v2.4.0.8
Pension and Other Postretirement Benefit Plans - Obligation and Funded Status (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension Plans, Defined Benefit [Member]
     
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets January 1 $ 15,349 $ 12,481  
Actual return on plan assets 2,524 1,739  
Company contributions 645 1,853  
Effects of exchange rate changes (84) 3  
Benefits paid (780) (673)  
Settlements (236) (75)  
Other 17 21  
Fair value of plan assets December 31 17,435 15,349 12,481
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation January 1 17,646 14,416  
Service cost 682 555 619
Interest cost 665 661 718
Actuarial (gains) losses (1,689) 2,660  
Benefits paid (780) (673)  
Effects of exchange rate changes (21) 67  
Plan amendments (225) 2  
Curtailments (61) (17)  
Termination benefits 58 27 59
Settlements (236) (75)  
Other 16 23  
Benefit obligation December 31 16,055 17,646 14,416
Funded status December 31 1,380 (2,297)  
Recognized as:      
Other assets 2,811 355  
Accrued and other current liabilities (53) (50)  
Other noncurrent liabilities (1,378) (2,602)  
Other Postretirement Benefit Plans, Defined Benefit [Member]
     
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets January 1 1,760 1,628  
Actual return on plan assets 199 200  
Company contributions 73 48  
Effects of exchange rate changes 0 0  
Benefits paid (119) (115)  
Settlements 0 0  
Other 0 (1)  
Fair value of plan assets December 31 1,913 1,760 1,628
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation January 1 2,650 2,529  
Service cost 102 82 110
Interest cost 107 121 141
Actuarial (gains) losses (428) 88  
Benefits paid (119) (115)  
Effects of exchange rate changes (5) 0  
Plan amendments (38) (86)  
Curtailments 0 1  
Termination benefits 50 18 29
Settlements 0 0  
Other 10 12  
Benefit obligation December 31 2,329 2,650 2,529
Funded status December 31 (416) (890)  
Recognized as:      
Other assets 0 506  
Accrued and other current liabilities (8) (9)  
Other noncurrent liabilities $ (408) $ (1,387)