Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 2,975.3	$ 2,552.3
Discount rate ceiling contingent acquisition obligations	6.00%
Level 1
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 0.0	0.0
Level 2
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	2,974.5	2,551.5
Level 3
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 0.8	$ 0.8