Quarterly Financial Data Net sales and gross profit (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 3,097	$ 3,254	$ 3,268	$ 3,395	$ 3,142	$ 3,329	$ 3,498	$ 3,556	$ 13,014	$ 13,525	$ 14,580
Gross Profit	$ 976	$ 1,264	$ 1,270	$ 1,245	$ 962	$ 1,233	$ 1,241	$ 1,245	$ 4,755	$ 4,681