DERIVATIVE INSTRUMENTS - Components of Gain or Loss on Derivatives that Qualified as Cash Flow Hedges (Detail) (Cash flow hedges, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	$ (22)	$ (33)	$ 51
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)	(3)	0	20
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	0	2	1
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)	0	0	0
Foreign currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	(22)	(35)	50
Net Realized Investment Gains (Losses) Recognized in Income on Derivative (Ineffective Portion)	$ (3)	$ 0	$ 20