FAIR VALUE MEASUREMENTS (Details 5) (Level 3, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Corporate debt | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	796
Corporate debt | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	2.81%
Corporate debt | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	9.59%
Corporate debt | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	6.20%
Residential mortgage backed securities | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	11,241
Residential mortgage backed securities | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	2.18%
Constant prepayment rate	0.00%
Loss severity	41.70%
Constant default rate	4.04%
Residential mortgage backed securities | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	7.66%
Constant prepayment rate	10.34%
Loss severity	79.63%
Constant default rate	13.20%
Residential mortgage backed securities | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	4.92%
Constant prepayment rate	4.84%
Loss severity	60.66%
Constant default rate	8.62%
Certain CDO/ABS | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	5,869
Portion of total for which yield is the only input available	297
Certain CDO/ABS | Discounted cash flow | Minimum
Fair value inputs, assets, quantitative information
Yield	7.04%
Constant prepayment rate	4.08%
Loss severity	56.61%
Constant default rate	6.42%
Certain CDO/ABS | Discounted cash flow | Maximum
Fair value inputs, assets, quantitative information
Yield	10.52%
Constant prepayment rate	7.78%
Loss severity	67.23%
Constant default rate	14.10%
Certain CDO/ABS | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	8.78%
Constant prepayment rate	5.93%
Loss severity	61.93%
Constant default rate	10.41%
Commercial mortgage backed securities | Discounted cash flow
Fair value inputs, assets, quantitative information
Fair Value	3,948
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	17.12%
Commercial mortgage backed securities | Discounted cash flow | Weighted-average
Fair value inputs, assets, quantitative information
Yield	6.92%
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET)
Fair value inputs, assets, quantitative information
Fair Value	997
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Minimum
Fair value inputs, assets, quantitative information
Recovery rates	4.00%
Diversity score	4
Weighted average life	1 year 3 months 11 days
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Maximum
Fair value inputs, assets, quantitative information
Recovery rates	63.00%
Diversity score	42
Weighted average life	9 years 9 months 4 days
CDO/ABS - Direct Investment book | Binomial Expansion Technique (BET) | Weighted-average
Fair value inputs, assets, quantitative information
Recovery rates	27.00%
Diversity score	14
Weighted average life	4 years 11 months 26 days