Long-Term Debt and Liquidity Matters - Additional Information (Details) $ in Millions				12 Months Ended
	Jun. 30, 2023 USD ($)	Jan. 06, 2023 USD ($)	Feb. 11, 2022 USD ($) MW	Dec. 31, 2023 USD ($)	Oct. 27, 2023 USD ($)	Dec. 16, 2022 USD ($)	Dec. 17, 2020 USD ($)	Dec. 16, 2020 USD ($)
Maximum
Debt Provisions
Ratio of consolidated debt to consolidated capitalization (as a percent)				65.00%
Arizona Public Service Company
Long-Term Debt and Liquidity Matters [Line Items]
Annual amount of approved equity infusions				$ 150
Increased in equity contributions					$ 500
Equity infusion from Pinnacle West		$ 150
Debt Provisions
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)				52.00%
Arizona Public Service Company | ACC
Debt Provisions
Long term debt authorization							$ 8,000	$ 7,500
Bright Canyon Energy Corporation
Debt Provisions
Solar plant capacity (in mw) | MW			31
Battery storage capacity (in mwh) | MW			20
5.55% Unsecured Senior Notes Due Aug 2033 | Arizona Public Service Company
Long-Term Debt and Liquidity Matters [Line Items]
Interest rate (as a percent)	5.55%
Debt Provisions
Notes Issued	$ 500
Term Loan | Non-Recourse Construction Term Loan Facility | Bright Canyon Energy Corporation
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued			$ 36
Pinnacle West
Debt Provisions
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)				60.00%
Pinnacle West | Term Loan
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued						$ 175