Restructuring and Integration - Schedule of Accrued Restructuring Liability (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	$ 6		$ 15
Restructuring charges	3	$ 10	9	$ 57
Cash payments	(5)		(18)
Accrued restructuring liability, Ending Balance	4		6
Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	6		12
Restructuring charges	1		7
Cash payments	(3)		(13)
Accrued restructuring liability, Ending Balance	4		6
Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance			3
Restructuring charges	2		2
Cash payments	$ (2)		$ (5)