Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 9.7	$ (56.0)	$ 41.4	$ (264.3)
Other comprehensive income (loss), net of tax:
Foreign currency translation	20.2	11.9	(15.9)	(42.4)
Interest rate swaps	(8.6)	(11.5)	25.3	(35.5)
Tax receivable agreement	(9.4)	(9.7)	(5.3)	16.2
Pension	0.2	0.0	(0.6)	(0.2)
Other comprehensive income (loss), net of tax	2.4	(9.3)	3.5	(61.9)
Comprehensive income (loss)	$ 12.1	$ (65.3)	$ 44.9	$ (326.2)