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Long-Term Debt and Liquidity Matters - Narrative (Details) |  |  |  |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 25, 2022 USD ($) | Feb. 11, 2022 USD ($) MW | Jan. 06, 2022 USD ($) | Dec. 21, 2021 USD ($) | Mar. 31, 2022 USD ($) creditFacility | Mar. 31, 2021 USD ($) | Apr. 06, 2022 USD ($) | May 28, 2021 USD ($) | Dec. 23, 2020 USD ($) | Dec. 17, 2020 USD ($)
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Issuance of long-term debt |  |  |  |  | $ 312,052,000 | $ 150,000,000 |  |  |  |
Pinnacle West | Term Loan |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 150,000,000 |
Pinnacle West | Term Loan | Term Loan Maturing 2021 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 450,000,000 |  |  |  |  |  |
Issuance of long-term debt |  |  | $ 300,000,000 | $ 150,000,000 |  |  |  |  |  |
Pinnacle West | Revolving Credit Facility | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  | 200,000,000 |  |  | $ 200,000,000 |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to) |  |  |  |  |  |  |  | $ 300,000,000 |  |
Long-term line of credit |  |  |  |  | 0 |  |  |  |  |
Pinnacle West | Letter of Credit | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  | 0 |  |  |  |  |
Pinnacle West | Commercial paper | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  |  |  | 13,000,000 |  |  |  |  |
APS |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Percentage of capitalization |  |  |  |  |  |  |  |  |  | 7.00%
Capacity available for trade purchases |  |  |  |  |  |  |  |  |  | $ 500,000,000
Long-term debt limit |  |  |  |  |  |  |  |  |  | $ 7,500,000,000
Equity infusion from Pinnacle West |  |  | $ 150,000,000 |  | 150,000,000 |  |  |  |  |
APS | Subsequent Event |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Long-term debt limit |  |  |  |  |  |  | $ 8,000,000,000 |  |  |
APS | Revolving Credit Facility | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  | 1,000,000,000 |  |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to) |  |  |  |  | 1,400,000,000 |  |  |  |  |
APS | Revolving Credit Facility | Revolving Credit Facility Maturing May 2026, Facility One |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  | 500,000,000 |  |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to) |  |  |  |  | 700,000,000 |  |  |  |  |
APS | Revolving Credit Facility | Revolving Credit Facility Maturing May 2026, Facility Two |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  | 500,000,000 |  |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to) |  |  |  |  | 700,000,000 |  |  |  |  |
APS | Revolving Credit Facility | Revolving Credit Facility Maturing in 2022 and 2023 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  | $ 0 |  |  |  |  |
Number of line of credit facilities | creditFacility |  |  |  |  | 2 |  |  |  |  |
APS | Letter of Credit | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  | $ 0 |  |  |  |  |
APS | Commercial paper |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Maximum commercial paper support available under credit facility |  |  |  |  | 750,000,000 |  |  |  |  |
APS | Commercial paper | Revolving Credit Facility Maturing May 2026 |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  |  |  | 250,000,000 |  |  |  |  |
BCE |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Solar and battery storage capacity (in MW) | MW |  | 31 |  |  |  |  |  |  |  |
BCE | Term Loan | Non-Recourse Construction Term Loan Facility |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 42,000,000 |  |  |  |  |  |  |  |
BCE | Letter of Credit |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 5,000,000 |  |  |  |  |  |  |  |
BCE | Bridge Loan | Equity Bridge Loan Facility |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 33,000,000 |  |  |  |  |  |  |  |
Issuance of long-term debt |  |  |  |  | $ 12,000,000 |  |  |  |  |
BCE | Bridge Loan | Equity Bridge Loan Facility | Subsequent Event |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters |  |  |  |  |  |  |  |  |  |
Issuance of long-term debt | $ 7,000,000 |  |  |  |  |  |  |  |  |

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