Nonpension Postretirement and Postemployment Benefits Components of Postretirement Expense (Details) - Nonpension postretirement - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ (207)	$ (75)	$ (175)
U.S. and Canada defined benefit plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	13	13	15
Interest Cost	20	31	37
Expected Return on Plan Assets	(92)	(94)	(86)
Amortization of Unrecognized Prior Service Cost (Credit)	(9)	(9)	(9)
Recognized net (gain) loss	(152)	(29)	(137)
Net periodic benefit cost	(220)	(88)	(180)
Curtailment and special termination benefits	0	0	(6)
Postretirement Benefit Expense	(220)	(88)	(186)
U.S. and Canada defined contribution plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Postretirement Benefit Expense	$ 13	$ 13	$ 11