and 25% MSCI ACWI Index NTR. Prior to March 1, 2026, the components and weightings of the SAM Flexible Income Blended Index were as follows: 75% Bloomberg US Aggregate Index, 20% Russell 3000 Index, and 5% MSCI EAFE Index NTR. The blended index returns reflect the allocations described in the preceding sentences and are as of December 31, 2025.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Strategic Asset Management Strategic Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The SAM Strategic Growth Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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|||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.17% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.15%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. Effective March 1, 2026, the Fund changed its primary broad-based securities market index to the MSCI ACWI Index NTR because it more closely aligns with the Fund's investment approach. Prior to March 1, 2026, the Fund's primary broad-based securities market index was the Russell 3000 Index. The SAM Strategic Growth Blended Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with returns of indices of funds with similar investment objectives. Performance of each component of the blended index is also shown. Effective as of March 1, 2026, the Fund changed the weightings of the SAM Strategic Growth Blended Index to the following because such weightings more closely align with the Fund's investment approach: 95% MSCI ACWI Index NTR and 5% Bloomberg US Aggregate Index. Prior to March 1, 2026, the weightings for SAM Strategic Growth Blended Index were as follows: 70% Russell 3000 Index, 25% MSCI EAFE Index NTR, and 5% Bloomberg US Aggregate Index. The blended index returns reflect the allocations described in the preceding sentences and are as of December 31, 2025.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Short-Term Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Bloomberg Credit 1-3 Year Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 3.37% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (2.48%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Bloomberg US Aggregate Index is the Fund's primary broad-based securities market index. The Bloomberg Credit 1-3 Year Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| SmallCap Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 2000 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 28.39% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.54%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The Russell 2000 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
|
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| SmallCap Growth Fund I | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
|
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 2000 Growth Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 33.84% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.08%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The Russell 2000 Growth Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| SmallCap S&P 600 Index Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance. For periods prior to the inception date of Class R-6 shares (November 22, 2016), the performance shown in the table for Class R-6 shares is that of the Fund’s Class R-3 shares, adjusted to reflect the fees and expenses of Class R-6 shares. However, where the adjustment for fees and expenses results in performance for Class R-6 shares that is higher than the historical performance of the Class R-3 shares, the historical performance of the Class R-3 shares is used. These adjustments result in performance for such periods that is no higher than the historical performance of the Class R-3 shares.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The S&P SmallCap 600 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 31.18% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (32.65%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The S&P 1500 Index is the Fund's primary broad-based securities market index. The S&P SmallCap 600 Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| SmallCap Value Fund II | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Institutional Class shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Performance Additional Market Index [Text] | The Russell 2000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 31.34% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (35.49%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only and would be different for the other share classes. The Russell 3000 Index is the Fund's primary broad-based securities market index. The Russell 2000 Value Index is included as an additional index for the Fund as it shows how the Fund’s performance compares with the returns of an index of funds with similar investment objectives.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||
| Tax-Exempt Bond Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The following information provides some indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information at www.principalam.com/mutualfundperformance. The bar chart shows the investment returns of the Fund’s Class A shares for each full calendar year of operations for 10 years (or, if shorter, the life of the Fund). These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. The table shows for the last one, five, and ten calendar year periods (or, if shorter, the life of the Fund), how the Fund’s average annual total returns compare with those of one or more broad measures of market performance.
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| Performance Past Does Not Indicate Future [Text] | Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following information provides some indication of the risks of investing in the Fund. | |||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | These annual returns do not reflect sales charges on Class A shares; if they did, results would be lower. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Total Returns as of December 31 | |||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] |
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| Highest Quarterly Return, Label [Optional Text] | Highest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.34% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest return for a quarter during the period of the bar chart above: | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.11%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Performance Table Heading | Average Annual Total ReturnsFor the periods ended December 31, 2025 | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | |||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Class A shares only and would be different for the other share classes. | |||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses, or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and would be different for the other share classes.
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| Performance Availability Website Address [Text] | www.principalam.com/mutualfundperformance | |||||||||||||||||||||||||||