Asset Retirement Obligations - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule of Asset Retirement Obligations [Line Items]
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation	$ 17,980,157	$ 16,854,354
Arizona Public Service Company
Schedule of Asset Retirement Obligations [Line Items]
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation	17,979,860	$ 16,800,254
Cholla | Arizona Public Service Company
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	71,000
Four Corners Coal-Fired Power Plant | Arizona Public Service Company
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	(7,000)
Navajo Coal-Fired Power Plant | Arizona Public Service Company
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	8,000
Palo Verde | Arizona Public Service Company
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	63,000
Palo Verde sale leaseback property, plant and equipment, net of accumulated depreciation	59,000
Decrease in regulatory liability	$ 4,000