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Dispositions (Cash Flow Statement) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Commercial Renewables | Discontinued Operations, Held-for-sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Operating activities | $ (3) | $ (3)

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