Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating Lease, Payments	$ 28.3	$ 22.3	$ 72.3	$ 63.6
Finance Lease, Principal Payments	0.4	0.1	1.2	0.3
Finance Lease, Interest Payment on Liability	0.2	0.2	0.6	0.4
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	9.9	8.5	17.6	49.3
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 0.1	$ 0.2	$ 4.0	$ 2.3