DWS Tax-Exempt 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 |
|
| Tax Exempt Cash Managed Shares [Member] | DWS Tax-Exempt Portfolio | Tax-Exempt Cash Managed Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 2.99% | 2.98% | 0.93% | 0.01% | 0.38% | 1.13% | 1.04% | 0.50% | 0.17% | 0.02% |