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

Recommended Rate Adjustment, Annualized Customer Impact, Estimated Writeoff Of Cost Deferrals

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- Definition

Recommended Rate Adjustment, Property, Plant And Equipment, SCR Plant Investments, Net Of Deferred Taxes

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- Definition

Regulatory Asset, Net Book Value

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- Definition

Settlement agreement, ACC approved rate adjustment, annualized customer impact

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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
	Nov. 02, 2021	Oct. 27, 2021	Sep. 30, 2021	Aug. 02, 2021	Sep. 30, 2018	Apr. 30, 2018
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				$ 399.0
Cost deferrals				$ 61.0
Estimated write-off of cost deferrals			$ 77.0
SCR plant investments			331.0
SCE \| Four Corners Units 4 and 5 \| Subsequent Event
Business Acquisition [Line Items]
Disallowance of plant investments		$ 194.0
Cost deferrals	$ 215.5	$ 215.5
Retired power plant costs
Business Acquisition [Line Items]
Net book value			44.8
Navajo Plant
Business Acquisition [Line Items]
Net book value			64.6
Navajo Plant, Coal Reclamation Regulatory Asset
Business Acquisition [Line Items]
Net book value			$ 17.3