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Medium- And Long-Term Debt (Schedule Of Medium- And Long-Term Debt) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |
Total medium- and long-term debt |  | $ 3,024 | $ 2,796
Parent Company |  |  |
Debt Instrument [Line Items] |  |  |
Medium- and long-term notes |  | 1,356 | 1,471
Total medium- and long-term debt |  | 1,593 | 1,736
Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated notes |  | 955 | 553
Total medium- and long-term debt |  | 1,431 | 1,060
3.80% subordinated notes due 2026 | Parent Company |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated notes | [1] | $ 237 | 265
Stated interest rate |  | 3.80% |
Maturity year |  | 2026 |
3.70% notes due 2023 | Parent Company |  |  |
Debt Instrument [Line Items] |  |  |
Medium- and long-term notes | [1] | $ 841 | 877
Stated interest rate |  | 3.70% |
Maturity year |  | 2023 |
4.00% notes due 2029 | Parent Company |  |  |
Debt Instrument [Line Items] |  |  |
Medium- and long-term notes | [1] | $ 515 | 594
Stated interest rate |  | 4.00% |
Maturity year |  | 2029 |
4.00% subordinated notes due 2025 | Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated notes | [1] | $ 331 | 363
Stated interest rate |  | 4.00% |
Maturity year |  | 2025 |
7.875% subordinated notes due 2026 | Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated notes | [1] | $ 165 | 190
Stated interest rate |  | 7.875% |
Maturity year |  | 2026 |
5.332% subordinated notes due 2033 | Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated notes | [1] | $ 459 | 0
Stated interest rate |  | 5.332% |
Maturity year |  | 2033 |
2.50% notes due 2024 | Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Medium- and long-term notes | [1] | $ 476 | $ 507
Stated interest rate |  | 2.50% |
Maturity year |  | 2024 |
[1] | The fixed interest rates on these notes have been swapped to a variable rate and designated in a hedging relationship. Accordingly, carrying value has been adjusted to reflect the change in the fair value of the debt as a result of changes in the benchmark rate.

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