INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2015 USD ($) investment	Mar. 31, 2015 investment	Jun. 30, 2014 USD ($) investment	Mar. 31, 2014 investment	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	[1]	$ 0		$ 28		$ 6	$ 31
Other-than-temporary impairment losses | investment		0	0	1	1
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		$ 0		$ 28		6	31
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		0		28		2	31
Banks/financial institutions
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		$ 0		$ 0		$ 4	$ 0

[1] Includes an immaterial amount and $28 for the three-month periods and $6 and $31 for the six-month periods ended June 30, 2015 and 2014, respectively, from change in intent to sell securities