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Commitments and Contingencies - Estimated Coal Take-or-pay Commitments and Actual Amount Purchased (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
Total take-or-pay commitments | $ 184,007 | $ 179,255 |
Arizona Public Service Company |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
2024 | 1,034,000 |  |
2025 | 1,190,000 |  |
2026 | 1,310,000 |  |
2027 | 1,284,000 |  |
2028 | 1,292,000 |  |
Thereafter | 14,700,000 |  |
Total take-or-pay commitments | 184,007 | 179,255 |
Arizona Public Service Company | Coal Take-or-Pay Commitments |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
2024 | 208,694 |  |
2025 | 229,111 |  |
2026 | 221,122 |  |
2027 | 200,256 |  |
2028 | 205,237 |  |
Thereafter | 647,377 |  |
Total take-or-pay commitments | 1,700,000 |  |
Present value of commitments | 1,400,000 |  |
Total purchases | 255,219 | 305,502 | $ 219,958
Arizona Public Service Company | Renewable Energy Credits |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
2024 | 29,000 |  |
2025 | 27,000 |  |
2026 | 24,000 |  |
2027 | 20,000 |  |
2028 | 17,000 |  |
Thereafter | 52,000 |  |
Arizona Public Service Company | Coal Mine Reclamation Obligations |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
2024 | 19,000 |  |
2025 | 20,000 |  |
2026 | 21,000 |  |
2027 | 22,000 |  |
2028 | 23,000 |  |
Thereafter | 2,000 |  |
Arizona Public Service Company | Coal Mine Reclamation Balance Sheet Obligations |  |  |
Fuel and Purchased Power Commitments and Purchase Obligations [Abstract] |  |  |
Total take-or-pay commitments | $ 184,000 | $ 179,000 |

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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482648/440-10-50-4 + Details
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