Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Reconciliation Increases Reductions in Tax Expense [Abstract]
Federal income tax expense at statutory rate	$ 120,887	$ 156,666	$ 136,127
State income tax net of federal income tax benefit	17,740	22,656	19,146
State income tax credits net of federal income tax benefit	(5,482)	(7,015)	(8,951)
Net operating loss carryback tax benefit	0	(5,915)	0
Excess deferred income taxes — Tax Cuts and Jobs Act	(36,241)	(36,558)	(50,543)
Allowance for equity funds used during construction (see Note 1)	(4,629)	(4,180)	(2,747)
Palo Verde VIE noncontrolling interest (see Note 17)	(3,617)	(3,617)	(4,094)
Investment tax credit amortization	(5,608)	(7,620)	(7,510)
Other federal income tax credits	(10,867)	(6,976)	(4,616)
Other	2,644	2,645	1,361
Income tax expense/(benefit)	74,827	110,086	78,173
Arizona Public Service Company
Income Tax Reconciliation Increases Reductions in Tax Expense [Abstract]
Federal income tax expense at statutory rate	132,920	162,762	142,020
State income tax net of federal income tax benefit	19,000	23,339	20,124
State income tax credits net of federal income tax benefit	(3,744)	(5,277)	(7,213)
Net operating loss carryback tax benefit	0	0	0
Excess deferred income taxes — Tax Cuts and Jobs Act	(36,241)	(36,558)	(50,543)
Allowance for equity funds used during construction (see Note 1)	(4,629)	(4,180)	(2,747)
Palo Verde VIE noncontrolling interest (see Note 17)	(3,617)	(3,617)	(4,094)
Investment tax credit amortization	(5,608)	(7,620)	(7,510)
Other federal income tax credits	(7,721)	(3,912)	(3,035)
Other	440	616	1,762
Income tax expense/(benefit)	$ 90,800	$ 125,553	$ 88,764