SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ (6,429)	$ (8,411)	$ 8,934
Other comprehensive income loss before reclassifications net of tax	1,036	2,317	1,216
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(127)	(335)	9
Other comprehensive income (loss), net of tax	909	1,982	1,225
Balance, end of period	(5,520)	(6,429)	(8,411)
Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(18,570)
Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(9,636)
Unrealized Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(3,564)	(1,985)	(1,109)
Other comprehensive income loss before reclassifications net of tax	(505)	(1,579)	(876)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0
Other comprehensive income (loss), net of tax	(505)	(1,579)	(876)
Balance, end of period	(4,069)	(3,564)	(1,985)
Unrealized Foreign Currency Translation Gains (Losses) | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			0
Unrealized Foreign Currency Translation Gains (Losses) | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(1,109)
Unrealized Gains (Losses) on Fixed Maturity Securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(702)	9,602	10,361
Other comprehensive income loss before reclassifications net of tax	1,972	(9,946)	(735)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(131)	(358)	(24)
Other comprehensive income (loss), net of tax	1,841	(10,304)	(759)
Balance, end of period	1,139	(702)	9,602
Unrealized Gains (Losses) on Fixed Maturity Securities | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			0
Unrealized Gains (Losses) on Fixed Maturity Securities | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			10,361
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(27)	(30)	(34)
Other comprehensive income loss before reclassifications net of tax	1	(1)	(1)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	4	4	5
Other comprehensive income (loss), net of tax	5	3	4
Balance, end of period	(22)	(27)	(30)
Unrealized Gains (Losses) on Derivatives | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			0
Unrealized Gains (Losses) on Derivatives | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(34)
Effect of Changes in Discount Rate Assumptions
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(2,100)	(15,832)	0
Other comprehensive income loss before reclassifications net of tax	(460)	13,732	2,738
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0
Other comprehensive income (loss), net of tax	(460)	13,732	2,738
Balance, end of period	(2,560)	(2,100)	(15,832)
Effect of Changes in Discount Rate Assumptions | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(18,570)
Effect of Changes in Discount Rate Assumptions | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(18,570)
Pension Liability Adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(36)	(166)	(284)
Other comprehensive income loss before reclassifications net of tax	28	111	90
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	19	28
Other comprehensive income (loss), net of tax	28	130	118
Balance, end of period	$ (8)	$ (36)	(166)
Pension Liability Adjustment | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			0
Pension Liability Adjustment | Accounting Standards Update 2018-12 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			$ (284)