Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating Lease, Payments	$ 18.6	$ 19.4	$ 44.0	$ 41.3
Finance Lease, Principal Payments	0.5	0.1	0.8	0.2
Finance Lease, Interest Payment on Liability	0.3	0.1	0.4	0.2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	3.1	26.1	7.7	40.8
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 2.7	$ 0.1	$ 3.9	$ 2.1