FAIR VALUE MEASUREMENTS (Details 7) (Level 3, USD $)	12 Months Ended
	Dec. 31, 2012
Corporate debt | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	775,000,000
Corporate debt | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	0.08%
Corporate debt | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	6.55%
Corporate debt | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	3.31%
Residential mortgage backed securities | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	10,650,000,000
Residential mortgage backed securities | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	2.23%
Constant prepayment rate	0.00%
Loss severity	43.70%
Constant default rate	4.21%
Residential mortgage backed securities | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	9.42%
Constant prepayment rate	10.76%
Loss severity	78.72%
Constant default rate	13.30%
Residential mortgage backed securities | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	5.82%
Constant prepayment rate	5.03%
Loss severity	61.21%
Constant default rate	8.75%
Certain CDO/ABS | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	7,844,000,000
Portion of total for which yield is the only input available	6,600,000,000
Certain CDO/ABS | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	5.41%
Constant prepayment rate	0.00%
Loss severity	0.00%
Constant default rate	0.00%
Certain CDO/ABS | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	10.67%
Constant prepayment rate	32.25%
Loss severity	29.38%
Constant default rate	4.05%
Certain CDO/ABS | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	8.04%
Constant prepayment rate	11.82%
Loss severity	6.36%
Constant default rate	1.18%
Commercial mortgage backed securities | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	3,251,000,000
Commercial mortgage backed securities | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	0.00%
Commercial mortgage backed securities | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	19.95%
Commercial mortgage backed securities | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	7.76%
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET)
Fair value inputs, assets, quantitative information
Fair Value	1,205,000,000
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Minimum
Fair value inputs, assets, quantitative information
Recovery rates	3.00%
Diversity score	4
Weighted average life	1 year 3 months 7 days
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Maximum
Fair value inputs, assets, quantitative information
Recovery rates	63.00%
Diversity score	44
Weighted average life	9 years 1 month 10 days
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Weighted-average
Fair value inputs, assets, quantitative information
Recovery rates	27.00%
Diversity score	13
Weighted average life	4 years 10 months 28 days