Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ 25.4	$ 21.9
Finance Lease, Principal Payments	0.3	0.1
Finance Lease, Interest Payment on Liability	0.1	0.1
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	4.6	14.7
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1.2	$ 2.0