INVESTMENTS - Summary of Fixed Maturity and Equity Securities by Security Type (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value
Less than 12 months	$ 6,347	$ 15,215
Greater than 12 months	15,099	4,432
Total	21,445	19,647
Gross Unrealized Depreciation
Less than 12 months	(320)	(1,217)
Greater than 12 months	(1,823)	(764)
Total	(2,143)	(1,982)
No Recorded Allowance for Credit Losses
Fair Value
Less than 12 months	6,346	15,213
Greater than 12 months	15,098	4,432
Total	21,445	19,645
Gross Unrealized Depreciation
Less than 12 months	(320)	(1,217)
Greater than 12 months	(1,822)	(764)
Total	(2,141)	(1,982)
U.S. Treasury securities and obligations of U.S. government agencies and corporations
Fair Value
Less than 12 months	197	668
Greater than 12 months	841	487
Total	1,038	1,155
Gross Unrealized Depreciation
Less than 12 months	(11)	(31)
Greater than 12 months	(70)	(52)
Total	(81)	(82)
Obligations of U.S. states and political subdivisions
Fair Value
Less than 12 months	108	235
Greater than 12 months	206	27
Total	314	261
Gross Unrealized Depreciation
Less than 12 months	(3)	(23)
Greater than 12 months	(39)	(9)
Total	(42)	(32)
Corporate Securities
Fair Value
Less than 12 months	2,030	4,143
Greater than 12 months	4,292	1,316
Total	6,322	5,459
Gross Unrealized Depreciation
Less than 12 months	(142)	(326)
Greater than 12 months	(512)	(234)
Total	(653)	(561)
Asset-backed Securities
Fair Value
Less than 12 months	846	3,204
Greater than 12 months	2,245	456
Total	3,091	3,661
Gross Unrealized Depreciation
Less than 12 months	(20)	(142)
Greater than 12 months	(48)	(29)
Total	(69)	(171)
Commercial
Fair Value
Less than 12 months	152	806
Greater than 12 months	865	101
Total	1,017	907
Gross Unrealized Depreciation
Less than 12 months	(4)	(90)
Greater than 12 months	(120)	(15)
Total	(124)	(105)
Agency Residential
Fair Value
Less than 12 months	1,204	1,905
Greater than 12 months	2,090	870
Total	3,294	2,776
Gross Unrealized Depreciation
Less than 12 months	(68)	(132)
Greater than 12 months	(368)	(158)
Total	(435)	(289)
Non-agency Residential
Fair Value
Less than 12 months	164	4
Greater than 12 months	4	1
Total	167	4
Gross Unrealized Depreciation
Less than 12 months	(9)	0
Greater than 12 months	0	0
Total	(9)	0
Foreign government securities
Fair Value
Less than 12 months	447	985
Greater than 12 months	1,109	321
Total	1,556	1,306
Gross Unrealized Depreciation
Less than 12 months	(21)	(100)
Greater than 12 months	(176)	(79)
Total	(197)	(179)
Foreign corporate securities
Fair Value
Less than 12 months	1,199	3,264
Greater than 12 months	3,447	853
Total	4,646	4,117
Gross Unrealized Depreciation
Less than 12 months	(42)	(372)
Greater than 12 months	(488)	(189)
Total	(531)	(561)
Recorded an Allowance for Credit Losses
Fair Value
Less than 12 months	0	2
Greater than 12 months	0	0
Total	1	2
Gross Unrealized Depreciation
Less than 12 months	(1)	0
Greater than 12 months	(1)	0
Total	$ (2)	$ 0

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