Regulatory Matters - Capital Structure and Costs of Capital (Details) - APS	Oct. 28, 2022
Cost of Capital
Public Utilities, Requested Long-Term Debt Cost Of Capital, Percentage	3.85%
Common stock equity	10.25%
Weighted-average cost of capital	7.17%
Retail Rate Case Filing with Arizona Corporation Commission
Capital Structure
Common stock equity	51.93%
Retail Rate Case Filing with Arizona Corporation Commission \| ACC
Capital Structure
Long-term debt	48.07%

Capital Structure [Abstract]

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Cost Of Capital [Abstract]

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Public Utilities, Requested Equity Cost Of Capital, Percentage

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Public Utilities, Requested Long-Term Debt Cost Of Capital, Percentage

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Public Utilities, Requested Weighted Average Cost Of Capital, Percentage

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Percentage of public utility's requested debt to capital, including debt and equity.

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Percentage of public utility's requested equity to capital, including debt and equity.

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