Lines of Credit and Short-Term Borrowings - Additional Information (Details) $ in Thousands							12 Months Ended
	Feb. 18, 2026 USD ($) extensionOption	Dec. 03, 2025 USD ($)	Aug. 15, 2025	Apr. 29, 2025 USD ($)	Dec. 20, 2024 USD ($)	Dec. 05, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 17, 2024 USD ($)
Long-Term Debt and Liquidity Matters [Line Items]
Short-term debt repayments under term loan facility							$ 600,000	$ 350,000	$ 0
APS
Long-Term Debt and Liquidity Matters [Line Items]
Short-term debt repayments under term loan facility							400,000	350,000	0
Requested equity contributions limit										$ 9,500,000
APS | ACC
Long-Term Debt and Liquidity Matters [Line Items]
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 loans | APS
Long-Term Debt and Liquidity Matters [Line Items]
Debt instrument term			364 days			364 days
Notes issued						$ 400,000
Debt instrument, basis spread on variable rate						0.90%
Proceeds from issuance of unsecured debt				$ 400,000
Revolving credit facility | Revolving Credit Facility Maturing April 2029 | APS
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							1,250,000
Long-term line of credit							$ 0
Debt, weighted average interest rate							3.83%
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders							$ 1,650,000
Revolving credit facility | Revolving Credit Facility Maturing April 2029 | Subsequent Event | APS
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility	$ 1,700,000
Accordion feature, increase limit	$ 2,100,000
Number of extension options | extensionOption	2
Debt instrument, extension option period	1 year
Letter of Credit | APS
Long-Term Debt and Liquidity Matters [Line Items]
Outstanding letters of credit							30,400
Letter of Credit | Revolving Credit Facility Maturing April 2029 | APS
Long-Term Debt and Liquidity Matters [Line Items]
Outstanding letters of credit							0
Commercial paper
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							1,625,000	2,050,000
Long-term line of credit							757,005	568,450
Commercial paper | APS
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							1,250,000	1,650,000
Long-term line of credit							507,305	339,900
Maximum commercial paper support available under credit facility							1,000,000
Commercial paper | Revolving Credit Facility Maturing April 2029 | APS
Long-Term Debt and Liquidity Matters [Line Items]
Commercial paper							507,000
Commercial paper | Revolving Credit Facility Maturing April 2029 | Subsequent Event | APS
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility	$ 1,500,000
Pinnacle West Consolidated
Long-Term Debt and Liquidity Matters [Line Items]
Short-term debt repayments under term loan facility							$ 200,000	0	$ 0
Pinnacle West Consolidated | Term loans
Long-Term Debt and Liquidity Matters [Line Items]
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 Consolidated | Term Loan Facility Maturing December 3, 2026
Long-Term Debt and Liquidity Matters [Line Items]
Debt instrument term							364 days
Notes issued							$ 175,000
Debt instrument, basis spread on variable rate							0.80%
Loan amount drawn		$ 175,000
Pinnacle West Consolidated | Revolving credit facility | Revolving Credit Facility Maturing April 2029
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							$ 200,000
Accordion feature, increase limit							300,000
Long-term line of credit							0
Pinnacle West Consolidated | Revolving credit facility | Revolving Credit Facility Maturing February 2031 | Subsequent Event
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility	300,000
Accordion feature, increase limit	$ 400,000
Number of extension options | extensionOption	2
Debt instrument, extension option period	1 year
Pinnacle West Consolidated | Letter of Credit | Revolving Credit Facility Maturing April 2029
Long-Term Debt and Liquidity Matters [Line Items]
Outstanding letters of credit							0
Pinnacle West Consolidated | Commercial paper
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							375,000	400,000
Long-term line of credit							249,700	$ 228,550
Pinnacle West Consolidated | Commercial paper | Revolving Credit Facility Maturing April 2029
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility							200,000
Commercial paper							$ 75,000
Debt, weighted average interest rate							3.81%
Pinnacle West Consolidated | Commercial paper | Revolving Credit Facility Maturing February 2031 | Subsequent Event
Long-Term Debt and Liquidity Matters [Line Items]
Current borrowing capacity on credit facility	$ 300,000