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, 2014		Jun. 30, 2014	Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized	$ 0	[1]	$ (28)	$ (10)	[1]	$ (31)	[1]	$ (65)	[1]
Derivative gains (losses)	(17)			(41)		(67)		157
Other	0			1		(1)		10
Total realized investment gains (losses)	16			22		72		379
Fixed maturities:
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	33			62		140		215
Perpetual securities:
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)	0			0		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)	(17)			(40)		(68)		167
Available-for-sale Securities | Fixed maturities:
Gain (Loss) on Investments [Line Items]
Gross gains from sales	17			92		144		284
Gross losses from sales	0			(24)		(1)		(30)
Net gains (losses) from redemptions	16			4		27		25
Other-than-temporary impairment losses realized	0			(10)		(31)		(64)
Available-for-sale Securities | Perpetual securities:
Gain (Loss) on Investments [Line Items]
Gross losses from sales	0			0		0		(2)
Held-to-maturity Securities | Fixed maturities:
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions	$ 0			$ 0		$ 1		$ 0

[1] Includes $0 and $1 for the nine-month periods ended September 30, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value; $0 and $10 for the three-month periods and $31 and $64 for the nine-month periods ended September 30, 2014 and 2013, respectively, from change in intent to sell securities