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v3.25.3

INVESTMENTS - Additional Information (Detail) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) investment | Sep. 30, 2024 USD ($) investment | Jun. 30, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Held to maturity securities transferred to available for sale securities, number of investments | investment |  |  | 0 | 0 |  |  |  |
Real estate owned impairments | $ 0 | $ 0 | $ 6 | $ 0 |  |  |  |
Real estate owned, estimated fair value after impairment | 12 |  | 12 |  |  |  |  |
Equity securities, FV-NI, unrealized gain (loss) | 11 | 34 | 46 | 79 |  |  |  |
Transitional real estate loan commitments | 165 |  | 165 |  |  |  |  |
Middle market loan commitments | 732 |  | 732 |  |  |  |  |
Other loan commitments | 1 |  | 1 |  |  |  |  |
Nonaccrual loans, interest income | 0 | 0 | 1 | 0 |  |  |  |
Financing Receivable, Modified, Commitment to Lend | 14 |  | 14 |  |  | $ 14 |  |
Amortized Cost | 16,960 |  | 16,960 |  |  | 15,971 |  |
Allowance for credit losses | 422 |  | 422 |  |  | 355 |  |
Real estate owned, accumulated depreciation | 35 |  | 35 |  |  | 14 |  |
Limited partnerships investment commitments | $ 3,100 |  | $ 3,100 |  |  | 2,800 |  |
Percentage that the lending policy requires that the fair value of the securities received as collateral be of the fair value of the loaned securities | 102.00% |  | 102.00% |  |  |  |  |
Percentage that the lending policy requires that the fair value of the unrestricted cash received as collateral be of the fair value of the loaned securities | 100.00% |  | 100.00% |  |  |  |  |
Securities Lending, Securities Received as Collateral | $ 1,600 |  | $ 1,600 |  |  | 3,000 |  |
Repurchase Agreements and Repurchase-to-Maturity Transactions Outstanding | 0 |  | 0 |  |  | 0 |  |
Variable Interest Entity, Not Consolidated |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Limited partnerships investment commitments | 2,000 |  | 2,000 |  |  | 2,100 |  |
Real estate owned |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Depreciation | 8 | 4 | 21 | 8 |  |  |  |
Transitional real estate loans |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans, no allowance | 45 |  | 45 |  |  | 140 |  |
Allowance for credit losses | 271 | 151 | 271 | 151 | $ 243 | 199 | $ 123 | $ 112
Transitional real estate loans | Potential Foreclosure or Deed-in-lieu Foreclosure |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Mortgage Loans in Process of Foreclosure, Amount | 136 |  | 136 |  |  |  |  |
Allowance for credit losses | 42 |  | 42 |  |  |  |  |
Middle market loans |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans, no allowance | 21 |  | 21 |  |  | 5 |  |
Allowance for credit losses | 139 | $ 103 | 139 | $ 103 | $ 127 | $ 140 | $ 98 | $ 146
Zero-credit-loss expectation | Japan government and agencies |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Amortized Cost | $ 16,100 |  | $ 16,100 |  |  |  |  |
CALIFORNIA | Geographic Concentration Risk | Mortgages |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 22.00% |  |  |  |  |
TEXAS | Geographic Concentration Risk | Mortgages |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 13.00% |  |  |  |  |
FLORIDA | Geographic Concentration Risk | Mortgages |  |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  | 8.00% |  |  |  |  |

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