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Postretirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
U.S. Benefit Plan [Member]
        
Net periodic pension expense for defined benefit pension plans        
Service Cost            
Interest cost 1.5 1.8 5.5 5.5
Expected return on plan assets (1.6) (1.7) (6.0) (5.3)
Amortization of actuarial loss 1.3 1.1 4.1 3.3
Net periodic pension expense 1.2 1.2 3.6 3.5
Non-U.S. Benefit Plan [Member]
        
Net periodic pension expense for defined benefit pension plans        
Service Cost 0.1   0.2 0.1
Interest cost 0.7 0.8 2.0 2.2
Expected return on plan assets (0.7) (0.8) (2.0) (2.5)
Amortization of actuarial loss 0.2 0.2 0.6 0.7
Net periodic pension expense $ 0.3 $ 0.2 $ 0.8 $ 0.5