Equity Summary of Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	Dec. 29, 2018	Dec. 30, 2017
Equity [Abstract]
Cash flow hedges — unrealized net gain (loss)	$ (53)	$ (61)
Foreign currency translation adjustments	(1,467)	(1,426)
Postretirement and postemployment benefits:
Net experience gain (loss)	23	34
Prior service credit (cost)	(3)	(4)
Total accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)	$ (1,500)	$ (1,457)