Reportable Segments Net sales to external customers and long-lived assets (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
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3,097	$ 3,254	$ 3,268	$ 3,395	$ 3,142	$ 3,329	$ 3,498	$ 3,556	$ 13,014	$ 13,525	$ 14,580
Property, net	3,569				3,621				3,569	3,621	3,769
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									8,438	8,560	8,876
Property, net	2,208				2,220				2,208	2,220	2,283
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									4,576	4,965	5,704
Property, net	$ 1,361				$ 1,401				$ 1,361	$ 1,401	$ 1,486