Intangible Assets - Changes in Carrying Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 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)	(63.7)	$ (63.8)
Gross carrying amount, ending balance	1,844.8		1,844.8
Accumulated amortization, ending balance	(1,114.9)		(1,114.9)
Net carrying amount, ending balance	$ 729.9		$ 729.9