Leases (Supplemental Cash Flow Information) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 5.2
Operating Lease, Liability Reduction	4.7
Finance Lease, Principal Payments	0.2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 9.1