v3.25.2
DWS Tax-Exempt Portfolio N-1A Cover
Apr. 30, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name CASH ACCOUNT TRUST
Entity Central Index Key 0000858372
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2025
Prospectus Date Aug. 01, 2025