Regulatory Matters - Schedule of Changes in The Deferred Fuel and Purchased Power Regulatory Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in regulatory asset
Deferred fuel and purchased power costs	$ 250,288	$ 549,877	$ 291,992
Amounts charged to customers	(425,886)	(547,243)	(219,579)
Arizona Public Service Company
Change in regulatory asset
Deferred fuel and purchased power costs	250,288	549,877	291,992
Amounts charged to customers	(425,886)	(547,243)	(219,579)
Power Supply Adjustor (PSA) | ACC | Arizona Public Service Company
Change in regulatory asset
Balance at beginning of period	463,195	460,561
Deferred fuel and purchased power costs	250,288	549,877
Amounts charged to customers	(425,886)	(547,243)
Balance at end of period	$ 287,597	$ 463,195	$ 460,561