S000001151 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 257 Months Ended | 270 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
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| Bloomberg U.S. Aggregate Bond Index | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% | ||||||
| ICE BofA 1–Year U.S. Treasury Index | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 4.15% | 2.48% | 2.03% | ||||||
| CLASS I | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 5.89% | 2.75% | 2.19% | ||||||
| Performance Inception Date | Jul. 31, 2004 | ||||||||
| CLASS M | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 5.47% | 2.54% | 2.01% | ||||||
| Performance Inception Date | Jun. 30, 2003 | ||||||||
| CLASS M | After Taxes on Distributions | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 3.71% | 1.32% | 1.08% | ||||||
| Performance Inception Date | Jun. 30, 2003 | ||||||||
| CLASS M | After Taxes on Distributions and Sales | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 3.22% | 1.41% | [1] | 1.13% | [1] | ||||
| Performance Inception Date | Jun. 30, 2003 | ||||||||
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