Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 02, 2015 segments	May 03, 2014	Jan. 31, 2015
Segment Reporting [Abstract]
Number of reportable segments	2
Business segment information
Total revenue	$ 8,558	$ 8,639
Operating income (loss)	86	210
Gain on sale of investments	2	0
Other income (expense)
Investment income and other	7	4
Interest expense	(20)	(23)
Earnings from continuing operations before income tax (benefit) expense	75	191
Total assets	13,719	13,911	15,256
Domestic [Member]
Business segment information
Total revenue	7,890	7,781
Operating income (loss)	304	226
Other income (expense)
Total assets	12,395	11,514	12,998
International [Member]
Business segment information
Total revenue	668	858
Operating income (loss)	(218)	(16)
Other income (expense)
Total assets	$ 1,324	$ 2,397	$ 2,258