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Pensions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
U.S. Benefit Plans
Sep. 30, 2013
U.S. Benefit Plans
Sep. 30, 2014
Non-U.S. Benefit Plan
Sep. 30, 2013
Non-U.S. Benefit Plan
Sep. 30, 2014
Common Stock
Dec. 31, 2013
Common Stock
Defined Benefit Plan Disclosure [Line Items]                    
Defined Benefit Plan, Benefits Paid         $ 7.3 $ 5.3 $ 1.0 $ 1.1    
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year         8.2   1.3      
Payments for Repurchase of Common Stock 3.4 3.3 6.7 0         6.7  
Defined Benefit Plan, Number of Shares of Equity Securities Issued by Employer and Related Parties Included in Plan Assets                 0.5 0.9
Defined Benefit Plan, Amount of Employer and Related Party Securities Included in Plan Assets                 $ 6.4 $ 13.6