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Income Taxes Components of Noncurrent Deferred Tax Assets and Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Deferred Tax Assets, Operating Loss Carryforwards $ 109.0 $ 152.1
Deferred Tax Assets, Tax Credit Carryforwards 60.0 101.9
Other Tax Carryforward, Deferred Tax Asset 21.1 22.7
Deferred Tax Assets, Fixed Assets 0 30.5
Deferred Tax Assets, Noncurrent, Capitalized Expenditures 78.8 62.8
Deferred Tax Assets, Net, Noncurrent 127.7 129.6
Deferred Tax Liabilities, Undistributed Foreign Earnings (105.6) (91.0)
Deferred Tax Liabilities, Property, Plant and Equipment (9.7) (6.6)
Deferred Tax Assets (Liabilities), Net, Noncurrent 12.4 32.0
Deferred Tax Assets, Noncurrent [Member]
    
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits 222.0 235.1
Deferred Tax Assets, Deferred Income 30.1 34.8
Deferred Tax Assets, Other 11.7 9.4
Deferred Tax Assets, Valuation Allowance, Noncurrent (405.0) (519.7)
Deferred Tax Assets, Current [Member]
    
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits 15.3 14.8
Deferred Tax Assets, Deferred Income 0 22.7
Deferred Tax Assets, Other $ 11.8 $ 6.4