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, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	$ (28)	[1]	$ 0	[1]	$ (31)	[1]	$ (55)	[1]
Derivative gains (losses)	33		111		(50)		198
Other	0		4		(1)		9
Total realized investment gains (losses)	102		201		56		357
Fixed maturities:
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	69		88		107		153
Perpetual securities:
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	0		(2)		0		(2)
Equity securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	0		0		0		(1)
Total realized investment gains (losses)	0		0		0		(1)
Derivatives and other
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	33		115		(51)		207
Available-for-sale Securities | Fixed maturities:
Gain (Loss) on Investments [Line Items]
Gross gains from sales	92		73		127		192
Gross losses from sales	0		0		(1)		(6)
Net gains (losses) from redemptions	4		15		11		21
Other-than-temporary impairment losses realized	(28)		0		(31)		(54)
Available-for-sale Securities | Perpetual securities:
Gain (Loss) on Investments [Line Items]
Gross losses from sales	0		(2)		0		(2)
Held-to-maturity Securities | Fixed maturities:
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions	$ 1		$ 0		$ 1		$ 0

[1] Includes $0 and $1 for the six-month periods ended June 30, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value; and $28 and $0 for the three-month periods and $31 and $54 for the six-month periods ended June 30, 2014 and 2013, respectively, from change in intent to sell securities