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Fair Value of Financial Instruments Fair Value Options Quantitative Disclosure (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Low [Member] |  |
Commodity Contracts |  |
Electricity physical forwards | $ 31.12 | $ 14.00
Natural gas financial swaps | 1.85 | 1.86
Financial swaps - electricity | 36.00 | 27.00
High [Member] |  |
Commodity Contracts |  |
Electricity physical forwards | 98.97 | 99.68
Natural gas financial swaps | 8.09 | 6.53
Financial swaps - electricity | 95.27 | 110.00
Weighted Average [Member] |  |
Commodity Contracts |  |
Electricity physical forwards | 62.39 | 59.43
Natural gas financial swaps | 2.61 | 2.68
Financial swaps - electricity | 41.48 | 70.55
Assets [Member] |  |
Commodity Contracts |  |
Electricity physical forwards | 0 | 0
Natural gas financial swaps | 1,000,000 | 0
Financial swaps - electricity | 0 | 1,000,000
Total commodity contracts | 1,000,000 | 1,000,000
Liabilities [Member] |  |
Commodity Contracts |  |
Electricity physical forwards | 29,000,000 | 28,000,000
Natural gas financial swaps | 6,000,000 | 4,000,000
Financial swaps - electricity | 1,000,000 | 3,000,000
Total commodity contracts | $ 36,000,000 | $ 35,000,000

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