Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Funded Status as of the Respective Measurement Dates in Each Year and the Amounts Recognized in Balance Sheet (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Funded Status as of the Respective Measurement Dates in Each Year and the Amounts Recognized in Balance Sheet (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]    
Document Fiscal Year Focus 2013  
Funded Status:    
Fair value of plan assets $ 27,510 $ 26,202
U.S. Pension Benefits
   
Funded Status:    
Fair value of plan assets 26,224 24,941
Benefit obligation (29,508) (31,868)
Funded status recognized at December 31 (3,284) (6,927)
Funded Status Amounts Recognized in our Balance Sheet:    
Other non-current assets 0 0
Other current liabilities (16) (14)
Pension and postretirement benefit obligations (3,268) (6,913)
Net liability at December 31 (3,284) (6,927)
Amounts Recognized in AOCI:    
Unrecognized net prior service cost (1,286) (1,318)
Unrecognized net actuarial gain (loss) 1,233 (3,187)
Gross unrecognized cost at December 31 (53) (4,505)
Deferred tax asset at December 31 20 1,694
Net unrecognized cost at December 31 (33) (2,811)
U.S. Postretirement Medical Benefits
   
Funded Status:    
Fair value of plan assets 355 460
Benefit obligation (4,046) (4,412)
Funded status recognized at December 31 (3,691) (3,952)
Funded Status Amounts Recognized in our Balance Sheet:    
Other non-current assets 0 0
Other current liabilities (97) (108)
Pension and postretirement benefit obligations (3,594) (3,844)
Net liability at December 31 (3,691) (3,952)
Amounts Recognized in AOCI:    
Unrecognized net prior service cost (79) (79)
Unrecognized net actuarial gain (loss) (29) (441)
Gross unrecognized cost at December 31 (108) (520)
Deferred tax asset at December 31 41 196
Net unrecognized cost at December 31 (67) (324)
International Pension Benefits
   
Funded Status:    
Fair value of plan assets 931 801
Benefit obligation (1,076) (1,089)
Funded status recognized at December 31 (145) (288)
Funded Status Amounts Recognized in our Balance Sheet:    
Other non-current assets 47 26
Other current liabilities (3) (3)
Pension and postretirement benefit obligations (189) (311)
Net liability at December 31 (145) (288)
Amounts Recognized in AOCI:    
Unrecognized net prior service cost (9) (13)
Unrecognized net actuarial gain (loss) (7) (86)
Gross unrecognized cost at December 31 (16) (99)
Deferred tax asset at December 31 2 26
Net unrecognized cost at December 31 $ (14) $ (73)