SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ (3,292)	$ (7,338)	$ (5,520)	$ (6,429)
Other comprehensive income (loss) before reclassifications net of tax	(344)	1,609	2,056	764
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(41)	(31)	(213)	(95)
Other comprehensive income (loss), net of tax	(385)	1,578	1,843	669
Balance, end of period	(3,677)	(5,760)	(3,677)	(5,760)
Unrealized Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(5,091)	(4,249)	(4,069)	(3,564)
Other comprehensive income (loss) before reclassifications net of tax	952	(235)	(70)	(920)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0	0
Other comprehensive income (loss), net of tax	952	(235)	(70)	(920)
Balance, end of period	(4,139)	(4,484)	(4,139)	(4,484)
Unrealized Gains (Losses) on Fixed Maturity Securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	401	1,978	1,139	(702)
Other comprehensive income (loss) before reclassifications net of tax	198	(2,349)	(368)	398
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(42)	(32)	(214)	(99)
Other comprehensive income (loss), net of tax	156	(2,381)	(582)	299
Balance, end of period	557	(403)	557	(403)
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(22)	(25)	(22)	(27)
Other comprehensive income (loss) before reclassifications net of tax	1	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	1	1	2	3
Other comprehensive income (loss), net of tax	2	1	2	3
Balance, end of period	(20)	(24)	(20)	(24)
Effect of Changes in Discount Rate Assumptions
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,425	(5,059)	(2,560)	(2,100)
Other comprehensive income (loss) before reclassifications net of tax	(1,492)	4,193	2,493	1,234
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0	0
Other comprehensive income (loss), net of tax	(1,492)	4,193	2,493	1,234
Balance, end of period	(67)	(866)	(67)	(866)
Pension Liability Adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(5)	17	(8)	(36)
Other comprehensive income (loss) before reclassifications net of tax	(3)	0	1	52
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	(1)	1
Other comprehensive income (loss), net of tax	(3)	0	0	53
Balance, end of period	$ (8)	$ 17	$ (8)	$ 17