Accumulated Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	$ 9,071.2	$ 9,189.5	$ 1,869.9	$ 1,676.0
Other comprehensive loss, net of tax:	(2.3)	(1.4)	0.0
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity	$ 0.0	$ 0.0	(10.9)	(11.4)
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity			(1.0)	0.0
Cumulative Effect, Period of Adoption, Adjustment | Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity				$ (6.7)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2018-02
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' equity			$ (8.2)