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OTHER CONTINGENCIES AND COMMITMENTS (Environmental Remediation Contingencies Liability) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Site Contingency [Line Items]
Former manufactured gas plant sites owned by the Utility or third parties	$ 686	$ 659
Utility-owned generation facilities (other than fossil fuel-fired), other facilities, and third-party disposal sites	112	111
Fossil fuel-fired generation facilities and sites	74	96
Environmental Remediation Liability	1,300	1,301
Topock, Arizona
Site Contingency [Line Items]
Natural gas compressor station	299	303
Hinkley, California
Site Contingency [Line Items]
Natural gas compressor station	$ 129	$ 132

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- Definition

Utility records an environmental remediation liability when site assessments indicate that remediation is probable and the Utility can reasonably estimate the loss or a range of probable amounts. The Utility records an environmental remediation liability based on the lower end of the range of estimated probable costs, unless an amount within the range is a better estimate than any other amount

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No definition available.

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- Definition

Former Mgp Sites Owned By Utility Or Third Parties

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No definition available.

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- Definition

Fossil Fuel-Fired Generation Facilities Formerly Owned By Utility

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No definition available.

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- Definition

Natural Gas Compressor Station

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No definition available.

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- Definition

Utility-Owned Generation Facilities (Other Than For Fossil Fuel-Fired), Other Facilities, And Third-Party Disposal Sites

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No definition available.

+ Details

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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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No definition available.

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- Details

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- Details

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