Restructuring and Related Reorganization Charges - Summary of the Restructuring and Related Reorganization Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance	$ 103	$ 17
Charges	55	231	$ 24
Payments	(84)	(137)
Non-cash items (1)	(48)	(8)
Accrued liability, Ending Balance	26	103	17
Employee Severance and Benefits
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance	103	11
Charges	30	205
Payments	(77)	(120)
Non-cash items (1)	(32)	7
Accrued liability, Ending Balance	24	103	11
Other
Restructuring Reserve [Roll Forward]
Accrued liability, Beginning Balance	0	6
Charges	25	26
Payments	(7)	(17)
Non-cash items (1)	(16)	(15)
Accrued liability, Ending Balance	$ 2	$ 0	$ 6