v3.20.4

Leases (Schedule of Cash Flow, Supplemental Disclosure) (Details) - USD ($) $ in Millions	3 Months Ended
	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

X

- Definition

Operating lease liabilities from obtaining right-of-use assets, Non-cash

+ References

No definition available.

+ Details

Name:	asna_OperatingleaseliabilitiesfromobtainingrightofuseassetsNoncash
Namespace Prefix:	asna_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_OperatingLeasePayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration