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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than one year | $ 509 |
One year through five years | 3,485 |
After five years through ten years | 1,673 |
Greater than ten years | 1,949 |
Fair Value | 9,902 | $ 13,240
Unrealized Losses |  |
Less than one year | 8 |
One year through five years | 98 |
After five years through ten years | 98 |
Greater than ten years | 243 |
Unrealized Losses | 547 | 707
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 445 |
Fair Value | 445 | 609
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 41 |
Unrealized Losses | 41 | 54
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 694 |
Fair Value | 694 | 1,092
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 50 |
Unrealized Losses | 50 | 67
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 1,147 |
Fair Value | 1,147 | 472
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 9 |
Unrealized Losses | 9 | $ 7
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 1 |
One year through five years | 92 |
After five years through ten years | 64 |
Greater than ten years | 129 |
Fair Value | 304 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 2 |
After five years through ten years | 4 |
Greater than ten years | 15 |
Unrealized Losses | 22 |
Supporting experience-rated products | Residential 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 | 0 |
Supporting experience-rated products | Commercial mortgage-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 | 1 |
Supporting experience-rated products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 7 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 508 |
One year through five years | 3,393 |
After five years through ten years | 1,609 |
Greater than ten years | 1,820 |
Fair Value | 9,598 |
Unrealized Losses |  |
Less than one year | 8 |
One year through five years | 96 |
After five years through ten years | 94 |
Greater than ten years | 228 |
Unrealized Losses | 525 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 440 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 41 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 688 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 49 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 1,140 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 9 |

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