Public Utilities, Disallowance Of Annual Amortization, Percentage

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- Definition

Recommended rate adjustment, annualized customer impact, cost deferrals

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- Definition

Recommended rate adjustment, annualized customer impact, disallowance of investments

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- Definition

Regulatory Asset, Net Book Value

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- Definition

Regulatory Matters, Amount Not Recoverable

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- Definition

Settlement agreement, ACC approved rate adjustment, annualized customer impact

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Regulatory Matters - Four Corners, Cholla and Navajo Plant (Details) - APS - USD ($) $ in Millions		1 Months Ended		3 Months Ended
	Nov. 02, 2021	Sep. 30, 2018	Apr. 30, 2018	Mar. 31, 2022	Aug. 02, 2021
Navajo Nation, Economic Development Organization \| Coal Community Transition Plan \| Retail Rate Case Filing with Arizona Corporation Commission \| ACC
Business Acquisition [Line Items]
Disallowance of annual amortization percentage					15.00%
SCE \| Four Corners Units 4 and 5
Business Acquisition [Line Items]
Settlement agreement, ACC approved rate adjustment, annualized customer impact		$ 58.5	$ 67.5
Disallowance of plant investments	$ 194.0
Cost deferrals	$ 215.5
Amount not recoverable				$ 154.4
Retired power plant costs
Business Acquisition [Line Items]
Net book value				40.6
Navajo Plant
Business Acquisition [Line Items]
Net book value				59.8
Navajo Plant, Coal Reclamation Regulatory Asset
Business Acquisition [Line Items]
Net book value				$ 16.1