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Lines of Credit and Short-Term Borrowings - Additional Information (Details) | Feb. 09, 2024 USD ($) | Dec. 12, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 30, 2023 | Apr. 10, 2023 USD ($) creditFacility | Apr. 09, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 17, 2020 USD ($)
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Arizona Public Service Company | ACC |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  | $ 500,000,000
Term Loan | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Notes issued |  | $ 350,000,000 |  |  |  |  |  |
Debt instrument term |  | 364 days |  |  |  |  |  |
Term Loan | Arizona Public Service Company | Subsequent Event |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Loan amount drawn | $ 350,000,000 |  |  |  |  |  |  |
Term Loan | Arizona Public Service Company | SOFR |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.00% |  |  |  |  |  |
Revolving credit facility | Revolving credit facility maturing May 2026 | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  |  |  | $ 500,000,000 |  |  |
Number of credit facilities | creditFacility |  |  |  |  | 2 |  |  |
Revolving credit facility | Revolving credit facility maturing May 2026, facility two | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders |  |  |  |  | $ 400,000,000 |  |  |
Revolving credit facility | Revolving credit facility maturing May 2026, facility one | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders |  |  |  |  | 400,000,000 |  |  |
Revolving credit facility | Revolving credit facility maturing in 2022 and 2023 | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Long-term line of credit |  |  | $ 0 |  |  |  |  |
Debt, weighted average interest rate |  |  |  | 5.46% |  |  |  |
Revolving credit facility | Revolving Credit Facility Maturing April 2028 | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  |  |  | 1,250,000,000 |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders |  |  |  |  | 1,650,000,000 |  |  |
Letter of Credit | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  | 27,000,000 |  |  |  |  |
Letter of Credit | Revolving Credit Facility Maturing April 2028 | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  | 0 |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  | 1,450,000,000 |  |  |  | $ 1,200,000,000 |
Long-term line of credit |  |  | 609,500,000 |  |  |  | 340,720,000 |
Commercial paper | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  | 1,250,000,000 |  |  |  | 1,000,000,000 |
Long-term line of credit |  |  | 532,850,000 |  |  |  | 325,000,000 |
Maximum commercial paper support available under credit facility |  |  |  |  | 1,000,000,000 | $ 750,000,000 |  |
Commercial paper | Revolving Credit Facility Maturing April 2028 | Arizona Public Service Company |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commercial paper |  |  | 533,000,000 |  |  |  |  |
Pinnacle West | Revolving credit facility | Revolving credit facility maturing May 2026 |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  |  |  | 200,000,000 |  |  |
Pinnacle West | Revolving credit facility | Revolving Credit Facility Maturing April 2028 |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  |  |  | 200,000,000 |  |  |
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders |  |  |  |  | $ 300,000,000 |  |  |
Long-term line of credit |  |  | 0 |  |  |  |  |
Pinnacle West | Letter of Credit | Revolving Credit Facility Maturing April 2028 |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  | 0 |  |  |  |  |
Pinnacle West | Commercial paper |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commitments under Credit Facilities |  |  | 200,000,000 |  |  |  | 200,000,000 |
Long-term line of credit |  |  | 76,650,000 |  |  |  | $ 15,720,000 |
Pinnacle West | Commercial paper | Revolving Credit Facility Maturing April 2028 |  |  |  |  |  |  |  |
Lines of Credit and Short-Term Borrowings |  |  |  |  |  |  |  |
Commercial paper |  |  | $ 77,000,000 |  |  |  |  |
Debt, weighted average interest rate |  |  | 5.47% |  |  |  |  |

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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 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://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//1943274/2147479440/944-210-S99-1 Reference 3: 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//1943274/2147479853/942-210-S99-1 + Details
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