INVESTMENTS (Details 4) (USD $)
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12 Months Ended | 3 Months Ended | |||||||||||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Mar. 31, 2011
Reclassification of debt securities from held-to-maturity to trading account assets
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Dec. 31, 2011
Reclassification of debt securities from held-to-maturity to trading account assets
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Dec. 31, 2012
Mortgage-backed securities
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Dec. 31, 2011
Mortgage-backed securities
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Dec. 31, 2012
Prime
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Dec. 31, 2011
Prime
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Dec. 31, 2012
Alt-A
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Dec. 31, 2011
Alt-A
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Dec. 31, 2012
Subprime
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Dec. 31, 2011
Subprime
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Dec. 31, 2012
Non-U.S. residential
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Dec. 31, 2011
Non-U.S. residential
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Dec. 31, 2012
Commercial
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Dec. 31, 2011
Commercial
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Dec. 31, 2012
State and municipal securities
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Dec. 31, 2011
State and municipal securities
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Dec. 31, 2012
Foreign government
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Dec. 31, 2012
Foreign government
Held-to-maturity
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Dec. 31, 2012
Corporate
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Dec. 31, 2011
Corporate
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Dec. 31, 2012
Asset-backed securities
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Dec. 31, 2011
Asset-backed securities
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Schedule of Held-to-maturity Securities | |||||||||||||||||||||||||
Investment reclassified from investments held-to-maturity to trading account assets | $ 10,000,000,000 | ||||||||||||||||||||||||
Investment reclassified from investments held-to-maturity to trading account assets subsequently sold substantially | 12,700,000,000 | ||||||||||||||||||||||||
Investments held-to-maturity sold | 2,110,000,000 | 1,612,000,000 | 413,000,000 | 2,700,000,000 | |||||||||||||||||||||
Net pretax loss recognized in the consolidated statement of income | 187,000,000 | 299,000,000 | 49,000,000 | 709,000,000 | |||||||||||||||||||||
After tax loss recognized in the consolidated statement of income | 427,000,000 | ||||||||||||||||||||||||
Gross unrealized gains included in other revenue | 311,000,000 | ||||||||||||||||||||||||
Gross unrealized losses included in other-than-temporary-impairment losses on investments | 1,387,000,000 | ||||||||||||||||||||||||
Net realized gains included in realized gains (losses) on sales of investments | 367,000,000 | ||||||||||||||||||||||||
After tax unrealized losses reflected in AOCI | 1,012,000,000 | ||||||||||||||||||||||||
Debt Securities Held-to-maturity | |||||||||||||||||||||||||
Amortized cost | 11,662,000,000 | 13,759,000,000 | 6,039,000,000 | 9,475,000,000 | 258,000,000 | 360,000,000 | 2,969,000,000 | 4,732,000,000 | 201,000,000 | 383,000,000 | 2,488,000,000 | 3,487,000,000 | 123,000,000 | 513,000,000 | 1,278,000,000 | 1,422,000,000 | 2,987,000,000 | 829,000,000 | 1,862,000,000 | 529,000,000 | 1,000,000,000 | ||||
Net unrealized loss recognized in AOCI | 1,532,000,000 | 2,276,000,000 | 1,656,000,000 | 1,330,000,000 | 2,045,000,000 | 49,000,000 | 73,000,000 | 837,000,000 | 1,404,000,000 | 43,000,000 | 47,000,000 | 401,000,000 | 520,000,000 | 1,000,000 | 73,000,000 | 95,000,000 | 103,000,000 | 113,000,000 | 26,000,000 | 23,000,000 | |||||
Carrying value | 10,130,000,000 | 11,483,000,000 | 4,709,000,000 | 7,430,000,000 | 209,000,000 | 287,000,000 | 2,132,000,000 | 3,328,000,000 | 158,000,000 | 336,000,000 | 2,087,000,000 | 2,967,000,000 | 123,000,000 | 512,000,000 | 1,205,000,000 | 1,327,000,000 | 2,987,000,000 | 726,000,000 | 1,749,000,000 | 503,000,000 | 977,000,000 | ||||
Gross unrecognized gains | 917,000,000 | 182,000,000 | 747,000,000 | 105,000,000 | 30,000,000 | 21,000,000 | 653,000,000 | 20,000,000 | 13,000,000 | 1,000,000 | 50,000,000 | 59,000,000 | 1,000,000 | 4,000,000 | 89,000,000 | 68,000,000 | 73,000,000 | 8,000,000 | 9,000,000 | ||||||
Gross unrecognized losses | 403,000,000 | 1,165,000,000 | 358,000,000 | 752,000,000 | 4,000,000 | 20,000,000 | 250,000,000 | 319,000,000 | 21,000,000 | 71,000,000 | 81,000,000 | 290,000,000 | 2,000,000 | 52,000,000 | 37,000,000 | 72,000,000 | 254,000,000 | 8,000,000 | 87,000,000 | ||||||
Fair value | 10,644,000,000 | 10,500,000,000 | 5,098,000,000 | 6,783,000,000 | 235,000,000 | 288,000,000 | 2,535,000,000 | 3,029,000,000 | 150,000,000 | 266,000,000 | 2,056,000,000 | 2,736,000,000 | 122,000,000 | 464,000,000 | 1,257,000,000 | 1,323,000,000 | 2,987,000,000 | 799,000,000 | 1,495,000,000 | 503,000,000 | 899,000,000 | ||||
Mexican Government bonds purchased | $ 2,600,000,000 |