Fixed Income SHares Series R 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. TIPS Index (reflects no deductions for fees, expenses or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 7.01% | 1.12% | 3.09% | ||
| ICE BofA U.S. Treasury Inflation-Linked 7-10 Year Index (reflects no deductions for fees, expenses or taxes)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 8.90% | 0.73% | 3.11% | ||
| Series R | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 11.20% | 0.78% | 3.85% | ||
| Series R | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 9.23% | (1.40%) | 2.05% | |
| Series R | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 6.53% | (0.35%) | 2.18% | |
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