v2.4.0.6
Employee Benefit Plans - Pension and Postretirement Plans (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
U.S. (Pension Benefits) [Member]
     
Change in Benefit Obligation      
Benefit obligation at January 1 $ 5,539 $ 5,042  
Service cost 225 229 194
Interest cost 247 260 277
Plan amendments   12  
Actuarial loss 642 305  
Benefits paid (478) (309)  
Benefit obligation at December 31* 6,175 5,539 5,042
Change in Fair Value of Plan Assets      
Fair value of plan assets at January 1 3,890 3,144  
Actual return on plan assets 64 458  
Company contributions 673 597  
Benefits paid (478) (309)  
Fair value of plan assets at December 31 4,149 3,890 3,144
Funded Status (2,026) (1,649)  
Int'l (Pension Benefits) [Member]
     
Change in Benefit Obligation      
Benefit obligation at January 1 3,206 3,101  
Service cost 98 90 79
Interest cost 178 169 144
Plan participant contributions 5 4  
Plan amendments (53)    
Actuarial loss 195 59  
Benefits paid (116) (115)  
Curtailment   (1)  
Foreign currency exchange rate change (29) (101)  
Benefit obligation at December 31* 3,484 3,206 3,101
Change in Fair Value of Plan Assets      
Fair value of plan assets at January 1 2,581 2,281  
Actual return on plan assets 53 259  
Company contributions 226 216  
Plan participant contributions 5 4  
Benefits paid (116) (115)  
Curtailment   (1)  
Foreign currency exchange rate change (27) (63)  
Fair value of plan assets at December 31 2,722 2,581 2,281
Funded Status (762) (625)  
Other Benefits [Member]
     
Change in Benefit Obligation      
Benefit obligation at January 1 862 839  
Service cost 10 11 9
Interest cost 42 46 47
Plan participant contributions 23 20  
Government subsidy 4    
Plan amendments 35    
Actuarial loss 20 14  
Benefits paid (68) (70)  
Foreign currency exchange rate change (2) 2  
Benefit obligation at December 31* 926 862 839
Change in Fair Value of Plan Assets      
Company contributions 41 50  
Plan participant contributions 23 20  
Government subsidy 4    
Benefits paid (68) (70)  
Funded Status $ (926) $ (862)