v2.4.0.6
Pension And Other Postretirement Benefits (Benefit Obligations And Plan Assets Associated With Principal Benefit Plans) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]      
Medicare subsidy receipts $ 29 $ 15  
Pension Benefits - U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.00% 5.50%  
Long-term rate of compensation increase 5.75% 5.25%  
Benefit obligation at January 1 15,007 13,981  
Service cost 546 468 438
Interest cost 792 798 809
Actuarial loss/(gain) 1,954 553  
Foreign exchange rate changes        
Plan amendments, other   80  
Benefit obligation at December 31 17,035 15,007 13,981
Accumulated benefit obligation at December 31 14,081 12,764  
Pension Benefits - Non-U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.00% 4.80%  
Long-term rate of compensation increase 5.40% 5.20%  
Benefit obligation at January 1 25,722 23,344  
Service cost 574 480 421
Interest cost 1,267 1,175 1,121
Actuarial loss/(gain) 3,086 1,672  
Foreign exchange rate changes (303) 169  
Plan amendments, other 192 163  
Benefit obligation at December 31 29,068 25,722 23,344
Accumulated benefit obligation at December 31 25,480 22,958  
Other Postretirement Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.00% 5.50%  
Long-term rate of compensation increase 5.75% 5.25%  
Benefit obligation at January 1 7,331 6,748  
Service cost 121 101 94
Interest cost 393 395 408
Actuarial loss/(gain) 427 277  
Foreign exchange rate changes (11) 26  
Plan amendments, other 92 178  
Benefit obligation at December 31 7,880 7,331 6,748
Accumulated benefit obligation at December 31        
Benefit Payments For Funded And Unfunded Plans [Member] | Pension Benefits - U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefits paid (1,264) [1],[2] (873) [1],[2]  
Benefit Payments For Funded And Unfunded Plans [Member] | Pension Benefits - Non-U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefits paid (1,470) [1],[2] (1,281) [1],[2]  
Benefit Payments For Funded And Unfunded Plans [Member] | Other Postretirement Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefits paid $ (473) [1],[2] $ (394) [1],[2]  
[1] Benefit payments for funded and unfunded plans.
[2] For 2011 and 2010, other postretirement benefits paid are net of $29 million and $15 million of Medicare subsidy receipts, respectively.