Long-Term Debt and Liquidity Matters - Additional Information (Details) $ / shares in Units, $ in Thousands														1 Months Ended		12 Months Ended
	Dec. 23, 2024 USD ($)	Dec. 20, 2024 USD ($)	Dec. 17, 2024 USD ($)	Dec. 05, 2024 USD ($)	Jun. 17, 2024 USD ($)	Jun. 12, 2024 USD ($)	Jun. 10, 2024 USD ($)	Jun. 06, 2024 USD ($)	Apr. 19, 2024 USD ($)	Feb. 28, 2024 USD ($) shares	Feb. 09, 2024 USD ($)	Dec. 12, 2023 USD ($)	Feb. 11, 2022 USD ($) MW	Dec. 31, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) day	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	May 09, 2024 USD ($)	Apr. 18, 2024 USD ($)	Oct. 27, 2023 USD ($)	Aug. 04, 2023 USD ($)	Dec. 16, 2022 USD ($)
Long-Term Debt and Liquidity Matters [Line Items]
Short-term debt repayments under term loan facility																$ 350,000	$ 0	$ 0
February 2024 Forward Sale Agreements
Long-Term Debt and Liquidity Matters [Line Items]
Sale of stock, settlement terms (in shares) | shares										5,377,115
Proceeds from issuance of common stock										$ 345,000
Number of shares issued in transaction (in shares) | shares										11,240,601
November 2024 Forward Sale Agreement
Long-Term Debt and Liquidity Matters [Line Items]
Sale of stock, settlement terms (in shares) | shares																552,833
Proceeds from issuance of common stock																$ 50,000
Maximum
Debt Provisions
Ratio of consolidated debt to consolidated capitalization (as a percent)														65.00%		65.00%
Arizona Public Service Company
Long-Term Debt and Liquidity Matters [Line Items]
Short-term debt repayments under term loan facility																$ 350,000	0	$ 0
Long-term debt														$ 7,543,975		7,543,975
Annual amount of approved equity infusions																$ 150,000
Requested equity contributions limit			$ 9,500,000																		$ 500,000
Public utilities, request to permanently modify permitted yearly equity infusions			2.50%						2.50%
Public utilities, number of basis point of approved rate														0.0050		0.0050
Equity infusion from Pinnacle West	$ 345,000					$ 450,000
Public utility, permitted equity infusions, percentage									2.50%
Debt Provisions
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)														49.00%		49.00%
Arizona Public Service Company | ACC
Long-Term Debt and Liquidity Matters [Line Items]
Public utility order long term debt, authorized									$ 9,500,000
Debt Provisions
Long term debt authorization									$ 9,500,000											$ 8,000,000
Bright Canyon Energy Corporation
Long-Term Debt and Liquidity Matters [Line Items]
Solar plant capacity (in mw) | MW													31
Battery storage capacity (in mwh) | MW													20
Pinnacle West | Forward Sale Agreements
Long-Term Debt and Liquidity Matters [Line Items]
Number of shares issued in transaction (in shares) | shares														5,377,115
Proceeds from issuance of common stock														$ 345,000
Pinnacle West | February 2024 Forward Sale Agreements
Long-Term Debt and Liquidity Matters [Line Items]
Sale of stock, settlement terms (in shares) | shares																5,863,486
Proceeds from issuance of common stock																$ 377,000
Pinnacle West | November 2024 Forward Sale Agreement
Long-Term Debt and Liquidity Matters [Line Items]
Sale of stock, settlement terms (in shares) | shares																552,833
Proceeds from issuance of common stock																$ 50,000
Term Loan | Arizona Public Service Company
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued				$ 400,000								$ 350,000
Debt instrument term				364 days								364 days
Debt instrument, basis spread on variable rate				0.90%								1.00%
Loan amount drawn											$ 350,000
Unsecured Senior Notes Due 2024 | Arizona Public Service Company | Senior Notes
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued																			$ 450,000
Repayments of unsecured debt					$ 250,000
Interest rate (as a percent)					3.35%														5.70%
Term Loan | Non-Recourse Construction Term Loan Facility | Bright Canyon Energy Corporation
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued													$ 36,000									$ 36,000
Bridge Loan | Equity Bridge Loan Facility | Bright Canyon Energy Corporation
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued													$ 31,000									$ 31,000
Debt Provisions
Term loans														0		0
Pinnacle West
Long-Term Debt and Liquidity Matters [Line Items]
Long-term debt														$ 8,918,975		$ 8,918,975
Debt Provisions
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)														59.00%		59.00%
Pinnacle West | Convertible Notes Due Maturing June 2027 | Convertible Debt
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued														$ 525,000	$ 525,000	$ 525,000
Interest rate (as a percent)														4.75%	4.75%	4.75%
Debt instrument, convertible, conversion ratio																0.108338
Debt instrument, convertible, conversion price (in usd per share) | $ / shares														$ 92.30		$ 92.30
Debt instrument redemption price percentage																100.00%
Long-term debt														$ 525,000		$ 525,000
Unamortized debt issuance expense														8,000		8,000
Convertible debt, fair value														552,000		552,000
Pinnacle West | Convertible Notes Due Maturing June 2027 | Convertible Debt | Debt Conversion Terms One
Long-Term Debt and Liquidity Matters [Line Items]
Debt instrument, convertible, threshold trading days | day															20
Debt instrument, convertible, threshold consecutive trading days | day															30
Debt instrument, convertible, threshold percentage of stock price trigger															130.00%
Pinnacle West | Convertible Notes Due Maturing June 2027 | Convertible Debt | Debt Conversion Terms Two
Long-Term Debt and Liquidity Matters [Line Items]
Debt instrument, convertible, threshold trading days | day															5
Debt instrument, convertible, threshold consecutive trading days | day															10
Debt instrument, convertible, threshold percentage of stock price trigger															98.00%
Pinnacle West | Term Loan
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued				$ 200,000
Debt instrument term				364 days
Short-term debt repayments under term loan facility		$ 200,000
Debt instrument, basis spread on variable rate				0.95%
Loan amount drawn		$ 200,000
Pinnacle West | Term Loan | Arizona Public Service Company
Long-Term Debt and Liquidity Matters [Line Items]
Debt instrument term															364 days
Short-term debt repayments under term loan facility															$ 350,000
Pinnacle West | Floating Rate Notes Due 2026 | Unsecured Debt
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued														350,000		350,000
Long-term debt														350,000		350,000	$ 0
Debt instrument, basis spread on variable rate															0.82%
Pinnacle West | 450 Million Term Loan Maturing December 2024
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued								$ 450,000						450,000		450,000
Repayments of unsecured debt								$ 250,000
Pinnacle West | 175 Million Term Loan Maturing December 2024
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued														$ 175,000		$ 175,000
Repayments of unsecured debt							$ 175,000
Pinnacle West | Term Loan
Long-Term Debt and Liquidity Matters [Line Items]
Notes issued																							$ 175,000