WILDFIRE-RELATED CONTINGENCIES (Wildfire-Related Claims Narrative) (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Loss Contingencies [Line Items]
Reimbursements	$ (25,000,000)	$ (197,000,000)
Loss from Wildfires
Loss Contingencies [Line Items]
Reimbursements	0	(7,000,000)
2018 Camp fire
Loss Contingencies [Line Items]
Reimbursements	0
2017 Northern California wildfires
Loss Contingencies [Line Items]
Reimbursements	0
Pacific Gas & Electric Co
Loss Contingencies [Line Items]
Reimbursements	(25,000,000)	$ (197,000,000)
Pacific Gas & Electric Co \| 2018 Camp fire
Loss Contingencies [Line Items]
Legal and other costs	13,000,000
Pacific Gas & Electric Co \| 2017 Northern California wildfires
Loss Contingencies [Line Items]
Legal and other costs	$ 34,000,000

The increase (decrease) during the reporting period in insurance settlements receivable, which are amounts due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. The expectation is that such reimbursement will be received within one year of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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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.

+ References

No definition available.

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