INVESTMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Mortgage-backed securities
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	$ 26,195	$ 8,808
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	696	138
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	563	500
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	23	28
Total fair value of available for sale securities that have been in an unrealized loss position	26,758	9,308
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	719	166
U.S. government-sponsored agency guaranteed
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	24,792	8,759
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	683	138
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	539	464
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	22	25
Total fair value of available for sale securities that have been in an unrealized loss position	25,331	9,223
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	705	163
Prime
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	6	15
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	4	5
Total fair value of available for sale securities that have been in an unrealized loss position	10	20
Non-U.S. residential
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	1,248	5
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	5
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	11	7
Total fair value of available for sale securities that have been in an unrealized loss position	1,259	12
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	5
Commercial
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	149	29
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	8
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	9	24
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	1	3
Total fair value of available for sale securities that have been in an unrealized loss position	158	53
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	9	3
U.S. Treasury and federal agency securities
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	34,768	10,375
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	224	15
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	105	105
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	5	5
Total fair value of available for sale securities that have been in an unrealized loss position	34,873	10,480
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	229	20
U.S. Treasury
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	26,193	9,374
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	133	11
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	105	105
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	5	5
Total fair value of available for sale securities that have been in an unrealized loss position	26,298	9,479
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	138	16
Agency obligations
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	8,575	1,001
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	91	4
Total fair value of available for sale securities that have been in an unrealized loss position	8,575	1,001
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	91	4
State and municipal securities
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	1,005	10
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	104
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	10,832	11,095
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	1,835	1,820
Total fair value of available for sale securities that have been in an unrealized loss position	11,837	11,105
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	1,939	1,820
Foreign government
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	38,893	24,235
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	433	78
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	3,534	3,910
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	75	76
Total fair value of available for sale securities that have been in an unrealized loss position	42,427	28,145
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	508	154
Corporate
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	4,257	1,420
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	101	8
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	124	225
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	5	18
Total fair value of available for sale securities that have been in an unrealized loss position	4,381	1,645
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	106	26
Asset-backed securities
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	6,720	1,942
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	75	4
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	747	2,888
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	46	139
Total fair value of available for sale securities that have been in an unrealized loss position	7,467	4,830
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	121	143
Marketable equity securities AFS
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	20	15
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	1	1
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	753	764
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	147	144
Total fair value of available for sale securities that have been in an unrealized loss position	773	779
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	148	145
Total securities AFS
Available for Sale Securities Continuous Unrealized Loss Position
Fair value of available for sale securities that have been in an unrealized loss position for less than twelve months	111,858	46,805
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	1,634	244
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	16,658	19,487
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,136	2,230
Total fair value of available for sale securities that have been in an unrealized loss position	128,516	66,292
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	$ 3,770	$ 2,474