Financial Instruments − Fair Value and Concentrations of Credit Risk - Contingent Consideration Liability are Measured at Fair Value on a Recurring Basis Using Unobservable Inputs (Level 3) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Payment of contingent consideration			$ 27.2	$ 0.0
Obligations
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration, beginning balance	$ 179.5	$ 83.9	206.4	67.3
Payments of contingent consideration	0.0	0.0	(28.7)	0.0
Change in fair value of contingent consideration	1.2	88.2	3.0	104.8
Contingent consideration, ending balance	$ 180.7	$ 172.1	180.7	$ 172.1
Payment of contingent consideration			$ 27.2