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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Available-for-sale securities
Amortized Cost	$ 43,903	$ 37,708
Allowance for Expected Credit Losses	(44)	(39)
Gross Unrealized Gains	169	98
Gross Unrealized Losses	(5,243)	(4,672)
Fair Value/Carrying Value	38,785	33,095
Asset-backed securities
Available-for-sale securities
Amortized Cost	13,887	12,209
Allowance for Expected Credit Losses	(18)	(8)
Gross Unrealized Gains	132	36
Gross Unrealized Losses	(622)	(770)
Fair Value/Carrying Value	13,379	11,467
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	4,548	3,337
Allowance for Expected Credit Losses	(17)	(1)
Gross Unrealized Gains	12	11
Gross Unrealized Losses	(369)	(284)
Fair Value/Carrying Value	4,174	3,063
Corporates
Available-for-sale securities
Amortized Cost	19,771	17,396
Allowance for Expected Credit Losses	(5)	(22)
Gross Unrealized Gains	15	32
Gross Unrealized Losses	(3,602)	(3,069)
Fair Value/Carrying Value	16,179	14,337
Hybrids
Available-for-sale securities
Amortized Cost	670	806
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	9
Gross Unrealized Losses	(72)	(84)
Fair Value/Carrying Value	601	731
Municipals
Available-for-sale securities
Amortized Cost	1,866	1,749
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(338)	(293)
Fair Value/Carrying Value	1,528	1,460
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,327	1,638
Allowance for Expected Credit Losses	(4)	(8)
Gross Unrealized Gains	7	6
Gross Unrealized Losses	(156)	(109)
Fair Value/Carrying Value	2,174	1,527
U.S. Government
Available-for-sale securities
Amortized Cost	470	287
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(18)	(16)
Fair Value/Carrying Value	452	271
Foreign Governments
Available-for-sale securities
Amortized Cost	364	286
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(66)	(47)
Fair Value/Carrying Value	$ 298	$ 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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+ References

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