Fixed Income SHares Series C Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
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| Bloomberg U.S. Aggregate Index (reflects no deductions for fees, expenses or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% | ||
| Bloomberg U.S. Credit Index (reflects no deductions for fees, expenses or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 7.83% | (0.05%) | 3.15% | ||
| Series C | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 10.23% | 0.99% | 3.08% | ||
| Series C | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 7.92% | (0.87%) | 1.31% | |
| Series C | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 6.10% | (0.07%) | 1.57% | |
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