Restructuring - Activities by Program (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			$ 513
Expenses	$ 236	$ 258	333	$ 384
(Payments) receipts, net			(158)
Non-cash activity			(111)
Restructuring reserve, ending balance	577		577
Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			479
Expenses	110	106	151	132
(Payments) receipts, net			(84)
Non-cash activity			0
Restructuring reserve, ending balance	546		546
Accelerated Depreciation
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Expenses	22	47	43	76
(Payments) receipts, net			0
Non-cash activity			(43)
Restructuring reserve, ending balance	0		0
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			34
Expenses	104	$ 105	139	$ 176
(Payments) receipts, net			(74)
Non-cash activity			(68)
Restructuring reserve, ending balance	$ 31		$ 31