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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Available-for-sale securities
Amortized Cost	$ 49,229	$ 45,606
Allowance for Expected Credit Losses	(73)	(42)
Gross Unrealized Gains	412	457
Gross Unrealized Losses	(3,822)	(3,648)
Fair Value/Carrying Value	45,746	42,373
Asset-backed securities
Available-for-sale securities
Amortized Cost	15,689	14,631
Allowance for Expected Credit Losses	(11)	(11)
Gross Unrealized Gains	240	191
Gross Unrealized Losses	(359)	(469)
Fair Value/Carrying Value	15,559	14,342
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	5,217	4,797
Allowance for Expected Credit Losses	(46)	(22)
Gross Unrealized Gains	34	23
Gross Unrealized Losses	(216)	(323)
Fair Value/Carrying Value	4,989	4,475
Corporates
Available-for-sale securities
Amortized Cost	22,383	20,133
Allowance for Expected Credit Losses	(15)	(6)
Gross Unrealized Gains	96	186
Gross Unrealized Losses	(2,780)	(2,417)
Fair Value/Carrying Value	19,684	17,896
Hybrids
Available-for-sale securities
Amortized Cost	678	668
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	4	3
Gross Unrealized Losses	(43)	(53)
Fair Value/Carrying Value	639	618
Municipals
Available-for-sale securities
Amortized Cost	1,706	1,826
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	7	14
Gross Unrealized Losses	(249)	(229)
Fair Value/Carrying Value	1,464	1,611
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,541	2,507
Allowance for Expected Credit Losses	(1)	(3)
Gross Unrealized Gains	28	29
Gross Unrealized Losses	(114)	(104)
Fair Value/Carrying Value	2,454	2,429
U.S. Government
Available-for-sale securities
Amortized Cost	643	679
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	8
Gross Unrealized Losses	(11)	(9)
Fair Value/Carrying Value	635	678
Foreign Governments
Available-for-sale securities
Amortized Cost	372	365
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	0	3
Gross Unrealized Losses	(50)	(44)
Fair Value/Carrying Value	$ 322	$ 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
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