Common stock transactions (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended				12 Months Ended
	Mar. 15, 2017	Aug. 24, 2016	Feb. 03, 2017	Oct. 28, 2016	Jul. 29, 2016	Apr. 29, 2016	Feb. 03, 2017	Jan. 29, 2016	Jan. 30, 2015
Common stock transactions
Aggregate purchase price							$ 990,474	$ 1,299,613	$ 800,095
Cash dividend paid (in dollars per share)			$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 1.00	$ 0.88
Cash dividend declared (in dollars per share)	$ 0.26
Common Stock
Common stock transactions
Shares acquired under share repurchase program							12,354	17,556	14,106
Aggregate purchase price							$ 10,810	$ 15,361	$ 12,342
Common Stock | Pursuant to Authorized Repurchase Program
Common stock transactions
Common stock repurchase program, increase in the authorized amount		$ 1,000,000
Common stock repurchase authorization			$ 5,000,000				5,000,000
Remaining authorization available under the common stock repurchase program			$ 933,300				$ 933,300
Shares acquired under share repurchase program							12,400	17,600	14,100
Aggregate purchase price							$ 1,000,000	$ 1,300,000	$ 800,000