Intangible Assets - Changes in Carrying Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance			$ 1,844.8
Accumulated amortization, beginning balance			(923.6)
Net carrying amount, beginning balance			921.2
Amortization expense	$ (31.9)	$ (31.9)	(63.8)	$ (64.7)
Gross carrying amount, ending balance	1,844.8		1,844.8
Accumulated amortization, ending balance	(987.4)		(987.4)
Net carrying amount, ending balance	$ 857.4		$ 857.4