INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	[1]	$ 22	$ 137	$ 69	$ 143
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		22	6	69	12
Credit related impairment
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net			131		131
Perpetual securities
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		0	0	2	0
Corporate bonds
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		1	5	22	7
Banks/financial institutions
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		0	131	0	135
Equity securities
Gain (Loss) on Investments [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net		$ 21	$ 1	$ 45	$ 1

[1] Includes $22 and $6 for the three-month periods and $69 and $12 for the nine-month periods ended September 30, 2016 and 2015, respectively, from change in intent to sell securities or change in intent to hold securities until recovery; and $131 for the three- and nine-month periods ended September 30, 2015, for credit-related impairments