FAIR VALUE MEASUREMENTS (Details 7) (Level 3, USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Policyholder contract deposits - GMWB
Significant unobservable inputs used for recurring fair value measurements
Fair value	893
Policyholder contract deposits - GMWB | Discounted cash flow | Minimum
Significant unobservable inputs used for recurring fair value measurements
Equity implied volatility	6.00%
Base lapse rates	1.00%
Dynamic lapse rates	0.20%
Mortality rates	0.50%
Utilization rates	0.50%
Policyholder contract deposits - GMWB | Discounted cash flow | Maximum
Significant unobservable inputs used for recurring fair value measurements
Equity implied volatility	40.00%
Base lapse rates	40.00%
Dynamic lapse rates	60.00%
Mortality rates	40.00%
Utilization rates	25.00%
Derivative Liabilities - Credit contracts
Significant unobservable inputs used for recurring fair value measurements
Fair value	1,787
Derivative Liabilities - Credit contracts | BET | Minimum
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	3.00%
Diversity score	7
Weighted average life	5 years 29 days
Derivative Liabilities - Credit contracts | BET | Maximum
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	36.00%
Diversity score	31
Weighted average life	9 years 2 months 8 days
Derivative Liabilities - Credit contracts | BET | Weighted-average
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	32.00%
Diversity score	15
Weighted average life	4 years 6 months 22 days