INVESTMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 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	$ 24,393	$ 8,808
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	533	138
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,310	500
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	81	28
Total fair value of available for sale securities that have been in an unrealized loss position	26,703	9,308
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	614	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	22,185	8,759
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	522	138
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,291	464
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	80	25
Total fair value of available for sale securities that have been in an unrealized loss position	24,476	9,223
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	602	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	3	15
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	3	5
Total fair value of available for sale securities that have been in an unrealized loss position	6	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	2,063	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	6	7
Total fair value of available for sale securities that have been in an unrealized loss position	2,069	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	142	29
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	6
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	10	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	152	53
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	7	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	25,193	10,375
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	126	15
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	510	105
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	13	5
Total fair value of available for sale securities that have been in an unrealized loss position	25,703	10,480
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	139	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	18,185	9,374
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	72	11
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	510	105
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	13	5
Total fair value of available for sale securities that have been in an unrealized loss position	18,695	9,479
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	85	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	7,008	1,001
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	54	4
Total fair value of available for sale securities that have been in an unrealized loss position	7,008	1,001
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	54	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	641	10
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	38
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	11,739	11,095
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	1,987	1,820
Total fair value of available for sale securities that have been in an unrealized loss position	12,380	11,105
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	2,025	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	36,206	24,235
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	519	78
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	3,900	3,910
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	72	76
Total fair value of available for sale securities that have been in an unrealized loss position	40,106	28,145
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	591	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	4,062	1,420
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	99	8
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	270	225
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	7	18
Total fair value of available for sale securities that have been in an unrealized loss position	4,332	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	6,513	1,942
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	81	4
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	758	2,888
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	26	139
Total fair value of available for sale securities that have been in an unrealized loss position	7,271	4,830
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	107	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	101	15
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	6	1
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	833	764
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	118	144
Total fair value of available for sale securities that have been in an unrealized loss position	934	779
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	124	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	97,109	46,805
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	1,402	244
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	20,320	19,487
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,304	2,230
Total fair value of available for sale securities that have been in an unrealized loss position	117,429	66,292
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	$ 3,706	$ 2,474