v3.25.4
Fees and Expenses
Dec. 30, 2025
Capital Group California Core Municipal Fund | Capital Group California Core 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 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)
Shareholder Fees [Table]
   

Shareholder fees

(fees paid directly from your investment)

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)  none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed)  none
Maximum sales charge (load) imposed on reinvested dividends  none
Redemption or exchange fees  none
Operating Expenses Caption [Optional Text] Annual fund operating expenses (expenses that you pay each year as a percentage of the net asset value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual fund operating expenses

(expenses that you pay each year as a percentage of the net asset value of your investment)

Management fees 0.25%
Distribution and/or service (12b-1) fees none
Other expenses 0.02
Total annual fund operating expenses 0.27
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.

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold 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.

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, With Redemption [Table]
       
1 year 3 years 5 years 10 years
$28 $87 $152 $343
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 investment results. During the most recent fiscal year, the fund’s portfolio turnover rate was 36% of the average value of its portfolio.

Portfolio Turnover, Rate 36.00%
Capital Group California Short-Term Municipal Fund | Capital Group California Short-Term 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 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)
Shareholder Fees [Table]
   

Shareholder fees

(fees paid directly from your investment)

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)  none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed)  none
Maximum sales charge (load) imposed on reinvested dividends  none
Redemption or exchange fees  none
Operating Expenses Caption [Optional Text] Annual fund operating expenses (expenses that you pay each year as a percentage of the net asset value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual fund operating expenses

(expenses that you pay each year as a percentage of the net asset value of your investment)

Management fees 0.25%
Distribution and/or service (12b-1) fees none
Other expenses 0.06
Total annual fund operating expenses 0.31
Expense reimbursement* 0.01
Total annual fund operating expenses after expense reimbursement 0.30

* The investment adviser is currently reimbursing a portion of other expenses. This reimbursement will be in effect through at least January 1, 2027. The adviser may elect at its discretion to extend, modify or terminate the reimbursement at that time.

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.

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold 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 example reflects the expense reimbursement described above through the expiration date of such reimbursement and total annual fund operating expenses thereafter.

Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, With Redemption [Table]
       
1 year 3 years 5 years 10 years
$31 $99 $173 $392
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 investment results. During the most recent fiscal year, the fund’s portfolio turnover rate was 46% of the average value of its portfolio.

Portfolio Turnover, Rate 46.00%