Employee Benefit Plans (Accumulated Other Comprehensive Loss Expected to be Recognized as Components of Net Periodic Benefit Cost During Next Fiscal Year) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Postretirement Benefits [Member]
Net actuarial loss	$ 0.1
Estimated prior service credit	(0.3)
Domestic Plan [Member] | Defined Benefit Pension Plans [Member]
Net actuarial loss	5.2
Estimated prior service credit	0.0
Foreign Plan [Member] | Defined Benefit Pension Plans [Member]
Net actuarial loss	7.2
Estimated prior service credit	$ (0.1)