INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	$ (10)	[1]	$ (97)	[1]	$ (65)	[1]	$ (643)	[1]
Derivative gains (losses)	(41)		95		157		108
Other	1		0		10		0
Total realized investment gains (losses)	22		286		379		(177)
Fixed Maturities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	62		242		215		(86)
Fixed Maturities | Available-for-sale Securities
Gain (Loss) on Investments [Line Items]
Gross gains from sales	92		313		284		346
Gross losses from sales	(24)		(1)		(30)		(37)
Net gains (losses) from redemptions	4		0		25		2
Other-than-temporary impairment losses realized	(10)		(70)		(64)		(400)
Fixed Maturities | Held-to-maturity Securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions	0		0		0		3
Perpetual Securities
Gain (Loss) on Investments [Line Items]
Gross gains from sales	0		12		0		82
Gross losses from sales	0		(36)		(2)		(98)
Net gains (losses) from redemptions	0		0		0		60
Other-than-temporary impairment losses realized	0		(27)		0		(243)
Total realized investment gains (losses)	0		(51)		(2)		(199)
Equity Securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	0		0		(1)		0
Total realized investment gains (losses)	0		0		(1)		0
Derivatives and other
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	$ (40)		$ 95		$ 167		$ 108

[1] Includes $0 and $70 for the three-month periods and $0 and $365 for the nine-month periods ended September 30, 2013 and 2012, respectively, for credit-related impairments; $0 and $27 for the three-month periods and $1 and $27 for the nine-month periods ended September 30, 2013 and 2012, respectively, for impairments due to severity and duration of decline in fair value; and $10 and $0 for the three-month periods and $64 and $251 for the nine-month periods ended September 30, 2013 and 2012, respectively, from change in intent to sell securities