Schedule I - Condensed Financial Information of Registrant - Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CONDENSED FINANCIAL STATEMENTS
Operating expenses	$ 3,592,474	$ 2,998,525	$ 2,798,830
Other
Total	99,281	173,982	89,044
Interest expense	283,569	254,314	247,501
Income tax benefit	74,827	110,086	78,173
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	483,602	618,720	550,559
Other comprehensive income (loss) — attributable to common shareholders	23,426	7,935	(5,700)
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	507,028	626,655	544,859
Pinnacle West
CONDENSED FINANCIAL STATEMENTS
Operating expenses	8,850	10,245	7,901
Other
Equity in earnings of subsidiaries	500,042	628,916	566,147
Other expense	(4,725)	(4,919)	(4,586)
Total	495,317	623,997	561,561
Interest expense	18,861	10,672	14,021
Income before income taxes	467,606	603,080	539,639
Income tax benefit	(15,996)	(15,640)	(10,920)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	483,602	618,720	550,559
Other comprehensive income (loss) — attributable to common shareholders	23,426	7,935	(5,700)
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 507,028	$ 626,655	$ 544,859