Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 12
Sale of a subsidiary with redeemable noncontrolling interests	9	$ 4	$ 4
Exercises of redeemable noncontrolling interests	2	1	2
Ending balance	35	12
Payments to Acquire Additional Interest in Subsidiaries		14
Redeemable Noncontrolling Interest [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	98	99	82
Acquired through acquisitions			24
Sale of a subsidiary with redeemable noncontrolling interests	6	3	1
Redemption value adjustment for the current period	2	(2)	2
Exercises of redeemable noncontrolling interests		(12)	(14)
Exercises of redeemable noncontrolling interests	(2)	(2)	(1)
Impact of foreign exchange translation	1	13
Measurement period adjustments		(1)	5
Ending balance	$ 105	$ 98	$ 99