Income Taxes Deferred Income Tax Assets and Liabilities and Valuation Allowances (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards	$ 156.4	$ 188.9
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, Not Subject to Expiration	$ 87.9
NOL and Tax Credit Carryforward, Range of Carryforward Period, Lower End of Range	5 years
NOL and Tax Credit Carryforward, Range of Carryforward Period, Upper End of Range	20 years
Undistributed Earnings of Foreign Subsidiaries	$ 724.1
Deferred Tax Assets, Valuation Allowance	167.3	$ 156.9
difference relating to amount of tax deduction allowed versus US GAAP for stock based compensation [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	$ 5.1