Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Details)

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance, Derivatives $ (3,785) $ (3,236)
Beginning balance, Employee Benefit Plans (4,391) (3,947)
Beginning balance, Foreign Currency (364) [1] (256) [1]
Beginning balance (5,437) (66)
Net change, after tax, Securities 924 (161)
Net change, after tax, Derivatives 382 266
Net change, after tax, Employee Benefit Plans 952 75
Net change, after tax, Foreign Currency 31 27
Net change, after tax, Total 441 529
Ending balance, Securities 2,200  
Ending balance, Derivatives (3,403) (2,970)
Ending balance, Employee Benefit Plans (3,439) (3,872)
Ending balance, Foreign Currency (333) [1] (229) [1]
Ending balance (4,996) 463
Changes in Accumulated Other Comprehensive Income [Abstract]    
Net change in fair value of accumulated OCI, tax effect, Securities (1,300)  
Net change in fair value recorded in accumulated OCI, before tax, Derivatives 413 94
Net change in fair value recorded in accumulated OCI, tax effect, Derivatives (153) (35)
Net change in fair value recorded in accumulated OCI, after tax, Derivatives 260 59
Net realized (gains) losses reclassified into earnings, before tax, Derivatives 194 328
Net realized (gains) losses reclassified into earnings, tax effect, Derivatives (72) (121)
Net realized (gains) losses reclassified into earnings, after tax, Derivatives 122 207
Net change, before tax, Derivatives 607 422
Net change, tax effect, Derivatives (225) (156)
Net change, after tax, Derivatives 382 266
Net realized (gains) losses reclassified into earnings, before tax, Employee Benefit Plans 128 119
Net realized (gains) losses reclassified into earnings, tax effect, Employee Benefit Plans (46) (44)
Net realized (gains) losses reclassified into earnings, after tax, Employee Benefit Plans 82 75
Settlements and curtailments, before tax 1,381   
Settlements and curtailments, tax effect (511) 0
Settlements and curtailments, after tax 870   
Net change, before tax, Employee Benefit Plans 1,509 119
Net change, tax effect, Employee Benefit Plans (557) (44)
Net change, after-tax, Employee Benefit Plans 952 75
Net change in fair value recorded in accumulated OCI, before tax, Foreign Currency (256) (272)
Net change in fair value recorded in accumulated OCI, tax effect, Foreign Currency 287 299
Net change in fair value recorded in accumulated OCI, after tax, Foreign Currency 31 27
Net change, before tax, Foreign Currency (256) (272)
Net change, tax effect , Foreign Currency 287 299
Net change, after tax, Foreign Currency 31 27
Other comprehensive income, before tax 391 507
Other comprehensive income, tax effect 50 22
Other comprehensive income, net of tax 441 529
Available-for-sale Debt Securities [Member]
    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance, Securities 3,100 714
Net change, after tax, Securities 938 649
Ending balance, Securities 2,162 65
Changes in Accumulated Other Comprehensive Income [Abstract]    
Net change in fair value recorded in accumulated OCI, before tax, Securities (780) (576)
Net change in fair value of accumulated OCI, tax effect, Securities (291) (216)
Net change in fair value recorded in accumulated OCI, after tax, Securities (489) (360)
Net realized (gains) losses reclassified into earnings, before tax, Securities (712) (458)
Net realized (gains) losses reclassified into earnings, tax effect, Securities 263 169
Net realized (gains) losses reclassified into earnings, after tax, Securities (449) (289)
Net change, before tax, Securities (1,492) (1,034)
Net change, tax effect, Securities 554 385
Net change, after-tax, Securities (938) (649)
Available-for-sale Marketable Equity Securities [Member]
    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance, Securities 3 6,659
Net change, after tax, Securities (14) (810)
Ending balance, Securities 17 7,469
Changes in Accumulated Other Comprehensive Income [Abstract]    
Net change in fair value recorded in accumulated OCI, before tax, Securities 25 1,290
Net change in fair value of accumulated OCI, tax effect, Securities 10 469
Net change in fair value recorded in accumulated OCI, after tax, Securities 15 821
Net realized (gains) losses reclassified into earnings, before tax, Securities (2) (18)
Net realized (gains) losses reclassified into earnings, tax effect, Securities 1 7
Net realized (gains) losses reclassified into earnings, after tax, Securities (1) (11)
Net change, before tax, Securities 23 1,272
Net change, tax effect, Securities (9) (462)
Net change, after-tax, Securities 14 810
Accumulated Other Comprehensive Income (Loss) [Member]
    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Net change, after tax, Securities 924 (161)
Net change, after tax, Derivatives 382 266
Net change, after tax, Employee Benefit Plans 952 75
Net change, after tax, Foreign Currency 31 27
Changes in Accumulated Other Comprehensive Income [Abstract]    
Net change, after tax, Derivatives 382 266
Net change, after-tax, Employee Benefit Plans 952 75
Net change, after tax, Foreign Currency $ 31 $ 27
[1] Net change in fair value represents only the impact of changes in spot foreign exchange rates on the Corporation’s net investment in non-U.S. operations and related hedges.