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Investments - Schedule of Amortized Cost and Fair Value of Fixed Maturity Available-for-Sale Securities (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | $ 26,993 | $ 24,032
Amortized Cost | 55,028 | 51,681
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 26,696 | 23,634
Total fixed maturity available-for-sale securities, Fair Value | 52,047 | 48,218
Corporates, Non-structured Hybrids, Municipal and Government securities: |  |
Amortized Cost |  |
Due in one year or less | 778 | 961
Due after one year through five years | 4,701 | 4,616
Due after five years through ten years | 5,417 | 5,311
Due after ten years | 17,139 | 16,761
Subtotal, Amortized Cost | 28,035 | 27,649
Fair Value |  |
Due in one year or less | 775 | 955
Due after one year through five years | 4,695 | 4,544
Due after five years through ten years | 5,359 | 5,126
Due after ten years | 14,522 | 13,959
Subtotal, Fair Value | 25,351 | 24,584
Asset-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 18,471 | 15,784
Amortized Cost | 18,471 | 15,784
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 18,345 | 15,656
Total fixed maturity available-for-sale securities, Fair Value | 18,345 | 15,656
Commercial mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 5,537 | 5,379
Amortized Cost | 5,537 | 5,379
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 5,390 | 5,182
Total fixed maturity available-for-sale securities, Fair Value | 5,390 | 5,182
Residential mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 2,985 | 2,869
Amortized Cost | 2,985 | 2,869
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 2,961 | 2,796
Total fixed maturity available-for-sale securities, Fair Value | $ 2,961 | $ 2,796

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