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Derivative Accounting - Schedule of Outstanding Gross Notional Amounts Outstanding (Details) - Commodity Contracts MWh in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 MWh Bcf | Dec. 31, 2024 MWh Bcf
Outstanding gross notional amount of derivatives |  |
Power | MWh | 619 | 1,051
Gas | Bcf | 241,000 | 235,000

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- Definition Nominal volume used to calculate payments on a derivative instrument. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 + Details
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