INVESTMENTS - Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities - Available for Sale, by Security Type (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair Value
Less than 12 months	$ 1,369	$ 8,524
Greater than 12 months	6,187	2,698
Total	7,556	11,222
Gross Unrealized Depreciation
Less than 12 months	(55)	(591)
Greater than 12 months	(481)	(421)
Total	(536)	(1,013)
No Recorded Allowance for Credit Losses
Fair Value
Less than 12 months	1,367	8,522
Greater than 12 months	6,187	2,698
Total	7,554	11,220
Gross Unrealized Depreciation
Less than 12 months	(54)	(591)
Greater than 12 months	(481)	(421)
Total	(536)	(1,012)
U.S. Treasury securities and obligations of U.S. government agencies and corporations
Fair Value
Less than 12 months	7	290
Greater than 12 months	238	245
Total	245	535
Gross Unrealized Depreciation
Less than 12 months	0	(14)
Greater than 12 months	(17)	(26)
Total	(17)	(40)
State, municipalities and political subdivisions
Fair Value
Less than 12 months	3	235
Greater than 12 months	74	27
Total	77	261
Gross Unrealized Depreciation
Less than 12 months	0	(23)
Greater than 12 months	(11)	(9)
Total	(11)	(32)
Corporate securities
Fair Value
Less than 12 months	673	2,138
Greater than 12 months	1,150	841
Total	1,822	2,979
Gross Unrealized Depreciation
Less than 12 months	(47)	(175)
Greater than 12 months	(112)	(146)
Total	(160)	(321)
Asset-backed securities
Fair Value
Less than 12 months	179	3,120
Greater than 12 months	1,958	436
Total	2,138	3,556
Gross Unrealized Depreciation
Less than 12 months	(2)	(138)
Greater than 12 months	(46)	(27)
Total	(48)	(165)
Commercial
Fair Value
Less than 12 months	19	464
Greater than 12 months	491	36
Total	511	500
Gross Unrealized Depreciation
Less than 12 months	0	(50)
Greater than 12 months	(53)	(9)
Total	(53)	(59)
Agency residential
Fair Value
Less than 12 months	203	852
Greater than 12 months	1,030	605
Total	1,233	1,456
Gross Unrealized Depreciation
Less than 12 months	(2)	(54)
Greater than 12 months	(123)	(113)
Total	(124)	(167)
Non-agency residential
Fair Value
Less than 12 months	125	2
Greater than 12 months	3	1
Total	128	3
Gross Unrealized Depreciation
Less than 12 months	(1)	0
Greater than 12 months	0	0
Total	(1)	0
Foreign government securities
Fair Value
Less than 12 months	38	455
Greater than 12 months	423	144
Total	461	599
Gross Unrealized Depreciation
Less than 12 months	(1)	(36)
Greater than 12 months	(38)	(25)
Total	(39)	(61)
Foreign corporate securities
Fair Value
Less than 12 months	120	967
Greater than 12 months	821	365
Total	940	1,332
Gross Unrealized Depreciation
Less than 12 months	(2)	(100)
Greater than 12 months	(80)	(67)
Total	(82)	(167)
Securities where an allowance for credit loss was recorded
Fair Value
Less than 12 months	2	2
Greater than 12 months	0	0
Total	2	2
Gross Unrealized Depreciation
Less than 12 months	(1)	(1)
Greater than 12 months	0	0
Total	$ (1)	$ (1)