Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Additional Information (Detail)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Additional Information (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    
Health care cost trends, initial annual rate increase 7.00%    
Health care cost trends, an ultimate trend rate 5.00%    
Expected year when ultimate trend rate to be reached 2018    
Accumulated benefit obligation for pension plans $ 28,586 $ 30,350  
Employer contributions 212 917 1,436
Fair value of plan assets 27,510 26,202  
Plan assets target allocation 100.00% 100.00%  
Other Investments [Member] | Private Equity and Real Estate
     
Defined Benefit Plan Disclosure [Line Items]      
Unfunded commitments to limited partnerships 858    
Other Investments [Member] | Private Equity and Real Estate | Minimum
     
Defined Benefit Plan Disclosure [Line Items]      
Redemption notice period, lower limit 12 years    
Other Investments [Member] | Private Equity and Real Estate | Maximum
     
Defined Benefit Plan Disclosure [Line Items]      
Redemption notice period, upper limit 18 years    
U.S. Postretirement Medical Benefits
     
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 355 460  
U.S. Postretirement Medical Benefits | Minimum
     
Defined Benefit Plan Disclosure [Line Items]      
Postretirement medical plans service minimum eligibility year 10 years    
Postretirement medical plans service minimum eligibility age 55 years    
Employee Defined Contribution Plans
     
Defined Benefit Plan Disclosure [Line Items]      
Contributions charged to expense 90 83 80
Defined Contribution Money Purchase Plans
     
Defined Benefit Plan Disclosure [Line Items]      
Contributions charged to expense 80 80 76
Pension Benefits
     
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions   16  
Postretirement Medical Benefits
     
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions 108 110  
International Pension Benefits
     
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 931 801  
Domestic
     
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26,579 25,401  
Domestic | Cash and Cash Equivalents [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% 0.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 5.00% 5.00%  
Fair value of plan assets 626 242  
International [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 931 801  
International [Member] | Cash and Cash Equivalents [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% 0.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 5.00% 5.00%  
Fair value of plan assets 28 22  
Fixed Income Securities [Member] | Domestic
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 15.00% 25.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 35.00% 35.00%  
Fair value of plan assets 7,877 8,251  
Fixed Income Securities [Member] | International [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 15.00% 15.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 35.00% 35.00%  
Fair value of plan assets 239 219  
Equity Securities [Member] | Domestic
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 25.00% 35.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 55.00% 55.00%  
Fair value of plan assets 10,462 9,852  
Equity Securities [Member] | International [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 50.00% 50.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 65.00% 65.00%  
Fair value of plan assets 422 341  
Other Investments [Member] | Domestic | Hedge Funds
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 8.00% 5.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 15.00% 15.00%  
Fair value of plan assets 3,738 2,829  
Other Investments [Member] | Domestic | Other
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 1.00% [1] 1.00% [1]  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 10.00% [1] 10.00% [1]  
Fair value of plan assets 756 [1] 1,362 [1]  
Other Investments [Member] | Domestic | Structured Products(1)
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 3.00% 1.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 10.00% 10.00%  
Fair value of plan assets 1,397 1,239  
Other Investments [Member] | Domestic | Structured Products [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% [2] 0.00% [2]  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 5.00% [2] 5.00% [2]  
Fair value of plan assets 326 [2]    
Other Investments [Member] | International [Member] | Other
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% [1] 0.00% [1]  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 20.00% [1] 20.00% [1]  
Fair value of plan assets 124 [1] 124 [1]  
Other Investments [Member] | International [Member] | Structured Products(1)
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% 0.00%  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 17.00% 17.00%  
Fair value of plan assets $ 63 $ 46  
Other Investments [Member] | International [Member] | Structured Products [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Actual Plan Asset Allocations 0.00% [2] 0.00% [2]  
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 10.00% [2] 10.00% [2]  
[1] Represents global balanced-risk commingled funds, consisting primarily of equity, bonds, and some currencies and commodities.
[2] Represents mortgage and asset-backed securities.