Mortgage-Backed Securities ETF Average Annual Total Returns |
12 Months Ended | 27 Months Ended | 32 Months Ended | 50 Months Ended | 58 Months Ended | 60 Months Ended | 83 Months Ended | 85 Months Ended | 103 Months Ended | 112 Months Ended | 120 Months Ended |
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Dec. 31, 2025 |
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Dec. 31, 2025 |
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| BLOOMBERG US AGGREGATE INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member] | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 7.30% | 6.85% | 4.25% | (0.05%) | 0.07% | (0.36%) | 1.96% | 2.12% | 1.76% | 1.60% | 2.01% |
| BLOOMBERG US MBS INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member] | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 8.58% | 0.15% | 1.59% | ||||||||
| ETF | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 8.40% | 1.16% | 2.59% | ||||||||
| ETF | After Taxes on Distributions | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 6.56% | (0.14%) | 1.22% | ||||||||
| ETF | After Taxes on Distributions and Sales | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 4.94% | 0.31% | 1.39% |