INCOME TAXES - Principal Components of Net Deferred Tax Balances (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Compensation and other accrued expense	$ 89	$ 138
Benefits payable	79	113
Investment securities	44	0
Net operating loss carryforward	38	53
Capital loss carryforward	15	0
Deferred acquisition costs	17	48
Unearned revenues	9	12
Other	8	1
Future policy benefits payable	0	231
Total deferred income tax assets	299	596
Valuation allowance	(54)	(49)
Total deferred income tax assets, net of valuation allowance	245	547
Depreciable property and intangible assets	(273)	(237)
Prepaid expenses	(52)	(44)
Future policy benefits payable	(5)	0
Investment securities	0	(49)
Total deferred income tax liabilities	(330)	(330)
Total net deferred income tax assets/(liabilities)	$ (85)
Total net deferred income tax assets/(liabilities)		$ 217