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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale securities
Amortized Cost	$ 45,606	$ 37,708
Allowance for Expected Credit Losses	(42)	(39)
Gross Unrealized Gains	457	98
Gross Unrealized Losses	(3,648)	(4,672)
Fair Value/Carrying Value	42,373	33,095
Asset-backed securities
Available-for-sale securities
Amortized Cost	14,631	12,209
Allowance for Expected Credit Losses	(11)	(8)
Gross Unrealized Gains	191	36
Gross Unrealized Losses	(469)	(770)
Fair Value/Carrying Value	14,342	11,467
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	4,797	3,337
Allowance for Expected Credit Losses	(22)	(1)
Gross Unrealized Gains	23	11
Gross Unrealized Losses	(323)	(284)
Fair Value/Carrying Value	4,475	3,063
Corporates
Available-for-sale securities
Amortized Cost	20,133	17,396
Allowance for Expected Credit Losses	(6)	(22)
Gross Unrealized Gains	186	32
Gross Unrealized Losses	(2,417)	(3,069)
Fair Value/Carrying Value	17,896	14,337
Hybrids
Available-for-sale securities
Amortized Cost	668	806
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	9
Gross Unrealized Losses	(53)	(84)
Fair Value/Carrying Value	618	731
Municipals
Available-for-sale securities
Amortized Cost	1,826	1,749
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	14	4
Gross Unrealized Losses	(229)	(293)
Fair Value/Carrying Value	1,611	1,460
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,507	1,638
Allowance for Expected Credit Losses	(3)	(8)
Gross Unrealized Gains	29	6
Gross Unrealized Losses	(104)	(109)
Fair Value/Carrying Value	2,429	1,527
U.S. Government
Available-for-sale securities
Amortized Cost	679	287
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	8	0
Gross Unrealized Losses	(9)	(16)
Fair Value/Carrying Value	678	271
Foreign Governments
Available-for-sale securities
Amortized Cost	365	286
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	0
Gross Unrealized Losses	(44)	(47)
Fair Value/Carrying Value	$ 324	$ 239

X

- Definition

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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