INVESTMENTS (Details 3) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Available-for-sale Securities, Debt Maturities
Total amortized cost	$ 286,077		$ 284,735
Total fair value	286,465		282,777
Mortgage-backed securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	72	[1]	87	[1]
After 1 but within 5 years, amortized cost	468	[1]	346	[1]
After 5 but within 10 years, amortized cost	1,972	[1]	2,898	[1]
After 10 years, amortized cost	44,791	[1],[2]	49,723	[1],[2]
Total amortized cost	47,303	[1]	53,054	[1]
Fair value, due within 1 year	72	[1]	87	[1]
Fair value, after 1 but within 5 years	475	[1]	354	[1]
Fair value, after 5 but within 10 years	2,000	[1]	2,932	[1]
Fair value, after 10 years	45,098	[1],[2]	49,282	[1],[2]
Total fair value	47,645	[1]	52,655	[1]
U.S. Treasury and federal agency securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	11,751		15,789
After 1 but within 5 years, amortized cost	86,111		66,232
After 5 but within 10 years, amortized cost	2,280		2,129
After 10 years, amortized cost	3,171	[2]	3,061	[2]
Total amortized cost	103,313		87,211
Fair value, due within 1 year	11,789		15,853
Fair value, after 1 but within 5 years	86,470		66,457
Fair value, after 5 but within 10 years	2,312		2,185
Fair value, after 10 years	3,241	[2]	3,101	[2]
Total fair value	103,812		87,596
State and municipal securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	208		576
After 1 but within 5 years, amortized cost	3,903		3,731
After 5 but within 10 years, amortized cost	378		439
After 10 years, amortized cost	9,414	[2]	16,015	[2]
Total amortized cost	13,903		20,761
Fair value, due within 1 year	208		581
Fair value, after 1 but within 5 years	3,909		3,735
Fair value, after 5 but within 10 years	485		482
Fair value, after 10 years	8,290	[2]	14,142	[2]
Total fair value	12,892		18,940
Foreign government
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	36,840		37,005
After 1 but within 5 years, amortized cost	44,717		51,344
After 5 but within 10 years, amortized cost	12,833		7,314
After 10 years, amortized cost	1,190	[2]	945	[2]
Total amortized cost	95,580		96,608
Fair value, due within 1 year	36,845		36,959
Fair value, after 1 but within 5 years	44,877		51,304
Fair value, after 5 but within 10 years	12,984		7,216
Fair value, after 10 years	1,274	[2]	992	[2]
Total fair value	95,980		96,471
All other
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	2,911	[3]	2,786	[3]
After 1 but within 5 years, amortized cost	10,034	[3]	10,934	[3]
After 5 but within 10 years, amortized cost	6,213	[3]	5,632	[3]
After 10 years, amortized cost	6,820	[2],[3]	7,749	[2],[3]
Total amortized cost	25,978	[3]	27,101	[3]
Fair value, due within 1 year	2,873	[3]	2,733	[3]
Fair value, after 1 but within 5 years	10,168	[3]	11,020	[3]
Fair value, after 5 but within 10 years	6,290	[3]	5,641	[3]
Fair value, after 10 years	6,805	[2],[3]	7,721	[2],[3]
Total fair value	$ 26,136	[3]	$ 27,115	[3]

[1] Includes mortgage-backed securities of U.S. government-sponsored agencies.

[2] Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment rights.

[3] Includes corporate, asset-backed and other debt securities.