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Summary of Change in Plan Assets (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
U.S. Benefit Plans
    
Change in Plan Assets    
Fair value of plan assets, beginning of year $ 97.0 $ 104.8
Actual return on plan assets 13.0 (3.5)
Company contribution 9.2 2.7
Benefits and expenses paid (7.0) (7.0)
Fair value of plan assets, end of year 112.2 97.0
Non-U.S. Benefit Plan
    
Change in Plan Assets    
Fair value of plan assets, beginning of year 47.9 50.6
Actual return on plan assets 5.3 (0.8)
Company contribution 2.3 1.1
Benefits and expenses paid (2.9) (2.5)
Translation and other 2.2 (0.5)
Fair value of plan assets, end of year $ 54.8 $ 47.9