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Investments (Narrative) (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) partnerships | Jan. 31, 2023 | Dec. 31, 2021 USD ($)
Investment [Line Items] |  |  |
Limited partnerships number | partnerships | 168 |  |
Restricted assets in fixed maturities and short-term investments | $ 15,721 |  | $ 17,092
Restricted assets in cash | $ 115 |  | $ 152
CHINA | Huatai Life Insurance Co. [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 20.00% |  | 20.00%
CHINA | Huatai Group [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 47.00% |  | 47.00%
Indirect Ownership [Member] | CHINA | Huatai Life Insurance Co. [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 37.70% |  |
Direct Ownership [Member] | Huatai Group [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 47.30% |  |
Direct Ownership [Member] | CHINA | Huatai Life Insurance Co. [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 20.00% |  |
Direct Ownership [Member] | Subsequent Event [Member] | Huatai Group [Member] |  |  |
Investment [Line Items] |  |  |
Ownership Percentage |  | 64.20% |

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