INVESTMENTS - AFS Fixed Maturities by Classification (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 89,966	$ 82,106
Allowance for Credit Losses	10	0
Gross Unrealized Gains	160	906
Gross Unrealized Losses	8,900	5,850
Fair Value	81,216	77,162
Corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	52,226	48,193
Allowance for Credit Losses	10	0
Gross Unrealized Gains	126	658
Gross Unrealized Losses	5,968	4,010
Fair Value	46,374	44,841
U.S. government, agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,119	5,040
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	1
Gross Unrealized Losses	1,721	1,304
Fair Value	3,398	3,737
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	359	378
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	3
Gross Unrealized Losses	86	71
Fair Value	273	310
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	508	556
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	3
Gross Unrealized Losses	99	77
Fair Value	409	482
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,142	7,093
Allowance for Credit Losses	0	0
Gross Unrealized Gains	9	85
Gross Unrealized Losses	397	92
Fair Value	8,754	7,086
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,225	15,978
Allowance for Credit Losses	0	0
Gross Unrealized Gains	21	126
Gross Unrealized Losses	282	46
Fair Value	16,964	16,058
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,333	4,814
Allowance for Credit Losses	0	0
Gross Unrealized Gains	2	26
Gross Unrealized Losses	347	250
Fair Value	4,988	4,590
Redeemable preferred stock
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	54	54
Allowance for Credit Losses	0	0
Gross Unrealized Gains	2	4
Gross Unrealized Losses	0	0
Fair Value	$ 56	$ 58

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).

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