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Consolidated Statements Of Income And Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Consolidated Statements Of Income And Comprehensive Income [Abstract]    
Currency translation adjustment, tax $ 0.7  
Amortization of pension related costs, tax $ 0.3 $ 0.5