Leases - Other Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental disclosures of cash flow information:
Cash payments for finance leases included in cash flows from financing activities	$ 0.0	$ 0.4
Cash payments for operating leases included in cash flows from operating activities	7.2	7.0
Right-of-use assets obtained in exchange for operating lease liabilities	$ 4.8	$ 80.6