Income Taxes (Tax Credits Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Deferred tax credits	$ 10.2	$ 10.3
U.S. Federal
Tax Credit Carryforward [Line Items]
Deferred tax credits	2.6	2.3
U.S. Federal | Alternative Minimum Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Deferred tax credits	0.6
U.S. Federal | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Deferred tax credits	2.0
Foreign
Tax Credit Carryforward [Line Items]
Deferred tax credits	7.6	$ 8.0
Foreign | Withholding tax on inter-company debt
Tax Credit Carryforward [Line Items]
Deferred tax credits	$ 7.6