Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension postretirement - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 43	$ (123)	$ (41)
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	9
U.S. and Canada defined benefit plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	18	18	21
Interest Cost	36	37	39
Expected Return on Plan Assets	(94)	(98)	(90)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(9)	(9)
Recognized net (gain) loss	81	(90)	(19)
Net periodic benefit cost	32	(142)	(58)
Curtailment and special termination benefits	0	3	0
Postretirement Benefit Expense	32	(139)	(58)
U.S. and Canada defined contribution plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 11	$ 16	$ 17