Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 21.5	$ 16.3	$ 10.7
Operating cash flows from finance leases	46.2	48.9	50.5
Financing cash flows from finance leases	47.0	42.3	39.2
Right-of-use assets obtained in exchange for lease obligations
Operating leases	36.3	293.6	34.6
Finance leases	$ 0.0	$ 33.1	$ 0.0