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Financial Instruments - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 USD ($) MMBTU | Dec. 31, 2025 USD ($) MMBTU
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Financial instruments with fair values | $ | $ 0 | $ 0
Natural Gas Purchase Commitments [Member] |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Natural gas purchase commitments volume | 700,000 |
Natural Gas Purchase Commitments [Member] | Level 2 [Member] |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Natural gas purchase commitments volume | 0 | 0

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