INVESTMENTS (Details 6) (USD $)			3 Months Ended		6 Months Ended		1 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Akbank	Mar. 31, 2012 Akbank	Jun. 30, 2012 Akbank	Mar. 23, 2012 Akbank	Jun. 30, 2012 Morgan Stanley Smith Barney joint venture	Jul. 16, 2012 Morgan Stanley Smith Barney joint venture	Jun. 02, 2012 Morgan Stanley Smith Barney joint venture	Jun. 30, 2012 Morgan Stanley Smith Barney joint venture Morgan Stanley	Jun. 30, 2012 Mortgage-backed securities	Dec. 31, 2011 Mortgage-backed securities	Jun. 30, 2012 State and municipal securities	Dec. 31, 2011 State and municipal securities	Jun. 30, 2012 Foreign government	Jun. 30, 2012 All Other	Dec. 31, 2011 All Other
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, carrying value													$ 6,000,000	$ 4,000,000			$ 21,000,000
After 1 but within 5 years, carrying value											292,000,000	275,000,000	44,000,000	43,000,000	2,746,000,000	608,000,000	470,000,000
After 5 but within 10 years, carrying value											179,000,000	238,000,000	62,000,000	31,000,000		283,000,000	1,404,000,000
After 10 years, carrying value											5,196,000,000	6,917,000,000	1,135,000,000	1,249,000,000		798,000,000	831,000,000
Total carrying value	11,349,000,000	11,483,000,000									5,667,000,000	7,430,000,000	1,247,000,000	1,327,000,000	2,746,000,000	1,689,000,000	2,726,000,000
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value													6,000,000	4,000,000			21,000,000
After 1 but within 5 years, fair value											268,000,000	239,000,000	47,000,000	46,000,000	2,756,000,000	610,000,000	438,000,000
After 5 but within 10 years, fair value											176,000,000	224,000,000	65,000,000	30,000,000		281,000,000	1,182,000,000
After 10 years, fair value											5,044,000,000	6,320,000,000	1,174,000,000	1,243,000,000		756,000,000	753,000,000
Total fair value	11,183,000,000	10,500,000,000									5,488,000,000	6,783,000,000	1,292,000,000	1,323,000,000	2,756,000,000	1,647,000,000	2,394,000,000
Maximum equity method investment ownership percentage						10.00%
Percentage of ownership interest held			9.90%	20.00%	9.90%		49.00%			51.00%
Ownership interest sold by entity			10.10%				14.00%
Percentage of ownership on the joint venture that is joint venture partner's option to purchase from the entity							49.00%
Impairment charge related to investment, after-tax				763,000,000
Impairment charge related to investment, pre-tax					1,181,000,000
Carrying value of equity method investment							11,000,000,000
Gain (Loss) on sale of equity method investment, pre-tax			(424,000,000)
Gain (Loss) on sale of equity method investment, after-tax			$ (274,000,000)
Minimum percentage of difference on joint venture's total value evaluated by the entity and the joint venture partner for third party appraisal required									10.00%
Joint venture partner's evaluation on the joint venture's total value as percentage on the joint venture's total value evaluated by the entity								40.00%