Asset Retirement Obligations - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Asset Retirement Obligations [Line Items]
Asset retirement obligation	$ 1,270,299	$ 1,146,586	$ 966,001
Cholla | APS
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	49,000	63,000
Four Corners Coal-Fired Power Plant | APS
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	16,000	82,000
Navajo Coal-Fired Power Plant | APS
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation	(4,000)	8,000
Ironwood Solar Power Plant | APS
Schedule of Asset Retirement Obligations [Line Items]
Asset retirement obligation	$ 15,000
Palo Verde Nuclear Plant | APS
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation		1,000
Solar | APS
Schedule of Asset Retirement Obligations [Line Items]
Increase (decrease) in asset retirement obligation		$ (11,000)