Effective on or about January 1, 2013, the following disclosure is added to the “SHAREHOLDER FEES” table in the “FEES AND EXPENSES OF THE FUND” section for the relevant classes in the summary section of each fund’s prospectus:
|
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| Label | Element | Value | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||
| Registrant Name | dei_EntityRegistrantName | CASH ACCOUNT TRUST | ||||||||||||||||
| Prospectus Date | rr_ProspectusDate | Aug. 01, 2012 | ||||||||||||||||
| Supplement [Text Block] | dim1_SupplementTextBlock |
Effective on or about January 1, 2013, the following disclosure is added to the “SHAREHOLDER FEES” table in the “FEES AND EXPENSES OF THE FUND” section for the relevant classes in the summary section of each fund’s prospectus:
|
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|
Government & Agency Securities Portfolio
|
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| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||
| Supplement [Text Block] | dim1_SupplementTextBlock |
Effective on or about January 1, 2013, the following disclosure is added to the “SHAREHOLDER FEES” table in the “FEES AND EXPENSES OF THE FUND” section for the relevant classes in the summary section of each fund’s prospectus:
|
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| Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | SHAREHOLDER FEES (paid directly from your investment) |
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|
Government & Agency Securities Portfolio | DWS Government & Agency Money Fund
|
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| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||
| Account Service Fee (for fund account balances below $10,000, and subject to certain exceptions) | rr_MaximumAccountFee | 20 | ||||||||||||||||
| SHAREHOLDER FEES (paid directly from your investment) | rr_ShareholderFeeOther | none | ||||||||||||||||
|
Tax-Exempt Portfolio
|
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| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||
| Supplement [Text Block] | dim1_SupplementTextBlock |
Effective on or about January 1, 2013, the following disclosure is added to the “SHAREHOLDER FEES” table in the “FEES AND EXPENSES OF THE FUND” section for the relevant classes in the summary section of each fund’s prospectus:
|
||||||||||||||||
| Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | SHAREHOLDER FEES (paid directly from your investment) |
||||||||||||||||
|
Tax-Exempt Portfolio | DWS Tax-Exempt Money Fund
|
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| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||||||
| Account Service Fee (for fund account balances below $10,000, and subject to certain exceptions) | rr_MaximumAccountFee | 20 | ||||||||||||||||
| SHAREHOLDER FEES (paid directly from your investment) | rr_ShareholderFeeOther | none | ||||||||||||||||
|
Document and Entity Information
|
12 Months Ended |
|---|---|
|
Aug. 01, 2012
|
|
| Risk/Return: | |
| Document Type | Other |
| Document Period End Date | Nov. 28, 2012 |
| Registrant Name | CASH ACCOUNT TRUST |
| Central Index Key | 0000858372 |
| Amendment Flag | false |
| Document Creation Date | Nov. 28, 2012 |
| Document Effective Date | Nov. 28, 2012 |
| Prospectus Date | Aug. 01, 2012 |
| Label | Element | Value |
|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |
| Registrant Name | dei_EntityRegistrantName | CASH ACCOUNT TRUST |
| Prospectus Date | rr_ProspectusDate | Aug. 01, 2012 |
| Document Creation Date | dei_DocumentCreationDate | Nov. 28, 2012 |