SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ (5,102)	$ (7,278)	$ (5,520)	$ (6,429)
Other comprehensive income (loss) before reclassifications net of tax	1,849	(41)	2,399	(845)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(39)	(19)	(171)	(64)
Other comprehensive income (loss), net of tax	1,810	(60)	2,228	(909)
Balance, end of period	(3,292)	(7,338)	(3,292)	(7,338)
Unrealized Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(4,666)	(3,618)	(4,069)	(3,564)
Other comprehensive income (loss) before reclassifications net of tax	(425)	(631)	(1,022)	(685)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0	0
Other comprehensive income (loss), net of tax	(425)	(631)	(1,022)	(685)
Balance, end of period	(5,091)	(4,249)	(5,091)	(4,249)
Unrealized Gains (Losses) on Fixed Maturity Securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,092	1,289	1,139	(702)
Other comprehensive income (loss) before reclassifications net of tax	(652)	710	(566)	2,746
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(39)	(21)	(172)	(66)
Other comprehensive income (loss), net of tax	(691)	689	(738)	2,680
Balance, end of period	401	1,978	401	1,978
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(26)	(26)	(22)	(27)
Other comprehensive income (loss) before reclassifications net of tax	3	0	(2)	1
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	1	1	2	1
Other comprehensive income (loss), net of tax	4	1	0	2
Balance, end of period	(22)	(25)	(22)	(25)
Effect of Changes in Discount Rate Assumptions
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(1,495)	(4,894)	(2,560)	(2,100)
Other comprehensive income (loss) before reclassifications net of tax	2,920	(165)	3,985	(2,959)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0	0
Other comprehensive income (loss), net of tax	2,920	(165)	3,985	(2,959)
Balance, end of period	1,425	(5,059)	1,425	(5,059)
Pension Liability Adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(7)	(29)	(8)	(36)
Other comprehensive income (loss) before reclassifications net of tax	3	45	4	52
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(1)	1	(1)	1
Other comprehensive income (loss), net of tax	2	46	3	53
Balance, end of period	$ (5)	$ 17	$ (5)	$ 17