Leases (Lease Cost) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 0.2
Operating Lease, Cost	5.7
Short-term Lease, Cost	0.1
Operating Lease, Expense	6.0
Sublease Income	(0.1)
Lease, Cost	$ 5.9