DWS Government and Agency Securities Portfolio Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| DWS Gov Cash Inst Shares [Member] | DWS Government and Agency Securities Portfolio | DWS Government Cash Institutional Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.19% | 5.03% | 1.52% | 0.01% | 0.36% | 2.12% | 1.75% | 0.79% | 0.30% | 0.04% |