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Long-Term Debt and Liquidity Matters - Additional Information (Details) $ in Millions |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jan. 06, 2023 USD ($) | Feb. 11, 2022 USD ($) MW | Dec. 31, 2023 USD ($) | Oct. 27, 2023 USD ($) | Dec. 16, 2022 USD ($) | Dec. 17, 2020 USD ($) | Dec. 16, 2020 USD ($)
Maximum |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Ratio of consolidated debt to consolidated capitalization (as a percent) |  |  |  | 65.00% |  |  |  |
Arizona Public Service Company |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |
Annual amount of approved equity infusions |  |  |  | $ 150 |  |  |  |
Increased in equity contributions |  |  |  |  | $ 500 |  |  |
Equity infusion from Pinnacle West |  | $ 150 |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  |  |  | 52.00% |  |  |  |
Arizona Public Service Company | ACC |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Long term debt authorization |  |  |  |  |  |  | $ 8,000 | $ 7,500
Bright Canyon Energy Corporation |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Solar plant capacity (in mw) | MW |  |  | 31 |  |  |  |  |
Battery storage capacity (in mwh) | MW |  |  | 20 |  |  |  |  |
5.55% Unsecured Senior Notes Due Aug 2033 | Arizona Public Service Company |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |
Interest rate (as a percent) | 5.55% |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Notes Issued | $ 500 |  |  |  |  |  |  |
Term Loan | Non-Recourse Construction Term Loan Facility | Bright Canyon Energy Corporation |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |
Notes issued |  |  | $ 36 |  |  |  |  |
Pinnacle West |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  |  |  | 60.00% |  |  |  |
Pinnacle West | Term Loan |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  | $ 175 |  |

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