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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Available-for-sale securities
Amortized Cost	$ 42,312	$ 37,708
Allowance for Expected Credit Losses	(35)	(39)
Gross Unrealized Gains	143	98
Gross Unrealized Losses	(4,391)	(4,672)
Fair Value/Carrying Value	38,029	33,095
Asset-backed securities
Available-for-sale securities
Amortized Cost	13,492	12,209
Allowance for Expected Credit Losses	(7)	(8)
Gross Unrealized Gains	65	36
Gross Unrealized Losses	(710)	(770)
Fair Value/Carrying Value	12,840	11,467
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	4,348	3,337
Allowance for Expected Credit Losses	(18)	(1)
Gross Unrealized Gains	4	11
Gross Unrealized Losses	(345)	(284)
Fair Value/Carrying Value	3,989	3,063
Corporates
Available-for-sale securities
Amortized Cost	18,919	17,396
Allowance for Expected Credit Losses	(2)	(22)
Gross Unrealized Gains	46	32
Gross Unrealized Losses	(2,834)	(3,069)
Fair Value/Carrying Value	16,129	14,337
Hybrids
Available-for-sale securities
Amortized Cost	773	806
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	4	9
Gross Unrealized Losses	(73)	(84)
Fair Value/Carrying Value	704	731
Municipals
Available-for-sale securities
Amortized Cost	1,843	1,749
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	11	4
Gross Unrealized Losses	(251)	(293)
Fair Value/Carrying Value	1,603	1,460
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,127	1,638
Allowance for Expected Credit Losses	(8)	(8)
Gross Unrealized Gains	11	6
Gross Unrealized Losses	(114)	(109)
Fair Value/Carrying Value	2,016	1,527
U.S. Government
Available-for-sale securities
Amortized Cost	499	287
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(16)	(16)
Fair Value/Carrying Value	484	271
Foreign Governments
Available-for-sale securities
Amortized Cost	311	286
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(48)	(47)
Fair Value/Carrying Value	$ 264	$ 239

X

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
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