INVESTMENTS - Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less than 12 months	$ 5,267	$ 2,566
Greater than 12 months	11,143	12,222
Total	16,409	14,789
Gross Unrealized Depreciation
Less than 12 months	(116)	(102)
Greater than 12 months	(1,092)	(1,035)
Total	(1,209)	(1,137)
No Recorded Allowance for Credit Losses
Fair Value
Less than 12 months	5,233	2,564
Greater than 12 months	11,141	12,222
Total	16,374	14,787
Gross Unrealized Depreciation
Less than 12 months	(115)	(101)
Greater than 12 months	(1,092)	(1,035)
Total	(1,208)	(1,136)
Due in one year or less
Fair Value
Less than 12 months	214	184
Greater than 12 months	876	773
Total	1,090	958
Gross Unrealized Depreciation
Less than 12 months	(3)	(3)
Greater than 12 months	(36)	(30)
Total	(39)	(33)
Due in one year through five years
Fair Value
Less than 12 months	1,135	699
Greater than 12 months	3,822	3,841
Total	4,958	4,540
Gross Unrealized Depreciation
Less than 12 months	(18)	(18)
Greater than 12 months	(299)	(271)
Total	(317)	(289)
Due in five years through ten years
Fair Value
Less than 12 months	1,282	328
Greater than 12 months	2,234	2,306
Total	3,516	2,633
Gross Unrealized Depreciation
Less than 12 months	(25)	(15)
Greater than 12 months	(325)	(310)
Total	(350)	(325)
Due after ten years
Fair Value
Less than 12 months	682	429
Greater than 12 months	438	417
Total	1,119	845
Gross Unrealized Depreciation
Less than 12 months	(26)	(39)
Greater than 12 months	(74)	(77)
Total	(100)	(116)
Asset-backed Securities
Fair Value
Less than 12 months	399	196
Greater than 12 months	943	2,014
Total	1,342	2,210
Gross Unrealized Depreciation
Less than 12 months	(3)	(2)
Greater than 12 months	(30)	(49)
Total	(33)	(51)
Mortgage-backed securities
Fair Value
Less than 12 months	1,521	729
Greater than 12 months	2,828	2,872
Total	4,349	3,601
Gross Unrealized Depreciation
Less than 12 months	(40)	(24)
Greater than 12 months	(328)	(298)
Total	(368)	(323)
Recorded an Allowance for Credit Losses
Fair Value
Less than 12 months	33	2
Greater than 12 months	2	0
Total	35	2
Gross Unrealized Depreciation
Less than 12 months	(1)	(1)
Greater than 12 months	0	0
Total	$ (1)	$ (1)

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