DEFERRED POLICY ACQUISITION COSTS AND INSURANCE EXPENSES - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Policy Acquisition Costs Disclosures [Abstract]
Capitalization of deferred policy acquisition costs	$ 1.2	$ 1.5	$ 1.5
Commissions deferred as a percentage of total acquisition costs	77.00%	74.00%	72.00%
Personnel, compensation and benefit expenses as a percentage of insurance expenses	59.00%	57.00%	54.00%