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Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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- Definition The portion of the difference between total income tax expense or benefit as reported in the income statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to allowance for equity funds used during construction. + References No definition available. + Details
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