Share-Based Compensation (Summary of Nonvested Stock Activity) (Details) (USD $) In Thousands, except Per Share data	1 Months Ended	3 Months Ended
	Mar. 31, 2010	Apr. 30, 2011		May 01, 2010
Share-Based Compensation
Balance at beginning of year, Shares		1,116		883
Granted, Shares	469	978	[1]	430	[1]
Vested, Shares		(246)		(177)
Forfeited, Shares		(6)		(2)
Balance at end of quarter, Shares		1,842		1,134
Balance at beginning of year, Weighted Average Grant Date Fair Value		$ 49.30		$ 45.44
Granted, Weighted Average Grant Date Fair Value		$ 52.11	[1]	$ 55.74	[1]
Vested, Weighted Average Grant Date Fair Value		$ 49.23		$ 47.41
Forfeited, Weighted Average Grant Date Fair Value		$ 54.28		$ 42.89
Balance at end of quarter, Weighted Average Grant Date Fair Value		$ 50.79		$ 49.03

[1] Includes 469 thousand shares granted in March 2011 which include both performance and service vesting conditions.