Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 56.2	$ (103.5)	$ 97.6	$ (367.8)
Other comprehensive income (loss), net of tax:
Foreign currency translation	(28.0)	46.1	(43.9)	3.7
Interest rate swaps	2.7	(2.3)	28.0	(37.8)
Tax receivable agreement	2.2	(11.1)	(3.1)	5.1
Pension	0.1	0.0	(0.5)	(0.2)
Other comprehensive income (loss), net of tax	(23.0)	32.7	(19.5)	(29.2)
Comprehensive income (loss)	$ 33.2	$ (70.8)	$ 78.1	$ (397.0)