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Pension and Postretirement Benefits - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Cash contributions $ 55.5 $ 26.6 $ 147.2
Other Postretirement Benefit Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Cash contributions 2.7 2.9 18.0
Scenario, Forecast | Pension Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions by the company in 2014 234    
Scenario, Forecast | International Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions by the company in 2014 108    
Scenario, Forecast | U.S. Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions by the company in 2014 126    
Scenario, Forecast | Other Postretirement Benefit Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions by the company in 2014 $ 19