Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ (5,041)	$ 11,869	$ (13,551)
State	2,458	1,932	3,195
Total current	(2,583)	13,801	(10,356)
Deferred:
Federal	95,327	53,398	(14,982)
State	17,342	10,974	9,565
Total deferred	112,669	64,372	(5,417)
Income tax expense/(benefit)	110,086	78,173	(15,773)
Arizona Public Service Company
Current:
Federal	1,514	57,299	(54,697)
State	(11)	99	695
Total current	1,503	57,398	(54,002)
Deferred:
Federal	101,175	15,122	29,321
State	22,875	16,244	15,109
Total deferred	124,050	31,366	44,430
Income tax expense/(benefit)	$ 125,553	$ 88,764	$ (9,572)