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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Available-for-sale securities
Amortized Cost	$ 51,681	$ 45,606
Allowance for Expected Credit Losses	(67)	(42)
Gross Unrealized Gains	406	457
Gross Unrealized Losses	(3,802)	(3,648)
Fair Value	48,218	42,373
Asset-backed securities
Available-for-sale securities
Amortized Cost	15,784	14,631
Allowance for Expected Credit Losses	(13)	(11)
Gross Unrealized Gains	202	191
Gross Unrealized Losses	(317)	(469)
Fair Value	15,656	14,342
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	5,379	4,797
Allowance for Expected Credit Losses	(49)	(22)
Gross Unrealized Gains	53	23
Gross Unrealized Losses	(201)	(323)
Fair Value	5,182	4,475
Corporates
Available-for-sale securities
Amortized Cost	24,425	20,133
Allowance for Expected Credit Losses	(5)	(6)
Gross Unrealized Gains	108	186
Gross Unrealized Losses	(2,832)	(2,417)
Fair Value	21,696	17,896
Hybrids
Available-for-sale securities
Amortized Cost	604	668
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	6	3
Gross Unrealized Losses	(29)	(53)
Fair Value	581	618
Municipals
Available-for-sale securities
Amortized Cost	1,638	1,826
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	14
Gross Unrealized Losses	(255)	(229)
Fair Value	1,386	1,611
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,869	2,507
Allowance for Expected Credit Losses	0	(3)
Gross Unrealized Gains	32	29
Gross Unrealized Losses	(105)	(104)
Fair Value	2,796	2,429
U.S. Government
Available-for-sale securities
Amortized Cost	645	679
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	2	8
Gross Unrealized Losses	(10)	(9)
Fair Value	637	678
Foreign Governments
Available-for-sale securities
Amortized Cost	337	365
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	0	3
Gross Unrealized Losses	(53)	(44)
Fair Value	$ 284	$ 324

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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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