Debt (Details) (USD $)	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012
Debt Instrument [Line Items]
Number of unsecured senior notes held	2
Unsecured senior notes	$ 150,000,000	$ 150,000,000
Unsecured senior notes estimated fair value	175,000,000
Collateral trust	34,900,000	21,300,000
Series A Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Unsecured senior notes	85,000,000
Unsecured senior notes due date	Dec. 01, 2018
Unsecured senior notes interest rate	6.38%
Series B Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Unsecured senior notes	65,000,000
Unsecured senior notes due date	Dec. 01, 2021
Unsecured senior notes interest rate	6.53%
Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
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
Basis points margin over LIBOR	1.125%	1.50%
Revolving credit facility borrowing amount		0
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Standby letter of credit, amount outstanding	33,800,000	45,500,000
Trade Letters Of Credit [Member]
Debt Instrument [Line Items]
Trade Letters Of Credit Amount	$ 38,000,000	$ 39,900,000