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Regulatory Matters - Schedule of Changes in The Deferred Fuel and Purchased Power Regulatory Asset (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in regulatory asset |  |  |
Deferred fuel and purchased power costs | $ 250,288 | $ 549,877 | $ 291,992
Amounts charged to customers | (425,886) | (547,243) | (219,579)
Arizona Public Service Company |  |  |
Change in regulatory asset |  |  |
Deferred fuel and purchased power costs | 250,288 | 549,877 | 291,992
Amounts charged to customers | (425,886) | (547,243) | (219,579)
Power Supply Adjustor (PSA) | ACC | Arizona Public Service Company |  |  |
Change in regulatory asset |  |  |
Balance at beginning of period | 463,195 | 460,561 |
Deferred fuel and purchased power costs | 250,288 | 549,877 |
Amounts charged to customers | (425,886) | (547,243) |
Balance at end of period | $ 287,597 | $ 463,195 | $ 460,561

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- References No definition available. + Details
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- Definition The amortization of deferred fuel and purchased power costs. + References No definition available. + Details
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- Definition The increase (decrease) during the reporting period in unrecovered fuel costs for a regulated utility company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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