XML 10 R2.htm IDEA: XBRL DOCUMENT v3.25.3
Shareholder Report
 6 Months Ended
Sep. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name INVESTORS CASH TRUST
Entity Central Index Key 0000863209
Entity Investment Company Type N-1A
Document Period End Date Sep. 30, 2025
C000081371  
Shareholder Report [Line Items]  
Fund Name DWS Central Cash Management Government Fund
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS Central Cash Management Government Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 730-1313.
Additional Information Phone Number (800) 730-1313
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 14.6667px; font-weight: 300; grid-area: auto; line-height: 17.6px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">dws.com/mutualreports</span>
Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Fund
$2
0.04%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.
Expenses Paid, Amount $ 2
Expense Ratio, Percent 0.04% [1]
AssetsNet $ 688,704,388
Holdings Count | Holding 68
Advisory Fees Paid, Amount $ 0
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
688,704,388
Number of Portfolio Holdings
68
Total Net Advisory Fees Paid ($)
0
Weighted Average Maturity
15 days
7-Day Current Yield
4.17%

Weighted average maturity, also known as effective maturity, is the weighted average of the maturity date of bonds held by the Fund taking into consideration any available maturity shortening features.

Yields fluctuate and are not guaranteed. The 7-day current yield is the annualized net investment income per share as of September 30, 2025. The 7-Day Current Yield would have been 4.08% had certain expenses not been reduced.
Holdings [Text Block]

What did the Fund invest in? 

Asset Allocation

Asset Type
% of Net Assets
Repurchase Agreements
58%
Government & Agency Obligations
43%
Other Assets and Liabilities, Net
(1%)
Total
100%

Holdings-based data is subject to change. 
[1] Annualized.