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 |
|
| Government Cash Managed Shares [Member] | DWS Government and Agency Securities Portfolio | Government Cash Managed Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.97% | 4.84% | 1.36% | 0.01% | 0.28% | 1.92% | 1.55% | 0.60% | 0.05% | 0.01% |