Regulatory Matters - Retail Rate Case Filing (Details)	Oct. 28, 2022 USD ($) $ / kWh	Sep. 23, 2022 MW	Jun. 30, 2022 USD ($)	Mar. 31, 2022 MW	Oct. 27, 2021 USD ($)	Aug. 02, 2021 USD ($)	Nov. 06, 2020 USD ($)	Oct. 31, 2019 USD ($) $ / kWh MW	Jun. 30, 2019 USD ($)	Aug. 13, 2018 USD ($)	Mar. 27, 2017 USD ($)	Dec. 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 04, 2020 USD ($)	Oct. 02, 2020 USD ($)
Residential Utility Consumer Office
Public Utilities, General Disclosures [Line Items]
Revenue increase (decrease)																$ (50,100,000)	$ (20,800,000)
Average annual customer bill increase (decrease), percent																(1.52%)	(0.63%)
Recommended return on equity, percentage																	8.74%
Increment of fair value rate, percentage																	0.00%
ACC
Public Utilities, General Disclosures [Line Items]
Revenue increase (decrease)							$ 169,000,000									$ 59,800,000	$ 89,700,000
Average annual customer bill increase (decrease), percent							5.14%									1.82%	2.70%
Recommended return on equity, percentage							10.00%										9.40%
Alternative, percentage																	0.30%
Increment of fair value rate, percentage							0.80%										0.00%
ACC | Coal Community Transition Plan
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders							$ 25,000,000								$ 25,200,000
Amount funded by customers, term							10 years
Amount funded by customers							$ 100,000,000
ACC | Coal Community Transition Plan | Navajo Nation, Economic Development Organization
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders							$ 1,250,000
Amount funded by shareholders, term							5 years
ACC | Coal Community Transition Plan | Navajo Nation, Electrification Projects
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders							$ 10,000,000					$ 7,000,000	$ 500,000		$ 10,000,000
Amount funded by customers							10,000,000
ACC | Coal Community Transition Plan | Navajo Nation, Transmission Revenue Sharing
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders							$ 2,500,000
ACC | Coal Community Transition Plan | Navajo County Communities, Cholla Power Plant Closure
Public Utilities, General Disclosures [Line Items]
Amount funded by customers, term							5 years
Amount funded by customers							$ 12,000,000
ACC | Coal Community Transition Plan | Navajo Nation, Generation Station
Public Utilities, General Disclosures [Line Items]
Amount funded by customers							$ 3,700,000
ACC | Coal Community Transition Plan | Navajo Nation, Generation Station
Public Utilities, General Disclosures [Line Items]
Amount funded by customers														$ 900,000
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Tribe
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates													1,000,000
ACC | Coal Community Transition Plan | Navajo Nation
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates													3,330,000
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Reservation
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates													1,250,000
ACC | Coal Community Transition Plan | Navajo County Communities
Public Utilities, General Disclosures [Line Items]
Regulatory matters, amounts recoverable by rates													500,000
ACC | Coal Community Transition Plan | Navajo County Communities, CCT and Economic Development
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders													1,100,000
ACC | Coal Community Transition Plan | Navajo Nation, Hopi Tribe for CCT and Economic Development
Public Utilities, General Disclosures [Line Items]
Amount funded by shareholders													$ 1,250,000
ACC | Arizona Public Service Company
Public Utilities, General Disclosures [Line Items]
Total revenue deficiency	$ 772,000,000
Proposed annual revenue increase								$ 184,000,000		$ (86,500,000)
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%							5.40%
Rate matter, cost base rate			$ 10,500,000,000						$ 8,870,000,000
Base fuel rate (in dollars per kWh) | $ / kWh	0.038321							0.030168
Base rate decrease, elimination of tax expense adjustment mechanism								$ 115,000,000
Approximate percentage of increase in average customer bill								5.60%
Funding limited income crisis bill program								$ 1,250,000
Commercial customers, market pricing, threshold | MW		140		280				200
Revenue increase (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%
Settlement agreement, net retail base rate increase											$ 94,600,000
Settlement agreement, non fuel and non depreciation base rate, increase											87,200,000
Fuel-related base rate decrease											53,600,000
Settlement agreement, base rate increase, changes in depreciation schedules											$ 61,000,000
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]
Amount funded by customers, term						10 years
Amount funded by customers						$ 50,000,000
Disallowance of annual amortization percentage						15.00%
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					$ 500,000	$ 5,000,000
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					$ 1,000,000	$ 1,675,000
Amount not recoverable					215,500,000
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					$ 10,000,000
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					$ 1,250,000
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)					4,800,000
Amount funded by shareholders					$ 1,250,000
Minimum | ACC | Arizona Public Service Company
Public Utilities, General Disclosures [Line Items]
Annual increase in retail base rates	$ 460,000,000							$ 69,000,000