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Lines of Credit and Short-Term Borrowings - Additional Information (Details) - USD ($) $ in Thousands |  |  |  |  | 1 Months Ended |  |  |  |  |  |  |
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Dec. 20, 2024 | Dec. 05, 2024 | Feb. 09, 2024 | Dec. 12, 2023 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 17, 2024 | Aug. 02, 2024 | Dec. 31, 2023 | Oct. 27, 2023 | Apr. 10, 2023 | Apr. 09, 2023
Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Requested equity contributions limit |  |  |  |  |  |  | $ 9,500,000 |  |  | $ 500,000 |  |
Arizona Public Service Company | ACC |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Percentage of APS's capitalization used in calculation of short-term debt authorization |  |  |  |  |  |  | 7.00% |  |  |  |  |
Required amount to be used in purchases of natural gas and power which is used in calculation of short-term debt authorization |  |  |  |  |  |  | $ 500,000 |  |  |  |  |
Term Loan | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  | 364 days |  | 364 days |  |  |  |  |  |  |  |
Notes issued |  | $ 400,000 |  | $ 350,000 |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 0.90% |  | 1.00% |  |  |  |  |  |  |  |
Loan amount drawn |  |  | $ 350,000 |  |  |  |  |  |  |  |  |
Revolving credit facility | Revolving Credit Facility Maturing April 2029 | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  |  |  |  | $ 1,250,000 |  |  |  |
Accordion feature, increase limit |  |  |  |  |  |  |  | 400,000 |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders |  |  |  |  |  |  |  | 1,650,000 |  |  |  |
Long-term line of credit |  |  |  |  |  | $ 0 |  |  |  |  |  |
Debt, weighted average interest rate |  |  |  |  |  | 4.62% |  |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  |  | $ 2,050,000 |  |  | $ 1,450,000 |  |  |
Long-term line of credit |  |  |  |  |  | 568,450 |  |  | 609,500 |  |  |
Commercial paper | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  |  | 1,650,000 |  |  | 1,250,000 |  |  |
Maximum commercial paper support available under credit facility |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 | $ 750,000
Long-term line of credit |  |  |  |  |  | 339,900 |  |  | 532,850 |  |  |
Commercial paper | Revolving Credit Facility Maturing April 2029 | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  |  |  |  | 340,000 |  |  |  |  |  |
Letter of Credit | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  | 18,000 |  |  |  |  |  |
Letter of Credit | Revolving Credit Facility Maturing April 2029 | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  | 0 |  |  |  |  |  |
Pinnacle West | Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  | 364 days |  |  |  |  |  |  |  |  |  |
Notes issued |  | $ 200,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 0.95% |  |  |  |  |  |  |  |  |  |
Loan amount drawn | $ 200,000 |  |  |  |  |  |  |  |  |  |  |
Pinnacle West | Term Loan | Arizona Public Service Company |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  | 364 days |  |  |  |  |  |  |
Pinnacle West | Revolving credit facility | Revolving Credit Facility Maturing April 2029 |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  |  |  |  | 200,000 |  |  |  |
Accordion feature, increase limit |  |  |  |  |  |  |  | 300,000 |  |  |  |
Long-term line of credit |  |  |  |  |  | 0 |  |  |  |  |  |
Pinnacle West | Commercial paper |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity on credit facility |  |  |  |  |  | 400,000 |  |  | 200,000 |  |  |
Long-term line of credit |  |  |  |  |  | $ 228,550 |  |  | $ 76,650 |  |  |
Pinnacle West | Commercial paper | Revolving Credit Facility Maturing April 2029 |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  | $ 29,000 |  |  |  |
Debt, weighted average interest rate |  |  |  |  |  | 4.58% |  |  |  |  |  |
Pinnacle West | Letter of Credit | Revolving Credit Facility Maturing April 2029 |  |  |  |  |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  | $ 0 |  |  |  |  |  |

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- Definition Represents the percentage of capitalization which is used to calculate the short-term debt authorization pursuant to an order from a regulatory authority. + References No definition available. + Details
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- Definition Represents the fixed amount required to be used for purchases of natural gas and power which is used to calculate the short-term debt authorization pursuant to an order from a regulatory authority. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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