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Schedule I (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Other Investments |  | $ 13,696 | $ 11,169
Cost or Amortized Cost | [1] | 121,248 |
Fair Value |  | 112,871 |
Amount at Which Shown in the Balance Sheet |  | 113,280 |
All Related Party [Member] |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Other Investments |  | 271 |
Fixed maturities available for sale |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost | [1] | 93,186 |
Fair Value |  | 85,220 |
Amount at Which Shown in the Balance Sheet |  | 85,220 |
Fixed maturities available for sale | U.S. Treasury / Agency |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 2,792 |
Fair Value |  | 2,626 |
Amount at Which Shown in the Balance Sheet |  | 2,626 |
Fixed maturities available for sale | Non-U.S. |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 28,005 |
Fair Value |  | 25,908 |
Amount at Which Shown in the Balance Sheet |  | 25,908 |
Fixed maturities available for sale | Corporate securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 40,440 |
Fair Value |  | 36,955 |
Amount at Which Shown in the Balance Sheet |  | 36,955 |
Fixed maturities available for sale | Mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 17,868 |
Fair Value |  | 15,851 |
Amount at Which Shown in the Balance Sheet |  | 15,851 |
Fixed maturities available for sale | States, municipalities, and political subdivisions |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 4,081 |
Fair Value |  | 3,880 |
Amount at Which Shown in the Balance Sheet |  | 3,880 |
Fixed maturities held to maturity |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost | [1] | 8,848 |
Fair Value |  | 8,439 |
Amount at Which Shown in the Balance Sheet |  | 8,848 |
Fixed maturities held to maturity | U.S. Treasury / Agency |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 1,417 |
Fair Value |  | 1,370 |
Amount at Which Shown in the Balance Sheet |  | 1,417 |
Fixed maturities held to maturity | Non-U.S. |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 1,136 |
Fair Value |  | 1,054 |
Amount at Which Shown in the Balance Sheet |  | 1,136 |
Fixed maturities held to maturity | Corporate securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 1,705 |
Fair Value |  | 1,580 |
Amount at Which Shown in the Balance Sheet |  | 1,705 |
Fixed maturities held to maturity | Mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 1,455 |
Fair Value |  | 1,351 |
Amount at Which Shown in the Balance Sheet |  | 1,455 |
Fixed maturities held to maturity | States, municipalities, and political subdivisions |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 3,135 |
Fair Value |  | 3,084 |
Amount at Which Shown in the Balance Sheet |  | 3,135 |
Industrial, miscellaneous, and all others |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 827 |
Fair Value |  | 827 |
Amount at Which Shown in the Balance Sheet |  | 827 |
Short-term investments |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost |  | 4,962 |
Fair Value |  | 4,960 |
Amount at Which Shown in the Balance Sheet |  | 4,960 |
Other investments |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Cost or Amortized Cost | [2] | 13,425 |
Fair Value | [2] | 13,425 |
Amount at Which Shown in the Balance Sheet | [2] | $ 13,425 |
[1] | Net of valuation allowance for expected credit losses.
[2] | Excludes $271 million of related party investments.

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