Income Taxes Deferred Income Tax Assets and Liabilities and Valuation Allowances (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards	$ 173.4	$ 173.4	$ 156.4
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, Not Subject to Expiration	98.4	$ 98.4
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	931.8	$ 931.8
Deferred Tax Assets, Valuation Allowance	164.8	$ 164.8	$ 167.3
China
Tax Credit Carryforward [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (5.4)