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Asset Retirement Obligations - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
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Dec. 31, 2023 | Dec. 31, 2022
Schedule of Asset Retirement Obligations [Line Items] |  |
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation | $ 17,980,157 | $ 16,854,354
Arizona Public Service Company |  |
Schedule of Asset Retirement Obligations [Line Items] |  |
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation | 17,979,860 | $ 16,800,254
Cholla | Arizona Public Service Company |  |
Schedule of Asset Retirement Obligations [Line Items] |  |
Increase (decrease) in asset retirement obligation | 71,000 |
Four Corners Coal-Fired Power Plant | Arizona Public Service Company |  |
Schedule of Asset Retirement Obligations [Line Items] |  |
Increase (decrease) in asset retirement obligation | (7,000) |
Navajo Coal-Fired Power Plant | Arizona Public Service Company |  |
Schedule of Asset Retirement Obligations [Line Items] |  |
Increase (decrease) in asset retirement obligation | 8,000 |
Palo Verde | Arizona Public Service Company |  |
Schedule of Asset Retirement Obligations [Line Items] |  |
Increase (decrease) in asset retirement obligation | 63,000 |
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation | 59,000 |
Decrease in regulatory liability | $ 4,000 |

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- Definition Amount of increase (decrease) in asset retirement obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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