Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance of unrecognized tax benefits	$ 188	$ 103	$ 98
Additions/(reductions) related to acquisitions	(1)
Additions/(reductions) related to acquisitions		58	0
Additions based on tax positions taken in current year	41	21	17
Additions based on tax positions taken in prior years	3	14	9
Reductions based on tax positions taken in prior years	(2)	0	(1)
Reductions resulting from statute of limitation lapses	0	(5)	(13)
Reductions related to settlements with taxing authorities	0	(3)	(7)
Ending balance of unrecognized tax benefits	$ 229	$ 188	$ 103