Shareholders' Equity - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Components of Accumulated Other Comprehensive Loss
Beginning Balance	$ 5,845	$ 5,518
Other	4
Ending Balance	6,815	5,845
Accumulated Other Comprehensive Loss
Components of Accumulated Other Comprehensive Loss
Beginning Balance	(1,739)	(1,847)
Other comprehensive income (loss) before reclassifications	813	(34)
Reclassified from Accumulated other comprehensive loss	133	142
Other	4
Ending Balance	(789)	(1,739)
Pension and Postretirement Benefits Adjustments
Components of Accumulated Other Comprehensive Loss
Beginning Balance	(1,780)	(1,811)
Other comprehensive income (loss) before reclassifications	861	(115)
Reclassified from Accumulated other comprehensive loss	120	146
Other	0
Ending Balance	(799)	(1,780)
Foreign Currency Translation Adjustments
Components of Accumulated Other Comprehensive Loss
Beginning Balance	42	(36)
Other comprehensive income (loss) before reclassifications	(51)	78
Reclassified from Accumulated other comprehensive loss	14	0
Other	4
Ending Balance	9	42
Deferred Gains (Losses) on Hedge Contracts
Components of Accumulated Other Comprehensive Loss
Beginning Balance	(1)	0
Other comprehensive income (loss) before reclassifications	3	3
Reclassified from Accumulated other comprehensive loss	(1)	(4)
Other	0
Ending Balance	$ 1	$ (1)