Debt (Details) (USD $)				6 Months Ended
	Aug. 03, 2013 note	Feb. 02, 2013	Jul. 28, 2012	Aug. 03, 2013 Series A Unsecured Senior Notes [Member]	Aug. 03, 2013 Series B Unsecured Senior Notes [Member]	Aug. 03, 2013 Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Number of Unsecured Senior Notes Held	2
Unsecured senior notes	$ 150,000,000	$ 150,000,000	$ 150,000,000	$ 85,000,000	$ 65,000,000
Unsecured senior notes due date				Dec. 01, 2018	Dec. 01, 2021
Unsecured senior notes interest rate				6.38%	6.53%
Unsecured senior notes estimated fair value	185,000,000
Borrowing capacity for revolving credit facility						600,000,000
Revolving credit facility expiration date						Jun. 01, 2017
Sublimit for issuance of standby letters of credit						300,000,000
Amount outstanding on letters of credit						$ 0
Basis points margin over LIBOR						0.01%