INVESTMENTS (Details 4) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Mortgage-backed securities	Dec. 31, 2011 Mortgage-backed securities	Sep. 30, 2012 Prime	Dec. 31, 2011 Prime	Sep. 30, 2012 Alt-A	Dec. 31, 2011 Alt-A	Sep. 30, 2012 Subprime	Dec. 31, 2011 Subprime	Sep. 30, 2012 Non-U.S. residential	Dec. 31, 2011 Non-U.S. residential	Sep. 30, 2012 Commercial	Dec. 31, 2011 Commercial	Sep. 30, 2012 State and municipal securities	Dec. 31, 2011 State and municipal securities	Sep. 30, 2012 Foreign government	Jun. 30, 2012 Foreign government Held-to-maturity	Sep. 30, 2012 Corporate	Dec. 31, 2011 Corporate	Sep. 30, 2012 Asset-backed securities	Dec. 31, 2011 Asset-backed securities
Debt Securities Held-to-maturity
Amortized cost	$ 12,625,000,000	$ 13,759,000,000	$ 6,670,000,000	$ 9,475,000,000	$ 298,000,000	$ 360,000,000	$ 3,170,000,000	$ 4,732,000,000	$ 245,000,000	$ 383,000,000	$ 2,649,000,000	$ 3,487,000,000	$ 308,000,000	$ 513,000,000	$ 1,307,000,000	$ 1,422,000,000	$ 2,849,000,000		$ 935,000,000	$ 1,862,000,000	$ 864,000,000	$ 1,000,000,000
Net unrealized loss recognized in AOCI	1,682,000,000	2,276,000,000	1,450,000,000	2,045,000,000	55,000,000	73,000,000	934,000,000	1,404,000,000	42,000,000	47,000,000	418,000,000	520,000,000	1,000,000	1,000,000	84,000,000	95,000,000			117,000,000	113,000,000	31,000,000	23,000,000
Carrying value	10,943,000,000	11,483,000,000	5,220,000,000	7,430,000,000	243,000,000	287,000,000	2,236,000,000	3,328,000,000	203,000,000	336,000,000	2,231,000,000	2,967,000,000	307,000,000	512,000,000	1,223,000,000	1,327,000,000	2,849,000,000		818,000,000	1,749,000,000	833,000,000	977,000,000
Gross unrecognized gains	840,000,000	182,000,000	596,000,000	105,000,000	24,000,000	21,000,000	508,000,000	20,000,000	11,000,000	1,000,000	53,000,000	59,000,000		4,000,000	176,000,000	68,000,000	7,000,000		53,000,000		8,000,000	9,000,000
Gross unrecognized losses	526,000,000	1,165,000,000	430,000,000	752,000,000	13,000,000	20,000,000	223,000,000	319,000,000	24,000,000	71,000,000	165,000,000	290,000,000	5,000,000	52,000,000	34,000,000	72,000,000	1,000,000			254,000,000	61,000,000	87,000,000
Fair value	11,257,000,000	10,500,000,000	5,386,000,000	6,783,000,000	254,000,000	288,000,000	2,521,000,000	3,029,000,000	190,000,000	266,000,000	2,119,000,000	2,736,000,000	302,000,000	464,000,000	1,365,000,000	1,323,000,000	2,855,000,000		871,000,000	1,495,000,000	780,000,000	899,000,000
AOCI, other than temporary impairment, not credit loss, held to maturity securities	1,700,000,000	2,300,000,000
Mexican Government bonds purchased																		$ 2,600,000,000