SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 7,393	$ 8,934	$ 6,615
Other comprehensive income loss before reclassifications net of tax	(11,463)	(1,550)	1,322
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(335)	9	149
Other comprehensive income (loss), net of tax	(11,798)	(1,541)	1,471
Balance, end of period	(4,405)	7,393	8,934
Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			848
Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			7,463
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(2,013)	(1,109)	(1,623)
Other comprehensive income loss before reclassifications net of tax	(1,627)	(904)	514
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0
Other comprehensive income (loss), net of tax	(1,627)	(904)	514
Balance, end of period	(3,640)	(2,013)	(1,109)
Unrealized foreign currency translation gains (losses) | Accounting Standards Update 2019-04 | 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 2019-04 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(1,623)
Unrealized gains (losses) on fixed maturity securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	9,602	10,361	8,548
Other comprehensive income loss before reclassifications net of tax	(9,946)	(735)	839
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(358)	(24)	126
Other comprehensive income (loss), net of tax	(10,304)	(759)	965
Balance, end of period	(702)	9,602	10,361
Unrealized gains (losses) on fixed maturity securities | Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			848
Unrealized gains (losses) on fixed maturity securities | Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			9,396
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(30)	(34)	(33)
Other comprehensive income loss before reclassifications net of tax	(1)	(1)	(1)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	4	5	0
Other comprehensive income (loss), net of tax	3	4	(1)
Balance, end of period	(27)	(30)	(34)
Unrealized gains (losses) on derivatives | Accounting Standards Update 2019-04 | 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 2019-04 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			(33)
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(166)	(284)	(277)
Other comprehensive income loss before reclassifications net of tax	111	90	(30)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	19	28	23
Other comprehensive income (loss), net of tax	130	118	(7)
Balance, end of period	$ (36)	$ (166)	(284)
Pension liability adjustment | Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			0
Pension liability adjustment | Accounting Standards Update 2019-04 | Cumulative effect, period of adoption, adjusted balance
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period			$ (277)