Intangible Assets - Changes in Carrying Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount, beginning balance			$ 1,844.8
Accumulated amortization, beginning balance			(1,051.2)
Net carrying amount, beginning balance			793.6
Amortization expense	$ (31.9)	$ (31.9)	(95.6)	$ (95.7)
Gross carrying amount, ending balance	1,844.8		1,844.8
Accumulated amortization, ending balance	(1,146.8)		(1,146.8)
Net carrying amount, ending balance	$ 698.0		$ 698.0