Regulatory Matters - Retail Rate Case Filing (Details)														12 Months Ended
	Mar. 06, 2023 USD ($)	Oct. 28, 2022 USD ($) $ / kWh	Sep. 23, 2022 MW	Jul. 12, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 MW	Dec. 17, 2021 USD ($)	Oct. 27, 2021 USD ($)	Aug. 02, 2021 USD ($)	Jun. 07, 2021 USD ($)	Jul. 01, 2020 USD ($)	Aug. 13, 2018 USD ($)	Mar. 27, 2017 USD ($)	Dec. 31, 2020	Jul. 01, 2022 USD ($)	Apr. 30, 2022 USD ($)	Dec. 09, 2021 USD ($)	Jul. 01, 2021 USD ($)
ACC | APS
Public Utilities, General Disclosures [Line Items]
Total revenue deficiency		$ 772,000,000
Proposed annual revenue increase												$ (86,500,000)
Regulatory matters, no of basis penalty point	0.0020
Program term														18 years
Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS
Public Utilities, General Disclosures [Line Items]
Approximate percentage of increase in average residential customer bill		13.60%
Rate matter, cost base rate					$ 10,500,000,000
Base fuel rate (in dollars per kWh) | $ / kWh		0.038321
Revenue decrease									$ 111,000,000
Recommended return on equity, percentage								8.70%	9.16%
Increment of fair value rate, percentage									0.30%
Reduction on equity percentage									0.03%
Effective fair value percentage									4.95%
Net retail base rate, increase													$ 94,600,000
Non-fuel and non-depreciation base rate, increase													87,200,000
Fuel-related base rate decrease													53,600,000
Base rate increase, changes in depreciation schedules													$ 61,000,000
Commercial customers, market pricing, threshold | MW			140			280
RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Amount of proposed budget											$ 84,700,000				$ 86,200,000		$ 100,500,000	$ 93,100,000
Revenue requirements											$ 4,500,000
Authorized amount to be collected										$ 68,300,000
Coal Community Transition Plan | ACC | Navajo Nation, Electrification Projects
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders																$ 1,000,000
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Tribe
Public Utilities, General Disclosures [Line Items]
Amount recoverable through rates related to the CCT																1,000,000
Coal Community Transition Plan | ACC | Navajo Nation
Public Utilities, General Disclosures [Line Items]
Amount recoverable through rates related to the CCT																6,660,000
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Reservation
Public Utilities, General Disclosures [Line Items]
Amount recoverable through rates related to the CCT																1,250,000
Coal Community Transition Plan | ACC | Navajo County Communities
Public Utilities, General Disclosures [Line Items]
Amount recoverable through rates related to the CCT																500,000
Coal Community Transition Plan | ACC | Navajo County Communities, CCT and Economic Development
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders																1,100,000
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Tribe for CCT and Economic Development
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders																$ 1,250,000
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Economic Development Organization
Public Utilities, General Disclosures [Line Items]
Disallowance of annual amortization percentage									15.00%
Amount funded by customers									$ 50,000,000
Amount funded by customers, term									10 years
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo County Communities
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders								$ 500,000	$ 5,000,000
Amount funded by shareholders, term								60 days	5 years
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Hopi Tribe
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders								$ 1,000,000	$ 1,675,000
Amount funded by shareholders, term								60 days
Amount not recoverable								$ 215,500,000
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders								$ 10,000,000
Amount funded by shareholders, term								3 years
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Hopi Reservation
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders								$ 1,250,000
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation Reservation
Public Utilities, General Disclosures [Line Items]
Revenue decrease								4,800,000
Amount funded by shareholders								$ 1,250,000
Disallowance of plant investments	$ 215,500,000						$ 215,500,000
Solar Communities | RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Program term				3 years							3 years
Minimum | ACC | APS
Public Utilities, General Disclosures [Line Items]
Annual increase in retail base rates		$ 460,000,000
Minimum | RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Authorized spending				$ 20,000,000
Minimum | Solar Communities | RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Required annual capital investment											$ 10,000,000
Maximum | RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Authorized spending				$ 30,000,000
Maximum | Solar Communities | RES 2018 | ACC | APS
Public Utilities, General Disclosures [Line Items]
Required annual capital investment											$ 15,000,000