INVESTMENTS (Details 6) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Total carrying value	$ 14,910	$ 29,107
Held-to-maturity Securities, Debt Maturities, Fair Value;
Total fair value	14,592	29,981
Mortgage-backed securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, carrying value	89	21
After 1 but within 5 years, carrying value	249	321
After 5 but within 10 years, carrying value	428	493
After 10 years, carrying value	9,238	17,664
Total carrying value	10,004	18,499
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	81	23
After 1 but within 5 years, fair value	231	309
After 5 but within 10 years, fair value	401	434
After 10 years, fair value	9,170	18,517
Total fair value	9,883	19,283
State and municipal securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, carrying value	3	12
After 1 but within 5 years, carrying value	41	55
After 5 but within 10 years, carrying value	32	86
After 10 years, carrying value	1,375	2,243
Total carrying value	1,451	2,396
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	3	12
After 1 but within 5 years, fair value	42	55
After 5 but within 10 years, fair value	32	85
After 10 years, fair value	1,303	2,151
Total fair value	1,380	2,303
All Other
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, carrying value	51	351
After 1 but within 5 years, carrying value	357	1,344
After 5 but within 10 years, carrying value	2,039	4,885
After 10 years, carrying value	1,008	1,632
Total carrying value	3,455	8,212
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	53	357
After 1 but within 5 years, fair value	346	1,621
After 5 but within 10 years, fair value	1,916	4,765
After 10 years, fair value	1,014	1,652
Total fair value	$ 3,329	$ 8,395