DWS Treasury Portfolio Annual Fund Operating Expenses - Investment Class Shares [Member] - DWS Treasury Portfolio - Investment Class Shares |
Mar. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.05% |
| Distribution and Service (12b-1) Fees | 0.25% |
| Other Expenses (as a percentage of Assets): | 0.29% |
| Expenses (as a percentage of Assets) | 0.59% |