Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt, Disclosure) (Detail) (USD $) In Millions, unless otherwise specified	Jul. 28, 2012		Jan. 28, 2012		Jul. 30, 2011
Fair Value Measurements
Carrying Value	$ 4,537		$ 3,538		$ 3,524
Fair Value	$ 4,927	[1]	$ 3,849	[1]	$ 3,704	[1]

[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.