Long-Term Debt and Liquidity Matters - Narrative (Details)				6 Months Ended
	Jun. 30, 2023 USD ($)	Jan. 06, 2023 USD ($)	Feb. 11, 2022 USD ($) MW	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Apr. 10, 2023 USD ($)	Apr. 09, 2023 USD ($) creditFacility	Dec. 16, 2022 USD ($)
Long-Term Debt and Liquidity Matters
Issuance of long-term debt				$ 689,247,000	$ 325,802,000
Pinnacle West | Term Loan
Long-Term Debt and Liquidity Matters
Debt instrument, face amount								$ 175,000,000
Pinnacle West | Revolving Credit Facility | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility						$ 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			0
Pinnacle West | Letter of Credit | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	0			0
Pinnacle West | Commercial Paper | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Commercial paper	20,000,000			20,000,000
APS
Long-Term Debt and Liquidity Matters
Equity infusion from Pinnacle West		$ 150,000,000
Issuance of long-term debt				$ 496,025,000	$ 0
APS | 5.55% Unsecured Senior Notes Due Aug 2033
Long-Term Debt and Liquidity Matters
Notes issued	$ 500,000,000
Debt instrument, interest rate	5.55%			5.55%
APS | Revolving Credit Facility | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility						1,250,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)						1,650,000,000
APS | Revolving Credit Facility | Revolving Credit Facility Maturing April 2028, Facility One
Long-Term Debt and Liquidity Matters
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)						400,000,000
APS | Revolving Credit Facility | Revolving Credit Facility Maturing April 2028, 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)						400,000,000
APS | Revolving Credit Facility | Revolving Credit Facility Maturing in 2022 and 2023
Long-Term Debt and Liquidity Matters
Long-term line of credit	$ 0			$ 0
Number of line of credit facilities | creditFacility							2
APS | Letter of Credit
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	12,000,000			12,000,000
APS | Letter of Credit | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	0			0
APS | Commercial Paper
Long-Term Debt and Liquidity Matters
Maximum commercial paper support available under credit facility						$ 1,000,000,000	$ 750,000,000
APS | Commercial Paper | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Commercial paper	285,000,000			285,000,000
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
Long-term line of credit	38,000,000			38,000,000
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 | Letter of Credit | Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	$ 2,500,000			2,500,000
BCE | Bridge Loan | Equity Bridge Loan Facility
Long-Term Debt and Liquidity Matters
Debt instrument, face amount			33,000,000
BCE | Bridge Loan | Non-Recourse Construction Term Loan Facility
Long-Term Debt and Liquidity Matters
Issuance of long-term debt				$ 31,000,000
BCE | Pinnacle West | Bridge Loan
Long-Term Debt and Liquidity Matters
Debt guarantee			$ 42,000,000