v2.4.0.6

Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Apr. 28, 2012	Jul. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount by which fair value of available-for-sale securities is lower than cost basis	$ 1.0	$ 2.4

X

- Definition

Amount by which fair value of available-for-sale investment in debt securities is lower than cost basis.

+ References

No definition available.

+ Details

Name:	asna_AvailableForSaleInvestmentInDebtSecuritiesAmountOfCarryingValueExceedingFairValue
Namespace Prefix:	asna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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