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