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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - EFFECTS OF REGULATION (Details)	12 Months Ended
	Dec. 31, 2018 utility
Sempra South American Utilities [Member]
Schedule of Equity Method Investments [Line Items]
Number of electric distribution utilities	2
Oncor Electric Delivery Company LLC [Member] | Sempra Texas Utility [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	80.25%

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Number Of Electric Distribution Utilities

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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