Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016
Equity [Abstract]
Cash flow hedges — unrealized net gain (loss)	$ (61)	$ (67)
Foreign currency translation adjustments	(1,426)	(1,505)
Postretirement and postemployment benefits:
Net experience gain (loss)	34	2
Prior service credit (cost)	(4)	(5)
Total accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)	$ (1,457)	$ (1,575)