Leases Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for operating leases included in operating activities	$ 45.6	$ 58.7
Cash paid for finance leases included in operating activities	0.9	1.1
Cash paid for finance leases included in financing activities	2.0	2.7
Right-of-use assets obtained in exchange for operating lease liabilities	18.4	35.2
Right-of-use assets obtained in exchange for financing lease liabilities	$ 0.8	$ 0.0