v2.4.0.6

Summary of Short-Term and Non-current Investments by Maturity Date (Detail) (USD $) In Millions, unless otherwise specified | Jul. 28, 2012 | Jul. 30, 2011
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year | $ 1.9 | $ 54.1
Available-for-sale investments maturities 1 to 3 years |  | 102.7
Available-for-sale investments maturities over 3 years | 2.7 | 35.8
Available-for-sale investments, Total | 4.6 | 192.6
Available-for-sale investments - short-term |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year | 1.4 | 54.1
Available-for-sale investments, Total | 1.4 | 54.1
Available-for-sale investments - short-term | Municipal bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year |  | 52.7
Available-for-sale investments, Total |  | 52.7
Available-for-sale investments - short-term | Restricted cash |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year | 1.4 | 1.4
Available-for-sale investments, Total | 1.4 | 1.4
Available-for-sale investments - non-current |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities 1 to 3 years |  | 102.7
Available-for-sale investments maturities over 3 years | 2.7 | 35.8
Available-for-sale investments, Total | 2.7 | 138.5
Available-for-sale investments - non-current | Municipal bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities 1 to 3 years |  | 102.7
Available-for-sale investments maturities over 3 years |  | 23.8
Available-for-sale investments, Total |  | 126.5
Available-for-sale investments - non-current | Auction rate securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities over 3 years | 2.7 | 12.0
Available-for-sale investments, Total | 2.7 | 12.0
Other non-current investments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year | 0.5 |
Available-for-sale investments, Total | 0.5 |
Total non-current investments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale investments maturities less than 1 year | 0.5 |
Available-for-sale investments maturities 1 to 3 years |  | 102.7
Available-for-sale investments maturities over 3 years | 2.7 | 35.8
Available-for-sale investments, Total | $ 3.2 | $ 138.5

X
- Definition Available for sale Securities, Debt Maturities, After One Through Three Years, Amortized Cost + References No definition available. + Details
Name: | asna_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughThreeYearsAmortizedCost
Namespace Prefix: | asna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale Securities, Debt Maturities, After Three Years, Amortized Cost + References No definition available. + Details
Name: | asna_AvailableForSaleSecuritiesDebtMaturitiesAfterThreeYearsAmortizedCost
Namespace Prefix: | asna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the total of all debt securities grouped by maturity dates, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are classified neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -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 Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 20 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -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 Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 20 -Subparagraph a -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration