Intangible Assets - Changes in Carrying Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance			$ 1,844.8
Accumulated amortization, beginning balance			(795.1)
Net carrying amount, beginning balance			1,049.7
Amortization expense	$ (31.9)	$ (31.6)	(64.7)	$ (62.5)
Gross carrying amount, ending balance	1,844.8		1,844.8
Accumulated amortization, ending balance	(859.8)		(859.8)
Net carrying amount, ending balance	$ 985.0		$ 985.0