DEFERRED POLICY ACQUISITION COSTS AND INSURANCE EXPENSES - Depreciation and Other Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Policy Acquisition Costs Disclosures [Abstract]
Depreciation expense	$ 50	$ 48	$ 44
Other amortization expense	3	6	6
Total depreciation and other amortization expense	$ 53	$ 54	$ 50