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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than one year | $ 133 |
One year through five years | 1,761 |
After five years through ten years | 946 |
Greater than ten years | 1,531 |
Fair Value | 5,440 | $ 13,240
Unrealized Losses |  |
Less than one year | 2 |
One year through five years | 48 |
After five years through ten years | 43 |
Greater than ten years | 172 |
Unrealized Losses | 332 | 707
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 357 |
Fair Value | 357 | 609
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 34 |
Unrealized Losses | 34 | 54
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 400 |
Fair Value | 400 | 1,092
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 32 |
Unrealized Losses | 32 | 67
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 312 |
Fair Value | 312 | 472
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Unrealized Losses | 1 | $ 7
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 0 |
One year through five years | 50 |
After five years through ten years | 19 |
Greater than ten years | 101 |
Fair Value | 189 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 2 |
After five years through ten years | 1 |
Greater than ten years | 11 |
Unrealized Losses | 15 |
Supporting experience-rated products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 8 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting experience-rated products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 5 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Supporting experience-rated products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 6 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 133 |
One year through five years | 1,711 |
After five years through ten years | 927 |
Greater than ten years | 1,430 |
Fair Value | 5,251 |
Unrealized Losses |  |
Less than one year | 2 |
One year through five years | 46 |
After five years through ten years | 42 |
Greater than ten years | 161 |
Unrealized Losses | 317 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 349 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 34 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 395 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 31 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 306 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 1 |

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