Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension Postretirement [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 21	$ 29
Interest Cost	39	48
Postretirement Benefit Expense	(41)	98	$ 101
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	21	29	28
Interest Cost	39	48	55
Expected Return on Plan Assets	(90)	(100)	(98)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(5)	(3)
Recognized net (gain) loss	(19)	112	133
Curtailment and special termination benefits - net loss	0	0	(28)
Postretirement Benefit Expense	(58)	84	87
Defined Contribution Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 17	$ 14	$ 14