v2.4.0.6

Total Unrecognized Compensation and Weighted-average Years Expected to be Recognized (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 28, 2012 Year
Unrecognized Share Based Compensation Expense [Line Items]
Total unrecognized compensation cost	$ 23.8
Weighted-average years expected to be recognized over (years)	2.4
Service-based Restricted Equity Awards
Unrecognized Share Based Compensation Expense [Line Items]
Total unrecognized compensation cost	12.6
Weighted-average years expected to be recognized over (years)	3.1
Performance-based Restricted Equity Awards
Unrecognized Share Based Compensation Expense [Line Items]
Total unrecognized compensation cost	9.1
Weighted-average years expected to be recognized over (years)	1.4
Market-based Restricted Equity Awards
Unrecognized Share Based Compensation Expense [Line Items]
Total unrecognized compensation cost	$ 2.0
Weighted-average years expected to be recognized over (years)	1.5

X

- Details

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Namespace Prefix:	asna_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration