INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 6	[1]	$ 3	[1]
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	6		3
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	2		3
Banks/financial Institutions
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 4		$ 0

[1] Includes $6 and $3 for the three-month periods ended March 31, 2015 and 2014, respectively, from change in intent to sell securities