Restructuring - Activities by Program (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 637	$ 586
Expenses	666	868	$ 880
(Payments) receipts, net	(449)	(608)
Non-cash activity	(341)	(209)
Restructuring reserve, ending balance	513	637	586
Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	596	567
Expenses	212	451	385
(Payments) receipts, net	(329)	(422)
Non-cash activity	0	0
Restructuring reserve, ending balance	479	596	567
Accelerated Depreciation
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	0
Expenses	120	91	268
(Payments) receipts, net	0	0
Non-cash activity	(120)	(91)
Restructuring reserve, ending balance	0	0	0
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	41	19
Expenses	334	326	227
(Payments) receipts, net	(120)	(186)
Non-cash activity	(221)	(118)
Restructuring reserve, ending balance	$ 34	$ 41	$ 19