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Accumulated Other Comprehensive Income/(Loss) (Details) (USD $)
In Millions
12 Months Ended
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance$ (91)  
Net change1,2365,596(4,770)
Ending Balance1,001(91) 
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Total Other comprehensive income/(loss) before tax1,9729,072(7,576)
Total Other comprehensive income/(loss) tax effect(736)(3,476)2,806
Total Other comprehensive income/(loss) after tax1,2365,596(4,770)
Accumulated other comprehensive income/(loss) (Numeric) [Abstract]   
After-tax unrealized losses not related to credit on debt securities(81)(226) 
Accumulated Net Unrealized Investment Gain (Loss) [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance2,032(2,101)380
Cumulative effect of changes in accounting principles(144)  
Net change6104,133(2,481)
Ending Balance2,4982,032(2,101)
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Net unrealized gains/(losses) arising during the period before tax3,9827,870(3,071)
Net unrealized gains/(losses) arising during the period tax effect(1,540)(3,029)1,171
Net unrealized gains/(losses) arising during the period after tax2,4424,841(1,900)
Reclassification adjustment for realized (gains)/losses included in net income before tax(2,982)(1,152)(965)
Reclassification adjustment for realized (gains)/losses included in net income tax effect1,150444384
Reclassification adjustment for realized (gains)/losses included in net income after tax(1,832)(708)(581)
Net change before tax1,0006,718(4,036)
Net change tax effect(390)(2,585)1,555
Net change after tax6104,133(2,481)
Total Other comprehensive income/(loss) after tax6104,133(2,481)
Accumulated Translation Adjustment [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance(16)(598)8
Cumulative effect of changes in accounting principles0  
Net change269582(606)
Ending Balance253(16)(598)
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Translation before tax4021,139(1,781)
Translation tax effect(139)(398)682
Translation after tax263741(1,099)
Hedges before tax11(259)820
Hedges tax effect(5)100(327)
Hedges after tax6(159)493
Net change before tax413880(961)
Net change tax effect(144)(298)355
Net change after tax269582(606)
Total Other comprehensive income/(loss) after tax269582(606)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance181(202)(802)
Cumulative effect of changes in accounting principles0  
Net change25383600
Ending Balance206181(202)
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Net unrealized gains/(losses) arising during the period before tax247767584
Net unrealized gains/(losses) arising during the period tax effect(96)(308)(226)
Net unrealized gains/(losses) arising during the period after tax151459358
Reclassification adjustment for realized (gains)/losses included in net income before tax(206)(124)402
Reclassification adjustment for realized (gains)/losses included in net income tax effect8048(160)
Reclassification adjustment for realized (gains)/losses included in net income after tax(126)(76)242
Net change before tax41643986
Net change tax effect(16)(260)(386)
Net change after tax25383600
Total Other comprehensive income/(loss) after tax25383600
Accumulated Defined Benefit Plans Adjustment [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance(2,288)(2,786)(503)
Cumulative effect of changes in accounting principles0  
Net change332498(2,283)
Ending Balance(1,956)(2,288)(2,786)
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Net gains/(losses) and prior service credits arising during the period before tax294494(3,579)
Net gains/(losses) and prior service credits arising during the period tax effect(96)(200)1,289
Net gains/(losses) and prior service credits arising during the period after tax198294(2,290)
Reclassification adjustment for net loss and prior service credits included in net income before tax22433714
Reclassification adjustment for net loss and prior service credits included in net income tax effect(90)(133)(7)
Reclassification adjustment for net loss and prior service credits included in net income after tax1342047
Net change before tax518831(3,565)
Net change tax effect(186)(333)1,282
Net change after tax332498(2,283)
Total Other comprehensive income/(loss) after tax332498(2,283)
Accumulated other comprehensive income/(loss)
   
Accumulated other comprehensive income/(loss) [Abstract]   
Beginning Balance(91)(5,687)(917)
Cumulative effect of changes in accounting principles(144)  
Net change1,2365,596(4,770)
Ending Balance1,001(91)(5,687)
Changes of the components of Accumulated Other Comprehensive Income (Loss)   
Total Other comprehensive income/(loss) after tax1,2365,596(4,770)
Variable Interest Entity, Primary Beneficiary [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Cumulative effect of changes in accounting principles(129)  
Derivative receivables [Member]
   
Accumulated other comprehensive income/(loss) [Abstract]   
Cumulative effect of changes in accounting principles$ (15)