Regulatory Matters - Retail Rate Case Filing (Details) $ in Thousands	Feb. 22, 2024 USD ($)	Jan. 25, 2024 USD ($) $ / MWh	Jul. 26, 2023 USD ($) $ / kWh	Jul. 12, 2023 USD ($) $ / kWh	Jul. 11, 2023 $ / kWh	Jun. 14, 2023 USD ($)	Oct. 28, 2022 USD ($) $ / kWh	Jun. 30, 2022 USD ($)	Dec. 17, 2021 USD ($)	Oct. 27, 2021 USD ($)	Aug. 02, 2021 USD ($)	Feb. 23, 2024 USD ($)	Nov. 06, 2023 USD ($)	Nov. 05, 2023 USD ($)	Aug. 04, 2023 USD ($)	Aug. 03, 2023 USD ($)	Jun. 15, 2023 USD ($)	Mar. 06, 2023	Dec. 31, 2022 USD ($)	Nov. 30, 2022 USD ($)
Subsequent Event
Public Utilities, General Disclosures [Line Items]
Revenue increase (decrease)	$ 491,700	$ 523,100
ACC
Public Utilities, General Disclosures [Line Items]
Base fuel rate (in dollars per kWh) | $ / kWh			0.006	0.006	0.004
Revenue increase (decrease)			$ 281,900	$ 383,100									$ 282,700	$ 281,900			$ 251,000
Alternative revenue increase (decrease)																	$ 312,000
Recommended return on equity, percentage			9.68%	10.25%													9.60%
Increment of fair value rate, percentage			0.50%	0.50%													0.00%
Alternative increment of fair value rate percentage																	0.0075
Hypothetical capital structure of equity layer percentage																	0.46
ACC | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Recommended return on equity, percentage	9.55%	9.55%
Increment of fair value rate, percentage	0.25%	0.25%
ACC | Coal Community Transition Plan | Navajo Nation, Electrification Projects
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders																			$ 7,000
ACC | Coal Community Transition Plan | Navajo Nation, Electrification Projects | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders												$ 1,000
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Tribe | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates												1,000
ACC | Coal Community Transition Plan | Navajo Nation | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates												6,660
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Reservation | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates												1,250
ACC | Coal Community Transition Plan | Navajo County Communities | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates												500
ACC | Coal Community Transition Plan | Navajo County Communities, CCT and Economic Development | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders												1,100
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Tribe for CCT and Economic Development | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders												$ 1,250
ACC | Coal Community Transition Plan | Navajo and Hopi Tribes
Public Utilities, General Disclosures [Line Items]
Disbursement																				$ 1,250
ACC | Arizona Public Service Company
Public Utilities, General Disclosures [Line Items]
Total revenue deficiency							$ 772,000
Revenue increase (decrease)													$ 376,200		$ 377,700	$ 383,100
Regulatory matters, customer bill impact rate				11.30%									11.10%		11.20%
Regulatory matters, no of basis penalty point									0.0020	20								0.0020
Reversal of basis point penalty						0.0020
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission
Public Utilities, General Disclosures [Line Items]
Approximate percentage of increase in average residential customer bill							13.60%
Rate matter, cost base rate								$ 10,500,000
Base fuel rate (in dollars per kWh) | $ / kWh							0.038321
Revenue increase (decrease)											$ (111,000)
Recommended return on equity, percentage									8.90%	8.70%	9.16%
Increment of fair value rate, percentage											0.30%
Reduction on equity percentage											0.03%
Effective fair value percentage											4.95%
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Base fuel rate (in dollars per kWh) | $ / MWh		0.006
Effective fair value percentage	4.39%	4.36%
Increases in annual revenue	$ 253,400
Increase to the typical residential customer’s bill	8.00%
Prepaid pension asset rate		5.00%
Pension and otherpost retirement and post employment benefit plans		5.35%
Retention of REAC		$ 1,900
Transfer to LFCR		$ 27,100
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo Nation, Economic Development Organization
Public Utilities, General Disclosures [Line Items]
Disallowance of annual amortization percentage											15.00%
Amount funded by customers, term											10 years
Amount funded by customers											$ 50,000
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo County Communities, Cholla Power Plant Closure
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders										$ 500	$ 5,000
Amount funded by shareholders, term										60 days	5 years
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo Nation, Hopi Tribe
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders										$ 1,000	$ 1,675
Amount funded by shareholders, term										60 days
Amount not recoverable										$ 215,500
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo Nation
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders										$ 10,000
Amount funded by shareholders, term										3 years
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo Nation, Hopi Reservation
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders										$ 1,250
ACC | Arizona Public Service Company | Retail Rate Case Filing with Arizona Corporation Commission | Coal Community Transition Plan | Navajo Nation Reservation
Public Utilities, General Disclosures [Line Items]
Revenue increase (decrease)										(4,800)
Recommended return on equity, percentage						8.70%
Amount funded by shareholders										$ 1,250
Disallowance of plant investments									$ 215,500
Requested reversal of rate adjustment						$ 215,500
Lost revenue recovery						$ 59,600
Residential Utilities Consumer Office | ACC
Public Utilities, General Disclosures [Line Items]
Revenue increase (decrease)																	$ 84,900
Recommended return on equity, percentage																	8.20%
Increment of fair value rate, percentage																	0.00%
Alternate recommended return on equity percentage																	0.087
Minimum | ACC | Arizona Public Service Company
Public Utilities, General Disclosures [Line Items]
Annual increase in retail base rates							$ 460,000
Maximum | ACC
Public Utilities, General Disclosures [Line Items]
Increment of fair value rate, percentage					1.00%