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Retirement Benefit Plans (Details 9) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
U.S. and Puerto Rico [Member]
   
Pension plans with accumulated benefit obligations in excess of plan assets    
Accumulated benefit obligation $ 22.4 $ 6.1
Plan assets at fair market value 13.0 0
Foreign-based defined benefit plans [Member]
   
Pension plans with accumulated benefit obligations in excess of plan assets    
Accumulated benefit obligation 190.4 167.2
Plan assets at fair market value $ 168.7 $ 154.1