El Dorado Equity Investments - Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | ||
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Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
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| SAI & Copper Sky | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Income (loss) from equity method investments | $ 13.5 | $ 18.7 | |
| Equity investments | $ 25.7 | $ 25.1 | |
| SAI | |||
| Schedule of Equity Method Investments [Line Items] | |||
| Pinnacle West Ownership Percentage as of June 30, 2026 | 17.99% | ||
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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