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Pensions and Other Postretirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Pension Plans, Defined Benefit [Member]
    
Components of net annual benefit cost (income):    
Service cost $ 5.4 $ 5.1
Interest cost 14.5 15.3
Expected return on plan assets (19.2) (19.2)
Amortization of prior service cost (gain) 0.5 0.5
Recognized net actuarial and other (gain) loss 17.5 13.2
Net periodic benefit cost from continuing operations 18.7 14.9
U.S. Defined Benefit Pension Plan [Member]
    
Pension and Other Postretirement Benefit Contributions [Abstract]    
Voluntary cash contributions made to U.S. defined benefit pension plan 13.0  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Voluntary Cash Contributions 40  
Other Postretirement Benefit Plans, Defined Benefit [Member]
    
Components of net annual benefit cost (income):    
Service cost 0 0
Interest cost 0.3 0.3
Expected return on plan assets 0 0
Amortization of prior service cost (gain) 0 0
Recognized net actuarial and other (gain) loss (0.4) (0.5)
Net periodic benefit cost from continuing operations $ (0.1) $ (0.2)