Pensions and Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Percentage of Supplemental Pension received	100.00%
SERP Expense	$ (0.1)	$ (0.2)	$ (0.2)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss	3.0
Other long-term liabilities	0.0	0.0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss	0.1
Other long-term liabilities	7.6	$ 8.2
Supplemental Employee Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Annual supplemental retirement benefit	0.4
Other long-term liabilities	$ 3.1