INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses	[1]	$ 33	$ 0	$ 47	$ 6
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses		33		47	6
Perpetual securities
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses		0	0	2	0
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses		9	0	21	2
Banks/financial institutions
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses		0	0	0	4
Equity securities
Gain (Loss) on Investments [Line Items]
Other than temporary impairment losses		$ 24	$ 0	$ 24	$ 0

[1] Includes $33 and an immaterial amount for the three-month periods and $47 and $6 for the six-month periods ended June 30, 2016 and 2015, respectively, from change in intent to sell securities or change in intent to hold securities until recovery