v3.20.4

Revenue Recognition (Schedule of Revenue by Major Product Categories) (Details) | 3 Months Ended
--- | ---
Oct. 31, 2020 | Nov. 02, 2019
Revenue from External Customer [Line Items] |  |
Percentage of total net sales | 100.00% | 100.00%
Apparel |  |
Revenue from External Customer [Line Items] |  |
Percentage of total net sales | 87.00% | 84.00%
Accessories |  |
Revenue from External Customer [Line Items] |  |
Percentage of total net sales | 7.00% | 11.00%
Other |  |
Revenue from External Customer [Line Items] |  |
Percentage of total net sales | 6.00% | 5.00%

X
- Definition Percentage of total net sales + References No definition available. + Details
Name: | asna_Percentageoftotalnetsales
Namespace Prefix: | asna_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=asna_ApparelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=asna_AccessoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=asna_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |