Regulatory Matters - Cost Recovery Mechanisms (Details)																															1 Months Ended	12 Months Ended
	Feb. 23, 2023 USD ($) $ / MWh	Feb. 01, 2023 USD ($) $ / kWh	Oct. 31, 2022 USD ($)	Sep. 23, 2022 MW	Jul. 12, 2022 USD ($) $ / kWh	Jun. 01, 2022 USD ($)	Mar. 31, 2022 MW	Feb. 15, 2022 USD ($)	Feb. 01, 2022 USD ($) $ / KWH_Kilowatt_hour $ / kWh	Nov. 01, 2021 $ / kWh	Oct. 01, 2021 $ / kWh	Jun. 07, 2021 USD ($)	Jun. 01, 2021 USD ($)	Apr. 01, 2021 $ / kWh	Feb. 22, 2021 USD ($)	Feb. 15, 2021 USD ($)	Feb. 01, 2021 USD ($) $ / kWh	Aug. 20, 2020 USD ($) customer	Jun. 01, 2020 USD ($)	May 01, 2020 $ / kWh	Feb. 14, 2020 USD ($)	Feb. 01, 2020 $ / kWh	Nov. 14, 2019 USD ($) customer	Oct. 31, 2019 USD ($) $ / KWH_Kilowatt_hour MW	Oct. 29, 2019 USD ($)	May 01, 2019 $ / kWh	Apr. 10, 2019	Aug. 13, 2018 USD ($)	Nov. 20, 2017 USD ($)	Sep. 01, 2017	Mar. 31, 2021	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) program MW	Dec. 31, 2017 $ / kWh	Dec. 31, 2017 $ / KWH_Kilowatt_hour	Nov. 30, 2022 USD ($)	Jul. 01, 2022 USD ($)	Apr. 18, 2022 USD ($)	Dec. 17, 2021 USD ($)	Dec. 09, 2021 USD ($)	Oct. 28, 2021 agreement	Jul. 01, 2021 USD ($)	Jul. 01, 2020 USD ($)	May 15, 2020 USD ($)	May 05, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jul. 01, 2019 USD ($)	Mar. 15, 2019 agreement
Change in regulatory asset
Deferred fuel and purchased power costs — current period																																$ 291,992,000	$ 256,871,000	$ 93,651,000
Amounts charged to customers																																(219,579,000)	(44,557,000)	12,047,000
Number of customers | customer																		3,800					13,000
Inconvenience payment																		$ 25					$ 25
Arizona Public Service Company
Change in regulatory asset
Deferred fuel and purchased power costs — current period																																291,992,000	256,871,000	93,651,000
Amounts charged to customers																																$ (219,579,000)	(44,557,000)	$ 12,047,000
Demand side management funds																																														$ 36,000,000
Customer credits																																	43,000,000
Customer credits, additional funds																																	7,000,000
Percentage increase under PSA effective for first billing cycle beginning April 2021																															50.00%
Remaining percentage increase under PSA effective for first billing cycle beginning November 2021																															50.00%
Arizona Public Service Company | 2017 Settlement Agreement and its Customer Education and Outreach Plan
Change in regulatory asset
Settlement amount															$ 24,750,000
Settlement amount returned to customers															$ 24,000,000
Arizona Public Service Company | Damage from Fire, Explosion or Other Hazard
Change in regulatory asset
Past due balance threshold qualifying for payment extension																																							$ 75
ACC | Arizona Public Service Company
Settlement Agreement
Program term																																		18 years
Change in regulatory asset
Public utilities, requested rate increase (decrease), income tax amount																								$ (184,000,000)				$ 86,500,000
Requested rate increase (decrease), deferred taxes amortization, period																											28 years 6 months
Public utilities, requested rate increase (decrease), amount, one-time bill credit																									$ 64,000,000
Public utilities, requested rate increase (decrease), amount, one-time bill credit, additional benefit																									$ 39,500,000
Number of public utility programs | program																																		2
Solar power capacity | MW																																		80
Arizona Renewable Energy Standard and Tariff | ACC | Arizona Public Service Company
Settlement Agreement
Plan term																																5 years
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company
Settlement Agreement
Amount of proposed budget																																						$ 86,200,000			$ 100,500,000		$ 93,100,000	$ 84,700,000				$ 86,300,000
Revenue requirements																																												$ 4,500,000
Authorized amount to be collected												$ 68,300,000
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company | Minimum
Change in regulatory asset
Authorized spending in capital costs					$ 20,000,000
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company | Maximum
Change in regulatory asset
Authorized spending in capital costs					$ 30,000,000
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company | Solar Communities
Settlement Agreement
Program term																													3 years
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company | Solar Communities | Minimum
Settlement Agreement
Required annual capital investment																													$ 10,000,000
Arizona Renewable Energy Standard and Tariff 2018 | ACC | Arizona Public Service Company | Solar Communities | Maximum
Settlement Agreement
Required annual capital investment																													$ 15,000,000
Power Supply Adjustor (PSA) | ACC | Arizona Public Service Company
Change in regulatory asset
Beginning balance																																$ 388,148,000	175,835,000
Deferred fuel and purchased power costs — current period																																291,992,000	256,871,000
