FAIR VALUE MEASUREMENTS (Details 8) (Level 3, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Policyholder contract deposits - GMWB
Significant unobservable inputs used for recurring fair value measurements
Fair value	1,257
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	39.00%
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	1,436
Derivative Liabilities - Credit contracts | BET | Minimum
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	3.00%
Diversity score	9
Weighted average life	5 years 1 month 6 days
Derivative Liabilities - Credit contracts | BET | Maximum
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	37.00%
Diversity score	38
Weighted average life	8 years 5 months 12 days
Derivative Liabilities - Credit contracts | BET | Weighted-average
Significant unobservable inputs used for recurring fair value measurements
Recovery rates	17.00%
Diversity score	14
Weighted average life	5 years 9 months