Annual report pursuant to Section 13 and 15(d)

Income Taxes - Effective Income Tax Rate Reconciliation (Details)

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Income Taxes - Effective Income Tax Rate Reconciliation (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Amount                      
U.S. federal income tax at statutory rate, amount                 $ (790,000,000) $ (1,607,000,000) $ 1,409,000,000
U.S. state and local income taxes, net of federal effect, amount                 (381,000,000) (292,000,000) 329,000,000
Change in federal and non-U.S. valuation allowance, amount                 41,000,000 (1,102,000,000) (1,657,000,000)
Subsidiary sales and liquidations, amount                 0 (593,000,000) 0
Change In prior period UTBs (including interest)                 (135,000,000) (102,000,000) 31,000,000
Tax exempt income, including dividends, amount                 (103,000,000) (96,000,000) (375,000,000)
Non-deductible U.K. bank payroll tax, amount                 0 0 87,000,000
Non-U.S. statutory rate reductions, amount                 781,000,000 [1] 845,000,000 [1] 386,000,000 [1]
Non-U.S. tax differential, amount                 (1,908,000,000) [2] (20,000,000) (75,000,000)
Other, amount                 (53,000,000) 23,000,000 13,000,000
Income tax (benefit) expense (1,813,000,000) 246,000,000 (770,000,000) (211,000,000) (1,606,000,000) (537,000,000) (1,020,000,000) 219,000,000 (2,548,000,000) (2,944,000,000) 148,000,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Percent                      
U.S. federal income tax at statutory rate, percent                 35.00% 35.00% 35.00%
U.S. state and local income taxes, net of federal effect, percent                 16.90% 6.40% 8.20%
Change in federal and non-U.S. valuation allowance, percent                 (1.80%) 24.00% (41.10%)
Subsidiary sales and liquidations, percent                 0.00% 12.90% 0.00%
Change in prior period UTBs (including interest), percent                 6.00% 2.20% 0.80%
Tax exempt income, including dividends, percent                 4.60% 2.10% (9.30%)
Non-deductible U.K. bank payroll tax, percent                 0.00% 0.00% 2.20%
Non-U.S. statutory rate reductions, percent                 (34.60%) [1] (18.40%) [1] 9.60% [1]
Non-U.S. tax differential, percent                 84.50% [2] 0.40% (1.90%)
Other, percent                 2.20% (0.50%) 0.20%
Income tax (benefit) expense, percent                 112.80% 64.10% 3.70%
Income Tax Reconciliation, Tax Credits, Foreign                 1,700,000,000    
United Kingdom
                      
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation, Amount                      
Non-U.S. statutory rate reductions, amount                 $ 781,000,000 [1] $ 774,000,000 [1] $ 386,000,000 [1]
[1] Includes charges of $781 million, $774 million, and $386 million in 2012, 2011 and 2010, respectively, to reduce the carrying value of certain U.K. net deferred tax assets due to U.K. corporate income tax rate reductions.
[2] Includes in 2012 a $1.7 billion income tax benefit attributable to the excess of foreign tax credits recognized in the U.S. upon repatriation of the earnings of certain non-U.S. subsidiaries over the related U.S. tax liability.