INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	$ 0	[1]	$ (343)	[1]	$ (55)	[1]	$ (546)	[1]
Derivative gains (losses)	111		(67)		198		13
Other	4		0		9		0
Total realized investment gains (losses)	201		(418)		357		(463)
Fixed Maturities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	88		(278)		153		(328)
Fixed Maturities | Available-for-sale Securities
Gain (Loss) on Investments [Line Items]
Gross gains from sales	73		19		192		33
Gross losses from sales	0		(35)		(6)		(36)
Net gains (losses) from redemptions	15		2		21		2
Other-than-temporary impairment losses realized	0		(267)		(54)		(330)
Fixed Maturities | Held-to-maturity Securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions	0		3		0		3
Perpetual Securities
Gain (Loss) on Investments [Line Items]
Gross gains from sales	0		0		0		70
Gross losses from sales	(2)		3		(2)		(62)
Net gains (losses) from redemptions	0		0		0		60
Other-than-temporary impairment losses realized	0		(76)		0		(216)
Total realized investment gains (losses)	(2)		(73)		(2)		(148)
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)	$ 115		$ (67)		$ 207		$ 13

[1] Includes $0 and $267 for the three-month periods and $0 and $295 for the six-month periods ended June 30, 2013 and 2012, respectively, for credit-related impairments; $0 for the three-month period and $1 for the six-month period ended June 30, 2013 for impairments due to severity and duration of decline in fair value; and $0 and $76 for the three-month periods and $54 and $251 for the six-month periods ended June 30, 2013 and 2012, respectively, from change in intent to sell securities