Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Jan. 02, 2016
Equity [Abstract]
Cash flow hedges — unrealized net gain (loss)	$ (67)	$ (39)
Foreign currency translation adjustments	(1,505)	(1,314)
Postretirement and postemployment benefits:
Net experience loss	(14)	(16)
Prior service cost	11	(7)
Total accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)	$ (1,575)	$ (1,376)