The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Supplemental Financial Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Feb. 02, 2013	Feb. 28, 2012	May 29, 2007 2007 Notes Issuer	Mar. 04, 2011 2011 Notes Issuer	Feb. 28, 2012 2012 Notes	Sep. 20, 2012 2012 Notes Issuer	Mar. 12, 2012 2012 Notes Issuer	Feb. 28, 2012 2012 Notes Issuer
Debt Instrument [Line Items]
Principal amount of senior notes		$ 400.0	$ 935.0	$ 450.0		$ 625.0	$ 100.0	$ 400.0
Percentage of ownership of domestic subsidiaries	100.00%
Percentage senior secured first lien notes		9.00%			9.00%