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Schedule I (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Other Investments | $ 11,169 | $ 7,945
Cost or Amortized Cost | 119,450 |
Fair Value | 122,607 |
Amount at Which Shown in the Balance Sheet | 122,078 |
All Related Party [Member] |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Other Investments | 245 |
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 | 90,479 |
Fair Value | 93,108 |
Amount at Which Shown in the Balance Sheet | 93,108 |
Fixed maturities available for sale | U.S. Treasury and agency |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 2,111 |
Fair Value | 2,214 |
Amount at Which Shown in the Balance Sheet | 2,214 |
Fixed maturities available for sale | Foreign |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 25,148 |
Fair Value | 25,829 |
Amount at Which Shown in the Balance Sheet | 25,829 |
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 | 37,838 |
Fair Value | 39,063 |
Amount at Which Shown in the Balance Sheet | 39,063 |
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 | 20,080 |
Fair Value | 20,489 |
Amount at Which Shown in the Balance Sheet | 20,489 |
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 | 5,302 |
Fair Value | 5,513 |
Amount at Which Shown in the Balance Sheet | 5,513 |
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 | 10,118 |
Fair Value | 10,647 |
Amount at Which Shown in the Balance Sheet | 10,118 |
Fixed maturities held to maturity | U.S. Treasury and agency |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 1,213 |
Fair Value | 1,244 |
Amount at Which Shown in the Balance Sheet | 1,213 |
Fixed maturities held to maturity | Foreign |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 1,196 |
Fair Value | 1,262 |
Amount at Which Shown in the Balance Sheet | 1,196 |
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 | 2,004 |
Fair Value | 2,201 |
Amount at Which Shown in the Balance Sheet | 2,004 |
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 | 1,730 |
Fair Value | 1,803 |
Amount at Which Shown in the Balance Sheet | 1,730 |
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 | 3,975 |
Fair Value | 4,137 |
Amount at Which Shown in the Balance Sheet | 3,975 |
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 | 4,782 |
Fair Value | 4,782 |
Amount at Which Shown in the Balance Sheet | 4,782 |
Short-term investments |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 3,147 |
Fair Value | 3,146 |
Amount at Which Shown in the Balance Sheet | 3,146 |
Other investments |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |
Cost or Amortized Cost | 10,924 |
Fair Value | 10,924 |
Amount at Which Shown in the Balance Sheet | $ 10,924 |

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