Accounting Policies and Practices - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Jul. 01, 2021	Dec. 31, 2020
Accounting Policies And Practices [Line Items]
Cash and cash equivalents	$ 769			$ 769			$ 506
Allowance for expected credit losses	4			$ 4		$ 0	$ 15
Foreign exchange gains (losses)	$ 1	$ (3)	$ (9)		$ 2
Business combination tax receivable agreement percentage of benefit deemed to realize				85.00%
Minimum percentage of unrecognized tax benefit likely to be realized				50.00%
ASU 2020-04
Accounting Policies And Practices [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, adoption date	Mar. 12, 2020			Mar. 12, 2020
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true
ASU 2020-08
Accounting Policies And Practices [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021			Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true