Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Net income	$ 279	$ 241	$ 460	$ 372
Other comprehensive income (loss), before tax:
Post employment and postretirement benefit plans, before tax	40	22	78	44
Marketable securities, before tax	0	0	0	(15)
Total other comprehensive income, before tax	40	22	78	29
Tax effect related to items of other comprehensive income	(16)	(8)	(31)	(12)
Total other comprehensive income, net of tax effect	24	14	47	17
Comprehensive income	$ 303	$ 255	$ 507	$ 389