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Investment Information - Maturity profile of available for sale securities (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Estimated Fair Value |  |
Estimated fair value | $ 35,051 | $ 29,819
Amortized Cost |  |
Amortized cost | 34,953 | 30,354
Fixed maturities available for sale, at fair value |  |
Estimated Fair Value |  |
Due in one year or less | 370 | 438
Due after one year through five years | 17,053 | 15,364
Due after five years through 10 years | 6,893 | 5,811
Due after 10 years | 619 | 385
Single maturity date | 24,935 | 21,998
Estimated fair value | 32,426 | 27,035
Amortized Cost |  |
Due in one year or less | 366 | 451
Due after one year through five years | 16,989 | 15,590
Due after five years through 10 years | 6,877 | 6,039
Due after 10 years | 621 | 401
Single maturity date | 24,853 | 22,481
Amortized cost | 32,329 | 27,570
Mortgage backed securities |  |
Estimated Fair Value |  |
Securities without single maturity date | 2,705 | 1,079
Estimated fair value | 2,705 | 1,079
Amortized Cost |  |
Securities without single maturity date | 2,692 | 1,104
Amortized cost | 2,692 | 1,104
Commercial mortgage backed securities |  |
Estimated Fair Value |  |
Securities without single maturity date | 1,212 | 1,058
Estimated fair value | 1,212 | 1,058
Amortized Cost |  |
Securities without single maturity date | 1,207 | 1,064
Amortized cost | 1,207 | 1,064
Asset backed securities |  |
Estimated Fair Value |  |
Securities without single maturity date | 3,574 | 2,900
Estimated fair value | 3,574 | 2,900
Amortized Cost |  |
Securities without single maturity date | 3,577 | 2,921
Amortized cost | $ 3,577 | $ 2,921

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