Leases - Operating Lease Costs, and Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 56.3	$ 53.3
Short-term and variable lease cost	23.0	25.3
Total lease cost	79.3	78.6
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows - payments on operating leases	55.6	53.3
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 66.5	$ 65.1