Restructuring and other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 167	$ 56	$ 25
Employee severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other	4	29	8
Employee severance | contingencies related to COVID19
Restructuring Cost and Reserve [Line Items]
Restructuring and other	29
Acquisition-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other	97	0	0
Legal and related
Restructuring Cost and Reserve [Line Items]
Restructuring and other	25	0	0
Restructuring, integration and other
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 41	$ 27	$ 17