INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (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	$ 28	[1]	$ 0	[1]	$ 31	[1]	$ 55	[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	28		0		31		54
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	28		0		31		38
Sovereign and supranational
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0		0		0		16
Equity securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 0		$ 0		$ 0		$ 1

[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