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Investments - Schedule of Consolidated Investments (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Available-for-sale securities
Amortized Cost	$ 55,028	$ 51,681
Allowance for Expected Credit Losses	(103)	(67)
Gross Unrealized Gains	529	406
Gross Unrealized Losses	(3,407)	(3,802)
Fair Value/Carrying Value	52,047	48,218
Asset-backed securities
Available-for-sale securities
Amortized Cost	18,471	15,784
Allowance for Expected Credit Losses	(24)	(13)
Gross Unrealized Gains	185	202
Gross Unrealized Losses	(287)	(317)
Fair Value/Carrying Value	18,345	15,656
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	5,537	5,379
Allowance for Expected Credit Losses	(53)	(49)
Gross Unrealized Gains	65	53
Gross Unrealized Losses	(159)	(201)
Fair Value/Carrying Value	5,390	5,182
Corporates
Available-for-sale securities
Amortized Cost	24,727	24,425
Allowance for Expected Credit Losses	(26)	(5)
Gross Unrealized Gains	210	108
Gross Unrealized Losses	(2,572)	(2,832)
Fair Value/Carrying Value	22,339	21,696
Hybrids
Available-for-sale securities
Amortized Cost	588	604
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	6
Gross Unrealized Losses	(25)	(29)
Fair Value/Carrying Value	566	581
Municipals
Available-for-sale securities
Amortized Cost	1,584	1,638
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	3
Gross Unrealized Losses	(238)	(255)
Fair Value/Carrying Value	1,349	1,386
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,985	2,869
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	54	32
Gross Unrealized Losses	(78)	(105)
Fair Value/Carrying Value	2,961	2,796
U.S. Government
Available-for-sale securities
Amortized Cost	770	645
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	7	2
Gross Unrealized Losses	(4)	(10)
Fair Value/Carrying Value	773	637
Foreign Governments
Available-for-sale securities
Amortized Cost	366	337
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(44)	(53)
Fair Value/Carrying Value	$ 324	$ 284

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
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-Publisher FASB
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