Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Amounts in AOCI Expected to be Amortized and Recognized as a Component of Net Periodic Benefit Cost (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Amounts in AOCI Expected to be Amortized and Recognized as a Component of Net Periodic Benefit Cost (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
U.S. Pension Benefits
 
Defined Benefit Plan Disclosure [Line Items]  
Prior service cost / (benefit) $ 172
U.S. Postretirement Medical Benefits
 
Defined Benefit Plan Disclosure [Line Items]  
Prior service cost / (benefit) 4
International Pension Benefits
 
Defined Benefit Plan Disclosure [Line Items]  
Prior service cost / (benefit) $ 2