Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (327.3)	$ (140.8)	$ (314.0)
Other comprehensive income (loss), net of tax:
Foreign currency translation	72.0	(10.3)	(90.6)
Interest rate swaps	(32.8)	0.0	0.0
Tax receivable agreement	(0.9)	0.0	0.0
Pension	(4.9)	(13.4)	(1.1)
Comprehensive income (loss)	$ (293.9)	$ (164.5)	$ (405.7)