Income Taxes Change in Valuation Allowances (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of Valuation Allowances
Deferred Tax Assets, Valuation Allowance	$ 332.2	$ 467.3	$ 392.9	$ 489.9
(Reversed) charged to costs and expenses	(72.8)	65.2	(49.5)
(Reversed) charged to gross tax assets and other accounts	(62.3)	9.2	(47.5)
Operating Loss Carryforwards	1,263.1
Deferred Tax Liabilities, Undistributed Foreign Earnings	2,214.2	1,959.8
Foreign Tax Authority
Summary of Valuation Allowances
Income Tax Examination, Year under Examination	2006
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	1,053.4
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	209.7
Domestic Tax Authority
Summary of Valuation Allowances
Income Tax Examination, Year under Examination	2009
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 60.3
Minimum | Foreign Tax Authority
Summary of Valuation Allowances
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2015
Minimum | Domestic Tax Authority
Summary of Valuation Allowances
Income Tax Examination, Year under Examination		2002
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2015
Maximum | Foreign Tax Authority
Summary of Valuation Allowances
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2033
Maximum | Domestic Tax Authority
Summary of Valuation Allowances
Income Tax Examination, Year under Examination		2006
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2034