Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Projected Benefit Obligation, Accumulated Benefit Obligation, and Fair Value of Plan Assets for Pension Plans With an Accumulated Benefit Obligation in Excess of Plan Assets (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Projected Benefit Obligation, Accumulated Benefit Obligation, and Fair Value of Plan Assets for Pension Plans With an Accumulated Benefit Obligation in Excess 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 $ 27,510 $ 26,202  
U.S. Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 29,508 31,868  
Accumulated benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 27,623 29,382  
Fair value of plan assets, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 26,224 24,941  
Projected benefit obligation, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 29,508 31,868  
Accumulated benefit obligation, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 27,623 29,382  
Fair value of plan assets, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 26,224 24,941  
Defined Benefit Plan, Benefit Obligation 29,508 31,868  
Service cost 1,349 998 870
Interest cost 1,449 1,410 1,309
Fair value of plan assets 26,224 24,941  
U.S. Postretirement Medical Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 4,046 4,412  
Service cost 103 89 89
Interest cost 185 208 207
Fair value of plan assets 355 460  
International Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 764 1,028  
Accumulated benefit obligation, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 658 917  
Fair value of plan assets, Projected Benefit Obligation Exceeds the Fair Value of the Plan Assets 580 723  
Projected benefit obligation, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 361 678  
Accumulated benefit obligation, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 301 606  
Fair value of plan assets, Accumulated Benefit Obligation Exceeds the Fair Value of Plan Assets 184 388  
Defined Benefit Plan, Benefit Obligation 1,076 1,089  
Service cost 47 41 34
Interest cost 44 41 39
Fair value of plan assets 931 801  
Benefit Obligations [Member] | U.S. Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 29,508 31,868 24,386
Service cost 1,349 998  
Interest cost 1,449 1,410  
Defined Benefit Plan, Benefits Paid 813 774  
Defined Benefit Plan, Contributions by Plan Participants 0 0  
Defined Benefit Plan, Plan Amendments 140 (2)  
Defined Benefit Plan, Actuarial Gain (Loss) 4,485 (5,850)  
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) 0 0  
Defined Benefit Plan, Purchases, Sales, and Settlements 0 0  
Defined Benefit Plan Other Benefit Obligations 0 0  
Benefit Obligations [Member] | U.S. Postretirement Medical Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 4,046 4,412 3,836
Service cost 103 89  
Interest cost 185 208  
Defined Benefit Plan, Benefits Paid 258 233  
Defined Benefit Plan, Contributions by Plan Participants 17 16  
Defined Benefit Plan, Plan Amendments 4 1  
Defined Benefit Plan, Actuarial Gain (Loss) 417 (495)  
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) 0 0  
Defined Benefit Plan, Purchases, Sales, and Settlements 0 0  
Defined Benefit Plan Other Benefit Obligations 0 0  
Benefit Obligations [Member] | International Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 1,076 1,089 841
Service cost 47 41  
Interest cost 44 41  
Defined Benefit Plan, Benefits Paid 21 20  
Defined Benefit Plan, Contributions by Plan Participants 4 4  
Defined Benefit Plan, Plan Amendments 0 0  
Defined Benefit Plan, Actuarial Gain (Loss) 55 (112)  
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) (26) 24  
Defined Benefit Plan, Purchases, Sales, and Settlements 6 5  
Defined Benefit Plan Other Benefit Obligations 0 51  
Fair Value of Plan Assets [Member] | U.S. Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefits Paid 813 774  
Defined Benefit Plan, Contributions by Plan Participants 0 0  
Fair value of plan assets 26,224 24,941 22,663
Defined Benefit Plan, Actual Return on Plan Assets 2,082 2,684  
Defined Benefit Plan, Contributions by Employer 14 368  
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 0 0  
Defined Benefit Plan, Settlements, Plan Assets 0 0  
Defined Benefit Plan Other Fair Value Of Plan Assets 0 0  
Fair Value of Plan Assets [Member] | U.S. Postretirement Medical Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefits Paid 258 233  
Defined Benefit Plan, Contributions by Plan Participants 17 16  
Fair value of plan assets 355 460 174
Defined Benefit Plan, Actual Return on Plan Assets 28 19  
Defined Benefit Plan, Contributions by Employer 108 475  
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 0 0  
Defined Benefit Plan, Settlements, Plan Assets 0 0  
Defined Benefit Plan Other Fair Value Of Plan Assets 0 (9)  
Fair Value of Plan Assets [Member] | International Pension Benefits
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefits Paid 21 20  
Defined Benefit Plan, Contributions by Plan Participants 1 1  
Fair value of plan assets 931 801 613
Defined Benefit Plan, Actual Return on Plan Assets 81 56  
Defined Benefit Plan, Contributions by Employer 90 74  
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets (20) 20  
Defined Benefit Plan, Settlements, Plan Assets 1 4  
Defined Benefit Plan Other Fair Value Of Plan Assets $ 0 $ (61)