Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Undistributed Earnings of Foreign Subsidiaries	$ 625,000,000
Cash held by non-US subsidiaries	330,000,000	257,000,000
Income tax benefits attributable to equity-based compensation	(7,700,000)	(6,400,000)	(3,600,000)
Tax expense/(benefit) related to changes in pension and post-retirement plan assets and benefit obligations	(61,100,000)	36,200,000	(13,400,000)
Unrealized tax asset on related tax loss	95,500,000	108,700,000
Valuation allowance against U.S. and non-U.S. deferred tax assets	45,500,000	41,900,000
Total valuation allowance	141,018,000	150,591,000
Increase in total amount of unrecognized tax benefits that would impact effective tax rate	42,200,000	27,700,000	18,900,000
Interest expense and penalties, related to unrecognized tax benefits	700,000	900,000		400,000
Unrecognized tax benefits, income tax penalties and interest accrued	4,700,000	4,000,000
Change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 7,100,000