Class K [Member] Average Annual Total Returns - Class K [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
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| 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% | ||
| Customized Reference Benchmark (Reflects no deduction for fees, expenses or taxes) | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 4.07% | 1.03% | ||
| Class K Shares | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 2.76% | 0.95% | 2.19% | ||
| Class K Shares | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 2.63% | 0.82% | 1.98% | ||
| Class K Shares | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 3.08% | 1.30% | 2.21% | ||
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