Dispositions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2015	Aug. 01, 2014	Jul. 03, 2015	Aug. 01, 2014
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Income (loss) from discontinued operations before income taxes	$ 0	$ 2	$ 0	$ (11)
Other Disposals
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenues	6	20	14	46
Cost of revenues	6	21	12	43
Selling, general and administrative expenses	0	5	4	19
Intangible asset impairment charges	0	0	0	3
Operating loss	0	(6)	(2)	(19)
Non-operating income	0	8	2	8
Income (loss) from discontinued operations before income taxes	$ 0	$ 2	$ 0	$ (11)