Shareholders' Equity - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Components of Accumulated Other Comprehensive Loss
Beginning Balance	$ 6,815	$ 5,845
Other		4
Ending Balance	7,113	6,815
Accumulated Other Comprehensive Loss
Components of Accumulated Other Comprehensive Loss
Beginning Balance	(789)	(1,739)
Other comprehensive income before reclassifications	108	813
Reclassified from Accumulated other comprehensive loss	69	133
Other		4
Ending Balance	(612)	(789)
Pension and Postretirement Benefits Adjustments
Components of Accumulated Other Comprehensive Loss
Beginning Balance	(799)	(1,780)
Other comprehensive income before reclassifications	214	861
Reclassified from Accumulated other comprehensive loss	69	120
Other		0
Ending Balance	(516)	(799)
Foreign Currency Translation Adjustments
Components of Accumulated Other Comprehensive Loss
Beginning Balance	9	42
Other comprehensive income before reclassifications	(103)	(51)
Reclassified from Accumulated other comprehensive loss	0	14
Other		4
Ending Balance	(94)	9
Deferred Gains (Losses) on Hedge Contracts
Components of Accumulated Other Comprehensive Loss
Beginning Balance	1	(1)
Other comprehensive income before reclassifications	(3)	3
Reclassified from Accumulated other comprehensive loss	0	(1)
Other		0
Ending Balance	$ (2)	$ 1