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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than one year | $ 199 |
One year through five years | 2,339 |
After five years through ten years | 1,062 |
Greater than ten years | 1,747 |
Fair Value | 6,647 | $ 13,240
Unrealized Losses |  |
Less than one year | 2 |
One year through five years | 70 |
After five years through ten years | 68 |
Greater than ten years | 224 |
Unrealized Losses | 449 | 707
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 461 |
Fair Value | 461 | 609
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 40 |
Unrealized Losses | 40 | 54
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 529 |
Fair Value | 529 | 1,092
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 41 |
Unrealized Losses | 41 | 67
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 310 |
Fair Value | 310 | 472
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 4 |
Unrealized Losses | 4 | $ 7
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 0 |
One year through five years | 68 |
After five years through ten years | 35 |
Greater than ten years | 124 |
Fair Value | 245 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 2 |
After five years through ten years | 3 |
Greater than ten years | 15 |
Unrealized Losses | 21 |
Supporting experience-rated products | Residential 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 | 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 | 6 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 199 |
One year through five years | 2,271 |
After five years through ten years | 1,027 |
Greater than ten years | 1,623 |
Fair Value | 6,402 |
Unrealized Losses |  |
Less than one year | 2 |
One year through five years | 68 |
After five years through ten years | 65 |
Greater than ten years | 209 |
Unrealized Losses | 428 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 455 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 40 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 523 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 40 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 304 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 4 |

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