State Street SPDR Portfolio SP 400 Mid Cap 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 SP 400 Mid Cap ETF | State Street SPDR Portfolio SP 400 Mid Cap ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.48% | 13.86% | 16.42% | (13.06%) | 24.68% | 13.43% | 25.11% | (10.30%) | 15.27% | 18.21% |