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v3.25.1

Investments - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 USD ($) investment | Mar. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) investment
Investments [Line Items] |  |  |
Decrease in gross AFS securities unrealized losses | $ 742 |  |
Percentage of fair value rated as investment grade | 96.00% |  | 96.00%
Losses from loan modifications | $ 5 | $ 0 |
Number of partnerships in alternative investment portfolio | investment | 370 |  | 371
Alternative investments as a percentage of overall invested assets | 3.00% |  | 3.00%
Investment commitments | $ 4,600 |  |
Investment commitments for limited partnerships | 3,500 |  |
Investment commitments for mortgage loans on real estate | 828 |  |
Investment commitments for private placements | 277 |  |
Derivative Counterparties |  |  |
Investments [Line Items] |  |  |
Fair value of collateral received that we are permitted to sell or re-pledge | 2,200 |  |
Fair value of securities received as collateral that have been resold or repledged | 64 |  |
Corporate bonds |  |  |
Investments [Line Items] |  |  |
Amortized cost of portfolio rated below investment grade | 2,800 |  | $ 2,900
Fair value of portfolio rated below investment grade | 2,700 |  | 2,800
Fannie Mae | MBS |  |  |
Investments [Line Items] |  |  |
Fair value, concentration of risk, investments | $ 892 |  | $ 851
Fannie Mae | Investments | Lender Concentration Risk | MBS |  |  |
Investments [Line Items] |  |  |
Concentration risk | 1.00% |  | 1.00%
Federal Home Loan Mortgage Corporation | MBS |  |  |
Investments [Line Items] |  |  |
Fair value, concentration of risk, investments | $ 604 |  | $ 566
Federal Home Loan Mortgage Corporation | Investments | Lender Concentration Risk | MBS |  |  |
Investments [Line Items] |  |  |
Concentration risk | 1.00% |  | 1.00%
Financial Service | Securities Investment |  |  |
Investments [Line Items] |  |  |
Fair value, concentration of risk, investments | $ 13,500 |  | $ 13,400
Financial Service | Investments | Lender Concentration Risk | Securities Investment |  |  |
Investments [Line Items] |  |  |
Concentration risk | 10.00% |  | 10.00%
Consumer Non-Cyclical Industry | Securities Investment |  |  |
Investments [Line Items] |  |  |
Fair value, concentration of risk, investments | $ 13,000 |  | $ 12,900
Consumer Non-Cyclical Industry | Investments | Lender Concentration Risk | Securities Investment |  |  |
Investments [Line Items] |  |  |
Concentration risk |  |  | 10.00%

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