Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
40 Months Ended |
45 Months Ended |
53 Months Ended |
57 Months Ended |
60 Months Ended |
120 Months Ended |
Feb. 28, 2025 |
Feb. 28, 2025 |
Feb. 28, 2025 |
Feb. 28, 2025 |
Feb. 28, 2025 |
Feb. 28, 2025 |
Feb. 28, 2025 |
| Without Sales Load [Member] | C000219740 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.11%
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2.65%
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| Without Sales Load [Member] | C000012087 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.15%
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1.18%
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1.33%
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| Without Sales Load [Member] | C000037537 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.27%
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(0.24%)
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1.25%
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| Without Sales Load [Member] | C000012088 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.98%
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(2.05%)
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0.81%
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| Without Sales Load [Member] | C000037538 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.78%
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(5.26%)
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(0.23%)
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| Without Sales Load [Member] | C000012090 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.33%
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(7.47%)
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(0.82%)
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| Without Sales Load [Member] | C000221912 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
(1.70%)
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(14.99%)
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| Without Sales Load [Member] | C000037536 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.05%
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2.41%
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1.75%
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| Without Sales Load [Member] | C000053739 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.27%
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0.27%
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1.92%
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| Without Sales Load [Member] | C000052220 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.52%
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0.63%
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2.12%
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| Without Sales Load [Member] | C000053740 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.42%
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0.53%
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1.97%
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| Without Sales Load [Member] | C000069126 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.02%
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1.10%
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1.22%
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| Without Sales Load [Member] | C000069125 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.30%
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0.65%
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1.67%
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| Without Sales Load [Member] | C000227271 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.74%
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(0.07%)
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| Without Sales Load [Member] | C000231752 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.18%
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(2.41%)
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.83%)
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(1.31%)
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| ICE BofA US Broad Market Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE BofA US Broad Market Index
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| Average Annual Return, Percent |
5.84%
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(0.56%)
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1.53%
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| ICE AMT-Free US National Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free US National Municipal Index
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| Average Annual Return, Percent |
2.71%
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0.72%
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2.19%
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| ICE AMT-Free US National Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free US National Municipal Index
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| Average Annual Return, Percent |
2.71%
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0.72%
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2.19%
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| ICE AMT-Free US National Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free US National Municipal Index
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| Average Annual Return, Percent |
2.71%
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0.72%
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2.19%
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| ICE AMT-Free US National Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free US National Municipal Index
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| Average Annual Return, Percent |
2.71%
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0.72%
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2.19%
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| Bloomberg U.S. Universal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg U.S. Universal Index
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| Average Annual Return, Percent |
6.30%
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(0.07%)
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1.87%
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| Bloomberg U.S. Universal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg U.S. Universal Index
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| Average Annual Return, Percent |
6.30%
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(0.53%)
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| Bloomberg U.S. Universal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg U.S. Universal Index
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| Average Annual Return, Percent |
6.30%
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(1.10%)
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| ICE® 0-3 Month US Treasury Securities Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; white-space-collapse: preserve-breaks;">®</sup> 0-3 Month US Treasury Securities Index
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| Average Annual Return, Percent |
3.96%
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2.07%
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| ICE® U.S. Treasury 1-3 Year Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> U.S. Treasury 1-3 Year Bond Index
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| Average Annual Return, Percent |
5.28%
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1.30%
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1.46%
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| ICE® U.S. Treasury 3-7 Year Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> U.S. Treasury 3-7 Year Bond Index
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| Average Annual Return, Percent |
5.40%
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(0.12%)
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1.37%
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| ICE® U.S. Treasury 7-10 Year Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> U.S. Treasury 7-10 Year Bond Index
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| Average Annual Return, Percent |
5.11%
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(1.93%)
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0.92%
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| ICE® U.S. Treasury 10-20 Year Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> U.S. Treasury 10-20 Year Bond Index
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| Average Annual Return, Percent |
4.83%
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(5.27%)
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(0.19%)
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| ICE® U.S. Treasury 20+ Year Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> U.S. Treasury 20+ Year Bond Index
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| Average Annual Return, Percent |
2.46%
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(7.40%)
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(0.74%)
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| ICE® BofA® Long US Treasury Principal STRIPS Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; white-space-collapse: preserve-breaks;">®</sup> BofA<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; white-space-collapse: preserve-breaks;">®</sup> Long US Treasury Principal STRIPS Index
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| Average Annual Return, Percent |
(1.62%)
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(15.12%)
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| ICE® Short US Treasury Securities Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Short US Treasury Securities Index
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| Average Annual Return, Percent |
4.44%
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2.21%
|
1.72%
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| ICE AMT-Free California Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free California Municipal Index
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| Average Annual Return, Percent |
2.37%
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0.48%
|
2.14%
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| ICE AMT-Free New York Plus Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE AMT-Free New York Plus Municipal Index
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| Average Annual Return, Percent |
2.69%
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0.68%
|
2.16%
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| ICE® Short Maturity AMT-Free US National Municipal Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
ICE<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; white-space-collapse: preserve-breaks;">®</sup> Short Maturity AMT-Free US National Municipal Index
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| Average Annual Return, Percent |
3.14%
|
|
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|
|
1.20%
|
1.40%
|
| Bloomberg U.S. Agency Bond Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg U.S. Agency Bond Index
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| Average Annual Return, Percent |
5.44%
|
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0.53%
|
1.66%
|
| iBoxx USD Liquid Investment Grade BBB 0+ Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
iBoxx USD Liquid Investment Grade BBB 0+ Index
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| Average Annual Return, Percent |
6.90%
|
|
0.07%
|
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| iBoxx MSCI ESG Advanced USD Liquid Investment Grade Index |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
iBoxx MSCI ESG Advanced USD Liquid Investment Grade Index
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| Average Annual Return, Percent |
6.37%
|
(2.21%)
|
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