Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Financial Information for Subsidiary Guarantors and Non-guarantor Subsidiaries (Details)	Jan. 25, 2013	Dec. 31, 2012	Jun. 14, 2011	Jan. 26, 2011
8.0% Senior Unsecured Notes due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate for notes		8.00%
7.750% Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Stated interest rate for notes	7.75%	7.75%	7.75%	7.75%