Income Taxes Income Taxes - Operating Loss Carryforwards (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Net operating loss and capital loss carryforwards	$ 59,400,000	$ 46,400,000
State Operating Loss Carryforwards	537,600,000
Unremitted foreign earnings	24,200,000
Undistributed Earnings of Foreign Subsidiaries	2,700,000,000
U.S. Federal
Operating Loss Carryforwards [Line Items]
Foreign tax credit carryforwards	121,800,000
Non-U.S. Tax Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	101,600,000
Operating Loss Carryforwards subject to expiration	96,000,000
Operating Loss Carryforwards not subject to expiration	5,600,000
Operating Loss Carryforwards valuation allowance	49,400,000
Net operating loss and capital loss carryforwards	101,600,000
Non-U.S. income tax holidays	23,600,000	15,600,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards valuation allowance	$ 316,600,000