Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension Postretirement [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 18	$ 21
Interest Cost	37	39
Postretirement Benefit Expense	(123)	(41)	$ 98
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	9
Defined Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	18	21	29
Interest Cost	37	39	48
Expected Return on Plan Assets	(98)	(90)	(100)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(9)	(5)
Recognized net (gain) loss	(90)	(19)	112
Net periodic benefit cost	(142)	(58)	84
Curtailment and special termination benefits	3	0	0
Postretirement Benefit Expense	(139)	(58)	84
Defined Contribution Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 16	$ 17	$ 14