Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension postretirement - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ (75)	$ (175)	$ 43
U.S. and Canada defined benefit plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	13	15	18
Interest Cost	31	37	36
Expected Return on Plan Assets	(94)	(86)	(94)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(9)	(9)
Recognized net (gain) loss	(29)	(137)	81
Net periodic benefit cost	(88)	(180)	32
Curtailment and special termination benefits	0	(6)	0
Postretirement Benefit Expense	(88)	(186)	32
U.S. and Canada defined contribution plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 13	$ 11	$ 11