Restructuring Restructuring Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 125	$ 134
Restructuring	24	136	$ 148
Payments made during the period	(80)	(151)	(119)
Foreign currency and other	(6)	6
Ending Balance	63	125	134
Employee Termination Benefits Liability
Restructuring Reserve [Roll Forward]
Beginning Balance	125	134
Restructuring	24	136
Payments made during the period	(80)	(151)
Foreign currency and other	(6)	6
Ending Balance	63	125	134
Other Exit Costs Liability
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Restructuring	0	0
Payments made during the period	0	0
Foreign currency and other	0	0
Ending Balance	$ 0	$ 0	$ 0