Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Funded Status (Details)

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Employee Benefit Plans - Funded Status (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended
Jan. 24, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Non-U.S. Pension Plans [Member]
Dec. 31, 2012
Non-U.S. Pension Plans [Member]
Dec. 31, 2011
Non-U.S. Pension Plans [Member]
Dec. 31, 2013
Qualified Pension Plans [Member]
Dec. 31, 2012
Qualified Pension Plans [Member]
Dec. 31, 2011
Qualified Pension Plans [Member]
Dec. 31, 2013
Nonqualified and Other Pension Plans [Member]
Dec. 31, 2012
Nonqualified and Other Pension Plans [Member]
Dec. 31, 2011
Nonqualified and Other Pension Plans [Member]
Dec. 31, 2013
Postretirement Health and Life Plans [Member]
Dec. 31, 2012
Postretirement Health and Life Plans [Member]
Dec. 31, 2011
Postretirement Health and Life Plans [Member]
Change in fair value of plan assets                              
Fair value, January 1   $ 23,525 $ 21,729 $ 2,306 [1] $ 2,022 [1]   $ 16,274 [1] $ 15,070 [1]   $ 3,063 [1] $ 3,061 [1]   $ 86 [1] $ 91 [1]  
Actual return on plan assets       146 [1] 115 [1]   2,873 [1] 2,020 [1]   (217) [1] 126 [1]   9 [1] 10 [1]  
Company contributions       131 [1] 152 [1]   0 [1] 0 [1]   98 [1] 112 [1]   61 [1] 117 [1]  
Plan participant contributions       1 [1] 3 [1]   0 [1] 0 [1]   0 [1] 0 [1]   138 [1] 139 [1]  
Settlements and curtailments       (80) [1] 0 [1]   0 [1] 0 [1]   (7) [1] 0 [1]   0 [1] 0 [1]  
Benefits paid       (80) [1] (77) [1]   (871) [1] (816) [1]   (217) [1] (236) [1]   (237) [1] (290) [1]  
Federal subsidy on benefits paid                         15 [1] 19 [1]  
Foreign currency exchange rate changes       33 [1] 91 [1]                    
Fair value, December 31   23,525 21,729 2,457 [1] 2,306 [1] 2,022 [1] 18,276 [1] 16,274 [1] 15,070 [1] 2,720 [1] 3,063 [1] 3,061 [1] 72 [1] 86 [1] 91 [1]
Change in projected benefit obligation                              
Projected benefit obligation, January 1       2,460 [1] 1,984 [1]   15,655 [1] 14,891 [1]   3,334 [1] 3,137 [1]   1,574 [1] 1,619 [1]  
Service cost       32 [1] 40 [1] 43 0 [1] 236 [1] 423 1 [1] 1 [1] 3 9 [1] 13 [1] 15
Interest cost       98 [1] 97 [1] 99 623 [1] 681 [1] 746 120 [1] 138 [1] 152 54 [1] 71 [1] 80
Plan participant contributions       1 [1] 3 [1]   0 [1] 0 [1]   0 [1] 0 [1]   138 [1] 139 [1]  
Plan amendments       2 [1] 2 [1]   0 [1] 0 [1]   0 [1] 0 [1]   0 [1] 0 [1]  
Settlements and curtailments (58)     (116) [1] 0 [1]   17 [1] (889) [1]   (7) [1] 0 [1]   0 [1] 0 [1]  
Actuarial loss (gain)       156 [1] 328 [1]   (1,279) [1] 1,552 [1]   (161) [1] 294 [1]   (197) [1] (4) [1]  
Benefits paid       (80) [1] (77) [1]   (871) [1] (816) [1]   (217) [1] (236) [1]   (237) [1] (290) [1]  
Federal subsidy on benefits paid                         15 [1] 19 [1]  
Foreign currency exchange rate changes       27 [1] 83 [1]               0 [1] 7 [1]  
Projected benefit obligation, December 31       2,580 [1] 2,460 [1] 1,984 [1] 14,145 [1] 15,655 [1] 14,891 [1] 3,070 [1] 3,334 [1] 3,137 [1] 1,356 [1] 1,574 [1] 1,619 [1]
Amount recognized, December 31       (123) [1] (154) [1]   4,131 [1] 619 [1]   (350) [1] (271) [1]   (1,284) [1] (1,488) [1]  
Accumulated Benefit Obligation       2,463 [1] 2,345 [1]   14,145 [1] 15,655 [1]   3,067 [1] 3,334 [1]        
Overfunded (Unfunded) Status Of ABO       (6) [1] (39) [1]   4,131 [1] 619 [1]   (347) [1] (271) [1]        
Provision For Future Salaries       117 [1] 115 [1]   0 [1] 0 [1]   3 [1] 0 [1]        
Projected benefit obligation       $ 2,580 [1] $ 2,460 [1] $ 1,984 [1] $ 14,145 [1] $ 15,655 [1] $ 14,891 [1] $ 3,070 [1] $ 3,334 [1] $ 3,137 [1] $ 1,356 [1] $ 1,574 [1] $ 1,619 [1]
Weighted-Average Assumptions, Discount Rate     4.95% 4.30% [1] 4.23% [1]   4.85% [1] 4.00% [1]   4.55% [1] 3.65% [1]   4.50% [1] 3.65% [1]  
Weighted-Average Assumptions, Rate of Compensation increase       3.40% [1] 4.37% [1]         4.00% [1] 4.00% [1]        
[1] The measurement date for the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported.