Schedule I - Condensed Financial Information of Registrant - Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CONDENSED FINANCIAL STATEMENTS
Operating expenses	$ 4,112,852	$ 3,871,351	$ 3,592,474
Other
Total	101,968	102,376	99,281
Interest expense	425,742	374,887	283,569
Income tax benefit	110,529	76,912	74,827
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	608,806	501,557	483,602
Other comprehensive income (loss) — attributable to common shareholders	2,202	(1,709)	23,426
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	611,008	499,848	507,028
Pinnacle West
CONDENSED FINANCIAL STATEMENTS
Operating expenses	9,931	11,249	8,850
Other
Equity in earnings of subsidiaries	643,703	539,962	500,042
Other income (expense)	23,835	2,823	(4,725)
Total	667,538	542,785	495,317
Interest expense	65,261	47,251	18,861
Income before income taxes	592,346	484,285	467,606
Income tax benefit	(16,460)	(17,272)	(15,996)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	608,806	501,557	483,602
Other comprehensive income (loss) — attributable to common shareholders	2,202	(1,709)	23,426
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 611,008	$ 499,848	$ 507,028