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Fair Value of Assets and Liabilities - Change in unrealized gains and losses included in net income for level 3 assets and liabilities (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | $ 3 | $ 37 |
Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag |  |  | Total included in net income
Total included in net income | 3 | 37 |
Total included in net income | 3 | 37 |
Changes in unrealized net capital gains and losses reported in OCI | $ 1 | $ (1) |
Net investment income |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net investment income | Net investment income |
Total included in net income | $ (5) | $ 9 |
Net gains (losses) on investments and derivatives |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Net gains (losses) on investments and derivatives | Net gains (losses) on investments and derivatives |
Total included in net income | $ 8 | $ 28 |
Corporate - privately placed |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | (4) | 0 |
Changes in unrealized net capital gains and losses reported in OCI | 0 | 1 |
Fixed income securities |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | (4) | 0 |
Equity securities |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | (1) | 25 |
Other investments |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | (1) | 0 |
Other assets |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Total recurring Level 3 assets | 9 | 12 |
Corporate - public |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Changes in unrealized net capital gains and losses reported in OCI | $ 1 | $ (2) |

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- Definition This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets). Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References No definition available. + Details
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