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Investments - Schedule of Consolidated Investments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale securities
Amortized Cost	$ 51,070	$ 45,606
Allowance for Expected Credit Losses	(67)	(42)
Gross Unrealized Gains	822	457
Gross Unrealized Losses	(2,885)	(3,648)
Fair Value/Carrying Value	48,940	42,373
Asset-backed securities
Available-for-sale securities
Amortized Cost	15,986	14,631
Allowance for Expected Credit Losses	(12)	(11)
Gross Unrealized Gains	264	191
Gross Unrealized Losses	(275)	(469)
Fair Value/Carrying Value	15,963	14,342
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	5,359	4,797
Allowance for Expected Credit Losses	(49)	(22)
Gross Unrealized Gains	61	23
Gross Unrealized Losses	(192)	(323)
Fair Value/Carrying Value	5,179	4,475
Corporates
Available-for-sale securities
Amortized Cost	23,673	20,133
Allowance for Expected Credit Losses	(5)	(6)
Gross Unrealized Gains	396	186
Gross Unrealized Losses	(2,092)	(2,417)
Fair Value/Carrying Value	21,972	17,896
Hybrids
Available-for-sale securities
Amortized Cost	609	668
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	6	3
Gross Unrealized Losses	(19)	(53)
Fair Value/Carrying Value	596	618
Municipals
Available-for-sale securities
Amortized Cost	1,682	1,826
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	20	14
Gross Unrealized Losses	(187)	(229)
Fair Value/Carrying Value	1,515	1,611
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,617	2,507
Allowance for Expected Credit Losses	(1)	(3)
Gross Unrealized Gains	61	29
Gross Unrealized Losses	(77)	(104)
Fair Value/Carrying Value	2,600	2,429
U.S. Government
Available-for-sale securities
Amortized Cost	800	679
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	9	8
Gross Unrealized Losses	(6)	(9)
Fair Value/Carrying Value	803	678
Foreign Governments
Available-for-sale securities
Amortized Cost	344	365
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	5	3
Gross Unrealized Losses	(37)	(44)
Fair Value/Carrying Value	$ 312	$ 324

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
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