Leases - Operating Lease Costs, and Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating lease cost	$ 14.0	$ 13.7
Short-term and variable lease cost	6.8	5.2
Total lease cost	20.8	18.9
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows - Payments on operating leases	14.3	13.7
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 11.7	$ 10.2