v3.26.3
Class K [Member] Average Annual Total Returns - Class K
12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg Municipal Bond Index (Reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 4.25% 0.80% 2.34%
California Customized Reference Benchmark (Reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 4.02% 0.64%
Class K      
Prospectus [Line Items]      
Average Annual Return, Percent 3.12% 1.58% 2.46%
Class K | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 2.98% 1.46% 2.31%
Class K | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 3.21% 1.76% 2.43%
[1] The California Customized Reference Benchmark commenced in September 2016 and therefore the California Customized Reference Benchmark does not have a return for the 10-year period.