Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 42, 45

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph ((a)(1),(b))

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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

Changes In Intangible Assets And Goodwill (Unamortizable Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 28, 2012	Apr. 30, 2011	Jan. 29, 2011
Indefinite-lived Intangible Assets by Major Class [Line Items]
Unamortizable intangible assets	$ 314,736
Total intangible assets	569,488	566,578	570,110
Trade Name [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Unamortizable intangible assets	293,400
Publishing Contracts [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Unamortizable intangible assets	$ 21,336