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INVESTMENTS - Available-for-sale Securities (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | $ 85,230 |  | $ 84,717
Allowance for Credit Losses | 7 |  | 2
Gross Unrealized Gains | 499 |  | 373
Gross Unrealized Losses | 7,725 |  | 8,447
Fair Value | 77,997 |  | 76,641
Amortized Cost (Less Allowance for Credit Losses) |  |  |
Due in one year or less | 2,652 |  |
Due in years two through five | 15,365 |  |
Due in years six through ten | 19,282 |  |
Due after ten years | 24,205 |  |
Subtotal | 61,504 |  |
Amortized Cost (Less Allowance for Credit Losses) | 85,223 |  |
Fair Value |  |  |
Due in one year or less | 2,634 |  |
Due in years two through five | 15,068 |  |
Due in years six through ten | 18,502 |  |
Due after ten years | 18,435 |  |
Subtotal | 54,639 |  |
Fair Value | 77,997 |  | 76,641
Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments |  |  |
Proceeds from sales | 1,302 | $ 444 |
Gross gains on sales | 2 | 0 |
Gross losses on sales | (3) | (24) |
Net (increase) decrease in Allowance for Credit and Intent to Sell losses | (6) | (2) |
Fixed Maturities - Credit Loss Impairments |  |  |
Balance, beginning of period | 47 | 48 |
Previously recognized impairments on securities that matured, paid, prepaid or sold | 0 | (4) |
Recognized impairments on securities impaired to fair value this period | 0 | 0 |
Credit losses recognized this period on securities for which credit losses were not previously recognized | 5 | 3 |
Additional credit losses this period on securities previously impaired | 1 | 1 |
Balance, end of period | 53 | $ 48 |
Corporate |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 54,248 |  | 55,218
Allowance for Credit Losses | 7 |  | 2
Gross Unrealized Gains | 336 |  | 251
Gross Unrealized Losses | 5,640 |  | 6,116
Fair Value | 48,937 |  | 49,351
Fair Value |  |  |
Fair Value | 48,937 |  | 49,351
U.S. government, agencies and authorities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 6,110 |  | 5,801
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 3 |  | 0
Gross Unrealized Losses | 1,359 |  | 1,513
Fair Value | 4,754 |  | 4,288
Fair Value |  |  |
Fair Value | 4,754 |  | 4,288
States and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 469 |  | 472
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 3 |  | 2
Gross Unrealized Losses | 83 |  | 88
Fair Value | 389 |  | 386
Fair Value |  |  |
Fair Value | 389 |  | 386
Foreign governments |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 684 |  | 689
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 1 |  | 1
Gross Unrealized Losses | 126 |  | 136
Fair Value | 559 |  | 554
Fair Value |  |  |
Fair Value | 559 |  | 554
Residential mortgage-backed |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 5,323 |  | 4,520
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 53 |  | 15
Gross Unrealized Losses | 116 |  | 152
Fair Value | 5,260 |  | 4,383
Amortized Cost (Less Allowance for Credit Losses) |  |  |
Without single maturity date | 5,323 |  |
Fair Value |  |  |
Without single maturity date | 5,260 |  |
Fair Value | 5,260 |  | 4,383
Asset-backed |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 13,857 |  | 13,660
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 91 |  | 96
Gross Unrealized Losses | 63 |  | 57
Fair Value | 13,885 |  | 13,699
Amortized Cost (Less Allowance for Credit Losses) |  |  |
Without single maturity date | 13,857 |  |
Fair Value |  |  |
Without single maturity date | 13,885 |  |
Fair Value | 13,885 |  | 13,699
Commercial mortgage-backed |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 4,485 |  | 4,301
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 9 |  | 5
Gross Unrealized Losses | 338 |  | 385
Fair Value | 4,156 |  | 3,921
Amortized Cost (Less Allowance for Credit Losses) |  |  |
Without single maturity date | 4,485 |  |
Fair Value |  |  |
Without single maturity date | 4,156 |  |
Fair Value | 4,156 |  | 3,921
Redeemable preferred stock |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 54 |  | 56
Allowance for Credit Losses | 0 |  | 0
Gross Unrealized Gains | 3 |  | 3
Gross Unrealized Losses | 0 |  | 0
Fair Value | 57 |  | 59
Amortized Cost (Less Allowance for Credit Losses) |  |  |
Without single maturity date | 54 |  |
Fair Value |  |  |
Without single maturity date | 57 |  |
Fair Value | $ 57 |  | $ 59

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