Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal	$ 21,272	$ 35,617	$ (5,041)
State	2,854	1,950	2,458
Total current	24,126	37,567	(2,583)
Deferred:
Federal	37,273	23,693	95,327
State	15,513	13,567	17,342
Total deferred	52,786	37,260	112,669
Income tax expense/(benefit)	76,912	74,827	110,086
Arizona Public Service Company
Current:
Federal	26,405	103,349	1,514
State	1,027	161	(11)
Total current	27,432	103,510	1,503
Deferred:
Federal	44,922	(31,860)	101,175
State	21,830	19,150	22,875
Total deferred	66,752	(12,710)	124,050
Income tax expense/(benefit)	$ 94,184	$ 90,800	$ 125,553