INVESTMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
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	$ 4,457	$ 8,878
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	37	56
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	505	179
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	35	32
Total fair value of available for sale securities that have been in an unrealized loss position	4,962	9,057
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	72	88
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	3,552	5,398
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	32	32
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	355	51
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	27	19
Total fair value of available for sale securities that have been in an unrealized loss position	3,907	5,449
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	59	51
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	27
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months		1
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	39	40
Gross unrealized losses 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	42	67
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	3	6
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	872	3,418
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	4	22
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	82	57
Total fair value of available for sale securities that have been in an unrealized loss position	954	3,475
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	4	22
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	30	35
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	29	31
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	5	8
Total fair value of available for sale securities that have been in an unrealized loss position	59	66
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	6	9
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	12,273	3,523
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	21	2
Total fair value of available for sale securities that have been in an unrealized loss position	12,273	3,523
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	21	2
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	10,556	553
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	20
Total fair value of available for sale securities that have been in an unrealized loss position	10,556	553
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	20
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	1,717	2,970
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	1	2
Total fair value of available for sale securities that have been in an unrealized loss position	1,717	2,970
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	1	2
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	183	59
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	2	2
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	9,202	11,591
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,082	2,552
Total fair value of available for sale securities that have been in an unrealized loss position	9,385	11,650
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	2,084	2,554
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	19,449	33,109
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	92	211
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	5,958	11,205
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	129	193
Total fair value of available for sale securities that have been in an unrealized loss position	25,407	44,314
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	221	404
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	1,585	2,104
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	23	24
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	271	203
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	14	29
Total fair value of available for sale securities that have been in an unrealized loss position	1,856	2,307
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	37	53
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	1,968	4,625
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	5	68
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	1,623	466
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	47	13
Total fair value of available for sale securities that have been in an unrealized loss position	3,591	5,091
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	52	81
Other debt 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		164
Total fair value of available for sale securities that have been in an unrealized loss position		164
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	1,489	47
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	135	5
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	1,181	1,457
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	177	190
Total fair value of available for sale securities that have been in an unrealized loss position	2,670	1,504
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	312	195
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	41,404	52,509
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for less than twelve months	315	368
Fair value of available for sale securities that have been in an unrealized loss position for twelve months or longer	18,740	25,101
Gross unrealized losses of available for sale securities that have been in an unrealized loss position for twelve months or longer	2,484	3,009
Total fair value of available for sale securities that have been in an unrealized loss position	60,144	77,610
Total gross unrealized losses of available for sale securities that have been in an unrealized loss position	$ 2,799	$ 3,377