Amounts charged to customers																																(219,579,000)	(44,558,000)
Ending balance																																$ 460,561,000	$ 388,148,000	$ 175,835,000
PSA rate (in dollars per kWh) | $ / kWh									0.007544	0.003544				0.001544			0.003544					(0.000456)
Forward component Of PSA rate1 (in dollars per kWh) | $ / kWh									(0.004842)	(0.004444)				(0.004444)			0.003434					(0.002086)
Historical component Of PSA rate1 (in dollars per kWh)									0.012386	0.007988				0.005988			0.000110					0.001630
Fuel and purchased power costs above annual cap			$ 456,000,000														$ 215,900,000
Power Supply Adjustor (PSA) | ACC | Arizona Public Service Company | Subsequent Event
Change in regulatory asset
PSA rate (in dollars per kWh)	0.019074	0.006
Period to reduce balancing account	24 months
Reporting threshold of balancing account	$ 500,000
Power Supply Adjustor (PSA) | ACC | Arizona Public Service Company | Cost Recovery Mechanisms
Change in regulatory asset
Maximum increase decrease in PSA rate (in dollars per kWh) | $ / kWh																						0.004
PSA rate In prior years1 (in dollars per kWh) | $ / kWh									(0.004)								(0.004)					0.002115
Number of agreements | agreement																																										3							2
Retail Rate Case Filing with Arizona Corporation Commission | Arizona Public Service Company | Maximum
Change in regulatory asset
Fixed costs recoverable per power lost (in dollars per kWh) | $ / KWH_Kilowatt_hour																								2.68
Retail Rate Case Filing with Arizona Corporation Commission | ACC | Arizona Public Service Company
Change in regulatory asset
Commercial customers, market pricing, threshold | MW				140			280																	200
Demand Side Management Adjustor Charge 2020 | ACC | Arizona Public Service Company
Settlement Agreement
Amount of proposed budget																																													$ 51,900,000		$ 51,900,000
Demand Side Management Adjustor Charge 2021 | ACC | Arizona Public Service Company
Settlement Agreement
Amount of proposed budget																																		$ 63,700,000
Demand Side Management Adjustor Charge 2022 | ACC | Arizona Public Service Company
Settlement Agreement
Amount of proposed budget																																								$ 78,400,000
Change in regulatory asset
Rate matter, increase (decrease) in proposed budget																																								$ 14,000,000
Demand Side Management Adjustor Charge 2023 | ACC | Arizona Public Service Company
Settlement Agreement
Amount of proposed budget																																					$ 88,000,000
Environmental Improvement Surcharge | FERC | Arizona Public Service Company
Change in regulatory asset
Rate matters, environmental surcharge cap rate1 (in dollars per kWh) | $ / KWH_Kilowatt_hour									0.0005
Environmental Improvement Surcharge | FERC | Arizona Public Service Company | Subsequent Event
Change in regulatory asset
Rate matters, increase (decrease) In cost recovery		$ 14,700,000
Rate matters, increase (decrease) In cost recovery, excess Of annual amount		$ 3,300,000
Environmental Improvement Surcharge | FERC | Arizona Public Service Company | Minimum
Change in regulatory asset
Rate matters, environmental surcharge cap rate1, amount									$ 13,000,000
Environmental Improvement Surcharge | FERC | Arizona Public Service Company | Maximum
Change in regulatory asset
Rate matters, environmental surcharge cap rate1, amount									$ 15,000,000
Transmission rates, transmission cost adjustor and other transmission matters | FERC | Arizona Public Service Company
Change in regulatory asset
Rate matters, increase (decrease) In cost recovery						$ 33,000,000							$ 4,000,000						$ (6,100,000)
Rate matters, increase (decrease) in cost recovery, wholesale customer rates						6,400,000							3,200,000						(4,800,000)
Rate matters, increase (decrease) in cost recovery, retail customer rates						26,600,000							7,200,000						(10,900,000)
Rate matters, increase (decrease) In retail revenue requirements						$ 2,400,000							$ 28,400,000						$ 7,400,000
Lost Fixed Cost Recovery Mechanism | Arizona Public Service Company
Change in regulatory asset
Fixed costs recoverable per power lost (in dollars per kWh)																																			0.025	2.56
Rate matter cap percentage of retail revenue																																1.00%
Amount of adjustment approved representing prorated sales losses pending approval								$ 59,100,000								$ 38,500,000					$ 26,600,000
Increase (decrease) In amount Of adjustment representing prorated sales losses								$ 32,500,000								$ 11,800,000					$ (9,600,000)
Net Metering | ACC | Arizona Public Service Company
Change in regulatory asset
Rate matters, cost of service, resource comparison proxy method, maximum annual percentage decrease					10.00%																									10.00%
Rate matters, cost of service for interconnected dg system customers, grandfathered period																														20 years
Rate matters, cost of service for new customers, guaranteed export price period																														10 years
Rate matter, request second-year energy price for exported energy1 (in dollars per kwh) | $ / kWh					0.0846						0.094									0.094						0.105