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Inventory (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Inventory Disclosure [Abstract] |  |
Coal | $ 194 | $ 178
Natural gas | 126 | 189
Fuel oil | 8 | 8
Spare parts | 71 | 68
Fuel oil | 79 | 164
Total Inventory | $ 478 | $ 607

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- Definition Gross amount of components of assembled products that can be sold directly or indirectly through sales of assembled products. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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