REINSURANCE Effect of Reinsurance on Premiums and Benefits and Claims (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reinsurance Disclosures [Abstract]
Earned premiums, direct		$ 13,562	$ 14,318	$ 15,025
Earned premiums, ceded		(284)	(404)	(419)
Earned premiums, assumed		162	209	295
Net earned premiums	[1]	13,440	14,123	14,901
Benefits and claims, excluding reserve remeasurement, direct		8,098	8,599	9,171
Benefits and claims, excluding reserve remeasurement, ceded		(153)	(147)	(322)
Benefits and claims, excluding reserve remeasurement, assumed		63	142	253
Benefits and claims, excluding reserve remeasurement		8,008	8,594	9,102
Reserve remeasurement (gains) losses, direct		(558)	(394)	(196)
Reserve remeasurement (gains) losses, ceded		0	11	(19)
Reserve remeasurement (gains) losses		(558)	(383)	(215)
Total benefits and claims, net		$ 7,450	$ 8,211	$ 8,887

[1] Includes a gain (loss) of $(81), $20 and $(42) in 2024, 2023 and 2022, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.