Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Reconciliation of the Changes in the Plans' Benefit Obligations and Fair Value of Plan Assets (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Reconciliation of the Changes in the Plans' Benefit Obligations and Fair Value of Plan Assets (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Document Fiscal Year Focus 2013    
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year $ 26,202    
Fair value of plan assets at end of year 27,510    
U.S. Pension Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 31,868    
Service cost 1,349 998 870
Interest cost 1,449 1,410 1,309
Projected benefit obligation at end of year 29,508 31,868  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 24,941    
Fair value of plan assets at end of year 26,224 24,941  
U.S. Postretirement Medical Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 4,412    
Service cost 103 89 89
Interest cost 185 208 207
Projected benefit obligation at end of year 4,046 4,412  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 460    
Fair value of plan assets at end of year 355 460  
International Pension Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 1,089    
Service cost 47 41 34
Interest cost 44 41 39
Projected benefit obligation at end of year 1,076 1,089  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 801    
Fair value of plan assets at end of year 931 801  
Benefit Obligations [Member] | U.S. Pension Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 31,868 24,386  
Service cost 1,349 998  
Interest cost 1,449 1,410  
Gross benefits paid (813) (774)  
Plan participants’ contributions 0 0  
Plan amendments 140 (2)  
Actuarial (gain)/loss (4,485) 5,850  
Foreign currency exchange rate changes 0 0  
Curtailments and settlements 0 0  
Other 0 0  
Projected benefit obligation at end of year 29,508 31,868  
Fair Value of Plan Assets:      
Plan participants’ contributions 0 0  
Gross benefits paid (813) (774)  
Benefit Obligations [Member] | U.S. Postretirement Medical Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 4,412 3,836  
Service cost 103 89  
Interest cost 185 208  
Gross benefits paid (258) (233)  
Plan participants’ contributions 17 16  
Plan amendments 4 1  
Actuarial (gain)/loss (417) 495  
Foreign currency exchange rate changes 0 0  
Curtailments and settlements 0 0  
Other 0 0  
Projected benefit obligation at end of year 4,046 4,412  
Fair Value of Plan Assets:      
Plan participants’ contributions 17 16  
Gross benefits paid (258) (233)  
Benefit Obligations [Member] | International Pension Benefits
      
Benefit Obligations:      
Projected benefit obligation at beginning of year 1,089 841  
Service cost 47 41  
Interest cost 44 41  
Gross benefits paid (21) (20)  
Plan participants’ contributions 4 4  
Plan amendments 0 0  
Actuarial (gain)/loss (55) 112  
Foreign currency exchange rate changes (26) 24  
Curtailments and settlements (6) (5)  
Other 0 51  
Projected benefit obligation at end of year 1,076 1,089  
Fair Value of Plan Assets:      
Plan participants’ contributions 4 4  
Gross benefits paid (21) (20)  
Fair Value of Plan Assets [Member] | U.S. Pension Benefits
      
Benefit Obligations:      
Gross benefits paid (813) (774)  
Plan participants’ contributions 0 0  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 24,941 22,663  
Actual return on plan assets 2,082 2,684  
Employer contributions 14 368  
Plan participants’ contributions 0 0  
Gross benefits paid (813) (774)  
Foreign currency exchange rate changes 0 0  
Curtailments and settlements 0 0  
Other 0 0  
Fair value of plan assets at end of year 26,224 24,941  
Fair Value of Plan Assets [Member] | U.S. Postretirement Medical Benefits
      
Benefit Obligations:      
Gross benefits paid (258) (233)  
Plan participants’ contributions 17 16  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 460 174  
Actual return on plan assets 28 19  
Employer contributions 108 475  
Plan participants’ contributions 17 16  
Gross benefits paid (258) (233)  
Foreign currency exchange rate changes 0 0  
Curtailments and settlements 0 0  
Other 0 9  
Fair value of plan assets at end of year 355 460  
Fair Value of Plan Assets [Member] | International Pension Benefits
      
Benefit Obligations:      
Gross benefits paid (21) (20)  
Plan participants’ contributions 1 1  
Fair Value of Plan Assets:      
Fair value of plan assets at beginning of year 801 613  
Actual return on plan assets 81 56  
Employer contributions 90 74  
Plan participants’ contributions 1 1  
Gross benefits paid (21) (20)  
Foreign currency exchange rate changes (20) 20  
Curtailments and settlements (1) (4)  
Other 0 61  
Fair value of plan assets at end of year $ 931 $ 801