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Debt And Related Expenses (Schedule of Net Financing Cost Components) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Disclosure [Abstract] |  |  |
Interest based on debt outstanding | $ 370 | $ 388 | $ 259
Gain on early retirement of debt | 0 | 30 | 0
Interest income | (38) | (2) | (12)
Other | (23) | (27) | 23
Total net financing costs | $ 309 | $ 329 | $ 270

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