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Long-term and Short-term Debt (Short-term with Maturities of Year or Less) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Debt Disclosure [Abstract] |  |
Short-term Debt | $ 465 | $ 119
Average daily balance | $ 270 | $ 142
Average days outstanding | 82 days | 65 days

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