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Commitments and Contingencies - Palo Verde Nuclear Generating Station, Contractual Obligations and Super-Fund Related Matters (Details) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 05, 2018 Defendant plaintiff | Dec. 16, 2016 plaintiff | Aug. 06, 2013 Defendant | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
Total take-or-pay commitments |  |  |  | $ 179,255 | $ 174,616 |
Arizona Public Service Company |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
2023 |  |  |  | 955,000 |  |
2024 |  |  |  | 823,000 |  |
2025 |  |  |  | 882,000 |  |
2026 |  |  |  | 905,000 |  |
2027 |  |  |  | 819,000 |  |
Thereafter |  |  |  | 8,700,000 |  |
Total take-or-pay commitments |  |  |  | 179,255 | 174,616 |
Arizona Public Service Company | Coal Take-or-Pay Commitments |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
2023 |  |  |  | 216,729 |  |
2024 |  |  |  | 211,823 |  |
2025 |  |  |  | 232,594 |  |
2026 |  |  |  | 225,345 |  |
2027 |  |  |  | 204,845 |  |
Thereafter |  |  |  | 880,113 |  |
Total take-or-pay commitments |  |  |  | 2,000,000 |  |
Present value of commitments |  |  |  | 1,600,000 |  |
Total purchases |  |  |  | 305,502 | 219,958 | $ 189,817
Arizona Public Service Company | Renewable Energy Credits |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
2023 |  |  |  | 31,000 |  |
2024 |  |  |  | 29,000 |  |
2025 |  |  |  | 27,000 |  |
2026 |  |  |  | 23,000 |  |
2027 |  |  |  | 19,000 |  |
Thereafter |  |  |  | 69,000 |  |
Arizona Public Service Company | Coal Mine Reclamation Obligations |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
2023 |  |  |  | 18,000 |  |
2024 |  |  |  | 19,000 |  |
2025 |  |  |  | 20,000 |  |
2026 |  |  |  | 21,000 |  |
2027 |  |  |  | 22,000 |  |
Thereafter |  |  |  | 25,000 |  |
Arizona Public Service Company | Coal Mine Reclamation Balance Sheet Obligations |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
Total take-or-pay commitments |  |  |  | 179,000 | $ 175,000 |
Arizona Public Service Company | Contaminated Groundwater Wells |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
Costs related to investigation and study under Superfund site |  |  |  | $ 3,000 |  |
Number of defendants against whom Roosevelt Irrigation District ("RID") filed lawsuit | Defendant | 28 |  | 24 |  |  |
Number of plaintiffs | plaintiff |  | 2 |  |  |  |
Arizona Public Service Company | Contaminated Groundwater Wells | Settled Litigation |  |  |  |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |  |  |  |
Number of plaintiffs | plaintiff | 2 |  |  |  |  |

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