INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (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	$ 0	[1]	$ 28	$ 10	[1]	$ 31	[1]	$ 65	[1]
Severity and duration of decline in fair value impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses						0		1
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0			10		31		64
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0			3		31		41
Sovereign and supranational
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0			7		0		23
Equity securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 0			$ 0		$ 0		$ 1

[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