Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May 03, 2014	Feb. 01, 2014	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Earning Per Share Disclosure [Line Items]
Net Income	$ 146	$ 120	$ 92	$ 162	$ 121	$ 104	$ 66	$ 138	$ 520	$ 429	$ 397
Weighted-average common shares outstanding									143.9	148.4	151.2
Basic earnings per share (in dollars per shares)	$ 1.03	$ 0.84	$ 0.63	$ 1.12	$ 0.83	$ 0.70	$ 0.44	$ 0.92	$ 3.61	$ 2.89	$ 2.62
Weighted-average common shares outstanding									143.9	148.4	151.2
Dilutive effect of potential common shares (in dollars per shares)									2.1	2.1	2.8
Weighted-average common shares outstanding assuming dilution									146.0	150.5	154.0
Diluted earnings per share (in dollars per share)	$ 1.01	$ 0.82	$ 0.63	$ 1.10	$ 0.81	$ 0.70	$ 0.44	$ 0.90	$ 3.56	$ 2.85	$ 2.58