Income Taxes - Current and deferred income tax expense for continuing operations (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
Current:
Federal									$ (74)	$ 212	$ 195
State									18	16	18
Non-U.S.									41	41	54
Current income tax expense, total									(15)	269	267
Deferred:
Federal									47	17	(12)
State									(7)	(14)	(4)
Non-U.S.									8	1	(3)
Deferred income tax expense, total									48	4	(19)
Income tax expense continuing operations, total	$ 79	$ (192)	$ 82	$ 64	$ 69	$ 76	$ 72	$ 56	$ 33	$ 273	$ 248