Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	Jan. 02, 2016	Jan. 03, 2015
Equity [Abstract]
Cash flow hedges — unrealized net gain (loss)	$ (39)	$ (24)
Foreign currency translation adjustments	(1,314)	(1,119)
Postretirement and postemployment benefits:
Net experience loss	(16)	(18)
Prior service cost	(7)	(52)
Total accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)	$ (1,376)	$ (1,213)