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Long-Term Debt and Liquidity Matters - Additional Information (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 11, 2022 | Jan. 06, 2022 | Dec. 21, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 23, 2020 | Dec. 17, 2020 | Dec. 16, 2020 | May 05, 2020
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 746,999 | $ 1,596,672 | $ 1,092,188 |  |  |  |
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] |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 446,999 | 1,099,722 | 1,092,188 |  |  |  |
Equity infusion from Pinnacle West |  |  |  | $ 150,000 | 150,000 | 150,000 |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  |  |  | 50.00% |  |  |  |  |  |
Arizona Public Service Company | ACC |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Long term debt authorization |  |  |  |  |  |  |  | $ 7,500,000 | $ 5,900,000 |
Subsequent Event | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Equity infusion from Pinnacle West |  | $ 150,000 |  |  |  |  |  |  |  |
Unsecured Senior Notes Maturing 2031 | Senior Notes | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued |  |  | $ 450,000 |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 2.20% |  |  |  |  |  |  |
Term Loan | Non-Recourse Construction Term Loan Facility | Subsequent Event | Bright Canyon Energy Corporation |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued | $ 42,000 |  |  |  |  |  |  |  |  |
Bridge Loan | Equity Bridge Loan Facility | Subsequent Event | Bright Canyon Energy Corporation |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued | 33,000 |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt | 12,000 |  |  |  |  |  |  |  |  |
Letter of Credit | Subsequent Event | Bright Canyon Energy Corporation |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued | $ 5,000 |  |  |  |  |  |  |  |  |
Pinnacle West |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  | $ 300,000 | $ 496,950 | $ 0 |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  |  |  | 56.00% |  |  |  |  |  |
Pinnacle West | Term Loan |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  | $ 150,000 |  |  | $ 31,000
Pinnacle West | Term Loan | Term Loan Maturing 2021 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issued |  |  | $ 450,000 |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  | $ 150,000 |  |  |  |  |  |  |
Pinnacle West | Term Loan | Term Loan Maturing 2021 | Subsequent Event |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  | $ 300,000 |  |  |  |  |  |  |  |

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