Accounting for Share-Based Payments (Details 1) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 29, 2016 USD ($) $ / shares shares
Schedule of Stock Option Activity
Outstanding, beginning balance, shares | shares	6,311
Outstanding, beginning balance, weighted-average exercise price per share | $ / shares	$ 35.98
Stock options granted | shares	862
Stock options granted, weighted-average exercise price per share | $ / shares	$ 69.44
Stock options canceled, forfeited, or expired | shares	(215)
Stock options canceled, forfeited, or expired, weighted-average exercise price per share | $ / shares	$ 54.21
Stock options exercised | shares	(1,527)
Stock options exercised, weighted-average exercise price per share | $ / shares	$ 30.26
Outstanding, ending balance, shares | shares	5,431
Outstanding, ending balance, weighted-average exercise price per share | $ / shares	$ 42.18
Outstanding, weighted-average remaining term	6 years 15 days
Outstanding, ending balance, aggregate intrinsic value | $	$ 160,105
Stock options vested and expected to vest, shares | shares	5,357	[1]
Stock options vested and expected to vest, weighted-average exercise price per share | $ / shares	$ 41.91	[1]
Stock options vested and expected to vest, weighted-average remaining term	6 years	[1]
Stock options vested and expected to vest, aggregate intrinsic value | $	$ 159,387	[1]
Stock options exercisable | shares	3,200
Stock options exercisable, weighted-average exercise price per share | $ / shares	$ 32.88
Stock options exercisable, weighted-average remaining term	4 years 3 months 11 days
Stock options exercisable, aggregate intrinsic value | $	$ 124,067

[1] Includes outstanding vested options as well as outstanding nonvested options after a forfeiture rate is applied.