Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt, Disclosure) (Detail) - USD ($) $ in Millions		Aug. 01, 2015	Jan. 31, 2015	Aug. 02, 2014
Fair Value Measurements
Carrying Value		$ 4,759	$ 4,765	$ 4,972
Estimated Fair Value (a)	[1]	$ 5,233	$ 5,305	$ 5,443

[1] The estimated fair value of the Company’s publicly traded debt is based on reported transaction prices which are considered Level 2 inputs in accordance with ASC Topic 820, Fair Value Measurements and Disclosure. The estimates presented are not necessarily indicative of the amounts that the Company could realize in a current market exchange.