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Exit Activities and Discontinued Operations (Schedule of Retention Benefit Liability Roll Forward) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Restructuring Reserve [Roll Forward] |  |
Other current liabilities | $ 149 | $ 166
Retention Benefits |  |
Restructuring Reserve [Roll Forward] |  |
Retention benefit liability at beginning of period | 21 | 14
Costs deferred as a regulatory asset | 16 | 24
Costs paid or settled | (21) | (17)
Retention benefit liability at the end of the period | 16 | 21
Other current liabilities | $ 7 | $ 13

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