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Benefit Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
U.S. Pension Plans
 
Defined Benefit Plan Disclosure [Line Items]  
Employer contribution $ 6
Estimated future employer contributions for remainder of the year 4
Non-U.S. Pension Plans
 
Defined Benefit Plan Disclosure [Line Items]  
Employer contribution 242
Estimated future employer contributions for remainder of the year $ 67