State Street SPDR Portfolio Long Term Treasury Index ETF Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| State Street SPDR Portfolio Long Term Treasury Index ETF | State Street SPDR Portfolio Long Term Treasury Index ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.34% | (6.26%) | 3.28% | (29.63%) | (4.69%) | 17.69% | 14.76% | (1.87%) | 8.42% | 1.21% |