INVESTMENTS (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Available-for-sale Securities, Debt Maturities
Total amortized cost	$ 294,635		$ 284,735
Total fair value	294,692		282,777
Mortgage-backed securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	63	[1]	87	[1]
After 1 but within 5 years, amortized cost	593	[1]	346	[1]
After 5 but within 10 years, amortized cost	1,932	[1]	2,898	[1]
After 10 years, amortized cost	43,843	[1],[2]	49,723	[1],[2]
Total amortized cost	46,431	[1]	53,054	[1]
Fair value, due within 1 year	63	[1]	87	[1]
Fair value, after 1 but within 5 years	599	[1]	354	[1]
Fair value, after 5 but within 10 years	1,957	[1]	2,932	[1]
Fair value, after 10 years	44,103	[1],[2]	49,282	[1],[2]
Total fair value	46,722	[1]	52,655	[1]
U.S. Treasury and federal agency securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	13,172		15,789
After 1 but within 5 years, amortized cost	93,519		66,232
After 5 but within 10 years, amortized cost	2,301		2,129
After 10 years, amortized cost	2,696	[2]	3,061	[2]
Total amortized cost	111,688		87,211
Fair value, due within 1 year	13,198		15,853
Fair value, after 1 but within 5 years	93,588		66,457
Fair value, after 5 but within 10 years	2,321		2,185
Fair value, after 10 years	2,779	[2]	3,101	[2]
Total fair value	111,886		87,596
State and municipal securities
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	307		576
After 1 but within 5 years, amortized cost	3,878		3,731
After 5 but within 10 years, amortized cost	530		439
After 10 years, amortized cost	9,179	[2]	16,015	[2]
Total amortized cost	13,894		20,761
Fair value, due within 1 year	300		581
Fair value, after 1 but within 5 years	3,803		3,735
Fair value, after 5 but within 10 years	546		482
Fair value, after 10 years	8,264	[2]	14,142	[2]
Total fair value	12,913		18,940
Foreign government
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	36,864		37,005
After 1 but within 5 years, amortized cost	42,217		51,344
After 5 but within 10 years, amortized cost	15,207		7,314
After 10 years, amortized cost	1,026	[2]	945	[2]
Total amortized cost	95,314		96,608
Fair value, due within 1 year	36,881		36,959
Fair value, after 1 but within 5 years	42,326		51,304
Fair value, after 5 but within 10 years	15,356		7,216
Fair value, after 10 years	1,097	[2]	992	[2]
Total fair value	95,660		96,471
All other
Available-for-sale Securities, Debt Maturities
Due within 1 year, amortized cost	1,585	[3]	2,786	[3]
After 1 but within 5 years, amortized cost	12,016	[3]	10,934	[3]
After 5 but within 10 years, amortized cost	7,053	[3]	5,632	[3]
After 10 years, amortized cost	6,654	[2],[3]	7,749	[2],[3]
Total amortized cost	27,308	[3]	27,101	[3]
Fair value, due within 1 year	1,589	[3]	2,733	[3]
Fair value, after 1 but within 5 years	12,181	[3]	11,020	[3]
Fair value, after 5 but within 10 years	7,099	[3]	5,641	[3]
Fair value, after 10 years	6,642	[2],[3]	7,721	[2],[3]
Total fair value	$ 27,511	[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.