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Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Cost or Amortized Cost |  |
Cost or Amortized Cost | $ 41,588 | $ 39,952
Estimated Fair Value |  |
Estimated Fair Value | 37,504 | 44,380
Available-for-sale Fixed Maturities |  |
Cost or Amortized Cost |  |
Due in one year or less | 952 | 1,603
Due after one year through five years | 9,487 | 10,637
Due after five years through ten years | 14,323 | 13,294
Due after ten years | 16,556 | 14,411
Cost or Amortized Cost | 41,318 | 39,945
Estimated Fair Value |  |
Due in one year or less | 948 | 1,624
Due after one year through five years | 9,000 | 11,229
Due after five years through ten years | 12,765 | 14,338
Due after ten years | 14,526 | 17,182
Estimated Fair Value | $ 37,239 | $ 44,373

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