v3.20.4

Leases (Schedule of Cash Flow, Supplemental Disclosure) (Details) - USD ($) $ in Millions | 3 Months Ended
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Oct. 31, 2020 | Nov. 02, 2019
Leases [Abstract] |  |
Cash payments arising from operating lease liabilities (included in cash flows from operating activities) | $ 97.8 | $ 123.7
Non-cash operating lease liabilities from obtaining right-of-use assets | $ 0.0 | $ 1.1

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- Definition Operating lease liabilities from obtaining right-of-use assets, Non-cash + References No definition available. + Details
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Namespace Prefix: | asna_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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