Fees and Expenses |
Mar. 01, 2026
USD ($)
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|---|---|
| California Municipal Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class C shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 52.2% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 52.20% |
| Core Fixed Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 13.4% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 13.40% |
| Core Plus Bond Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 165.0% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 165.00% |
| Diversified Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class C shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 92.9% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 92.90% |
| Diversified International Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 38.2% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 38.20% |
| Equity Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 16.7% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 16.70% |
| Finisterre Emerging Markets Total Return Bond Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 125.7% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 125.70% |
| Global Emerging Markets Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 32.3% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 32.30% |
| Global Real Estate Securities Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 22.1% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 22.10% |
| Government & High Quality Bond Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 268.0% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 268.00% |
| Government Money Market Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| High Yield Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class C shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 40.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 40.30% |
| Inflation Protection Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expenses Restated to Reflect Current [Text] | Fees have been restated to reflect current fees. |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 155.4% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 155.40% |
| International Bond Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Other Expenses, New Fund, Based on Estimates [Text] | Based on estimated expenses for the current fiscal year. |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. This Fund is new and does not have a portfolio turnover rate to disclose.
|
| International Equity Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 96.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 96.30% |
| LargeCap Growth Fund I | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 34.7% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 34.70% |
| LargeCap S&P 500 Index Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 4.2% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 4.20% |
| LargeCap Value Fund III | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expenses Restated to Reflect Current [Text] | Fees have been restated to reflect current fees. |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 60.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 60.50% |
| MidCap Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 13.7% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 13.70% |
| MidCap S&P 400 Index Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 16.2% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 16.20% |
| MidCap Value Fund I | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 79.6% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 79.60% |
| Money Market Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes A and J shares, you would pay the following expenses if you did not redeem your shares: |
| Overseas Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 77.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 77.50% |
| Principal Capital Appreciation Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 55.8% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 55.80% |
| Principal LifeTime Strategic Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 24.4% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 24.40% |
| Principal LifeTime 2015 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment): |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 27.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 27.30% |
| Principal LifeTime 2020 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 25.6% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 25.60% |
| Principal LifeTime 2025 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 30.0% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 30.00% |
| Principal LifeTime 2030 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 32.1% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 32.10% |
| Principal LifeTime 2035 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 37.2% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 37.20% |
| Principal LifeTime 2040 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 38.9% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 38.90% |
| Principal LifeTime 2045 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 44.6% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 44.60% |
| Principal LifeTime 2050 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 44.7% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 44.70% |
| Principal LifeTime 2055 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 48.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 48.30% |
| Principal LifeTime 2060 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 47.4% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 47.40% |
| Principal LifeTime 2065 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 48.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 48.30% |
| Principal LifeTime 2070 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 47.9% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 47.90% |
| Principal LifeTime Hybrid Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 27.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 27.30% |
| Principal LifeTime Hybrid 2015 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 19.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 19.50% |
| Principal LifeTime Hybrid 2020 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 28.1% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 28.10% |
| Principal LifeTime Hybrid 2025 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 24.4% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 24.40% |
| Principal LifeTime Hybrid 2030 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 25.4% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 25.40% |
| Principal LifeTime Hybrid 2035 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 28.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 28.30% |
| Principal LifeTime Hybrid 2040 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 29.8% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 29.80% |
| Principal LifeTime Hybrid 2045 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 35.2% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 35.20% |
| Principal LifeTime Hybrid 2050 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 33.7% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 33.70% |
| Principal LifeTime Hybrid 2055 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 33.7% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 33.70% |
| Principal LifeTime Hybrid 2060 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 33.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 33.50% |
| Principal LifeTime Hybrid 2065 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 34.6% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 34.60% |
| Principal LifeTime Hybrid 2070 Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 49.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 49.50% |
| Real Estate Securities Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 18.5% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 18.50% |
| Strategic Asset Management Balanced Portfolio | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying funds' performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 44.7% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 44.70% |
| Strategic Asset Management Conservative Balanced Portfolio | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 32.3% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 32.30% |
| Strategic Asset Management Conservative Growth Portfolio | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 41.9% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 41.90% |
| Strategic Asset Management Flexible Income Portfolio | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 23.9% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 23.90% |
| Strategic Asset Management Strategic Growth Portfolio | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund and each underlying fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s and the underlying fund's performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 44.8% of the average value of its portfolio. |
| Portfolio Turnover, Rate | 44.80% |
| Short-Term Income Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expenses Restated to Reflect Current [Text] | Fees have been restated to reflect current fees. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Classes C and J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 42.3% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 42.30% |
| SmallCap Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 50,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 31.4% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 31.40% |
| SmallCap Growth Fund I | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 70.1% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 70.10% |
| SmallCap S&P 600 Index Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 35.9% of the average value of its portfolio.
|
| Portfolio Turnover, Rate | 35.90% |
| SmallCap Value Fund II | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. If you purchase Institutional Class or Class R-6 shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
|
| Expenses Restated to Reflect Current [Text] | Fees have been restated to reflect current fees. |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class J shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 89.9% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 89.90% |
| Tax-Exempt Bond Fund | |
| Prospectus [Line Items] | |
| Expense Heading [Optional Text] | Fees and Expenses of the Fund |
| Expense Narrative [Text Block] | This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. More information about these and other discounts is available from your financial intermediary and in “Choosing a Share Class and The Costs of Investing” beginning on page 398 of the Fund’s Prospectus, Appendix B to the Prospectus titled “Intermediary-Specific Sales Charge Waivers and Reductions,” and “Multiple Class Structure” beginning on page 69 of the Fund’s Statement of Additional Information. If you purchase Institutional Class shares through certain programs offered by certain financial intermediaries, you may be required to pay a commission and/or other forms of compensation to the broker, or to your Financial Professional or other financial intermediary.
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| Expense Breakpoint Discounts [Text] | You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A Shares of Principal Funds, Inc. |
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 |
| Shareholder Fees Caption [Optional Text] | Shareholder Fees (fees paid directly from your investment) |
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Expense Example [Heading] | Example |
| Expense Example Narrative [Text Block] | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. |
| Expense Example by, Year, Caption [Text] | The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example assumes conversion of the Class C shares to Class A shares after the eighth year. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account any applicable contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Expense Example, No Redemption, By Year, Caption [Text] | With respect to Class C shares, you would pay the following expenses if you did not redeem your shares (all other classes would be the same as in the above example): |
| Portfolio Turnover [Heading] | Portfolio Turnover |
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 53.2% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 53.20% |