Segments (Details) $ in Millions	3 Months Ended
	Apr. 29, 2017 USD ($) segments	Apr. 30, 2016 USD ($)	Jan. 28, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segments	2
Business segment information
Total assets	$ 12,955	$ 12,901	$ 13,856
Total revenue	8,528	8,443
Operating income (loss)	300	372
Other income (expense)
Gain on sale of investments	0	2
Investment income and other	11	6
Interest expense	(19)	(20)
Earnings from continuing operations before income tax expense	292	360
Domestic [Member]
Business segment information
Total assets	11,691	11,562	12,496
Total revenue	7,912	7,829
Operating income (loss)	298	372
International [Member]
Business segment information
Total assets	1,264	1,339	$ 1,360
Total revenue	616	614
Operating income (loss)	$ 2	$ 0