Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension Postretirement [Member] - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 29	$ 28
Interest Cost	48	55
Postretirement Benefit Expense	98	101	$ (238)
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	29	28	34
Interest Cost	48	55	50
Expected Return on Plan Assets	(100)	(98)	(86)
Amortization of Unrecognized Prior Service Cost (Credit)	(5)	(3)	(3)
Recognized net (gain) loss	112	133	(247)
Curtailment and special termination benefits - net loss	0	(28)	1
Postretirement Benefit Expense	84	87	(251)
Defined Contribution Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 14	$ 14	$ 13