Share-Based Compensation (RSA - RSU Activity) (Details) (USD $)	9 Months Ended
	Oct. 27, 2012
Restricted Stock Unit Activity
Non-vested, Number of Underlying Shares, Beginning Balance	1,189,292
Non-vested, Weighted-Average Grant Date Fair Value, Beginning Balance	$ 49.11
Granted, Number of Underlying Shares	579,865
Granted, Weighted-Average Grant Date Fair Value	$ 48.65
Vested, Number of Underlying Shares	(355,831)
Vested, Weighted-Average Grant Date Fair Value	$ 52.45
Forfeited, Number of Underlying Shares	(210,681)
Forfeited, Weighted-Average Grant Date Fair Value	$ 53.55
Non-vested, Number of Underlying Shares, Ending Balance	1,202,645
Non-vested, Weighted-Average Grant Date Fair Value, Ending Balance	$ 47.13