| **Income Taxes (Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit) (Details) - USD ($) $ in Millions**                                                                                                                                                                                                                                                                                        | 12 Months Ended |
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| **Income Tax Disclosure [Abstract]**                                                                                                                                                                                                                                                                                                                                                                                                                                                   |            |   |  |   |  |
| Income tax expense at statutory rates                                                                                                                                                                                                                                                                                                                                                                                                                                                  | $ (319)         | $ (172) |  | $ (308) |  |
| Tax benefit from tax exempt income                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 30              | 41 |  | 51 |  |
| Foreign taxes and credits                                                                                                                                                                                                                                                                                                                                                                                                                                                              | (5)             | 15 |  | (3) |  |
| State income tax expense                                                                                                                                                                                                                                                                                                                                                                                                                                                               | (13)            | (10) |  | (13) |  |
| Other tax expense                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | (6)             | (6) |  | (5) |  |
| Income tax expense                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | $ (313)         | $ (132) | [1] | $ (278) | [1] |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| [1]As of January 1, 2023, the Company adopted ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12) using the modified retrospective method applied as of the transition date of January 1, 2021.  Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance.  See Note A to the Consolidated Financial Statements for additional information. |

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| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).
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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.
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