Restructuring Charges, Net and Asset Impairments - Roll Forward of Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 100	$ 101	$ 103
Provisions	84	140	125
Revisions to estimates	(36)	(21)	(12)
Payments	(83)	(122)	(115)
Foreign currency	(2)	2
Restructuring reserve, ending balance	63	100	101
Employee Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	99	97	98
Provisions	74	124	103
Revisions to estimates	(36)	(18)	(12)
Payments	(72)	(106)	(92)
Foreign currency	(2)	2
Restructuring reserve, ending balance	63	99	97
Facility Closure and Other Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	1	4	5
Provisions	10	16	22
Revisions to estimates	0	(3)	0
Payments	(11)	(16)	(23)
Foreign currency	0	0
Restructuring reserve, ending balance	$ 0	$ 1	$ 4