Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 35.1	$ 51.0
Operating cash flows for finance leases	0.8	1.5
Financing cash flows for finance leases	8.9	29.6
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	16.5	16.6
Finance leases	$ 1.6	$ 1.6