v3.8.0.1

INVESTMENTS IN UNCONSOLIDATED ENTITIES - Narrative (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 23, 2018 | Mar. 09, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017 | [1]
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 2,406 | $ 2,406 |  |  | $ 2,397
Equity earnings |  |  |  | 15 |  |  |  |
Equitization of note receivable due from unconsolidated affiliate |  |  |  |  | 0 | $ 19 | [2] |
Maximum exposure under guarantor obligations |  |  |  | 4,500 | 4,500 |  |  |
Aggregate carrying value of guarantor obligations |  |  |  | 31 | 31 |  |  |
Joint Venture [Member] | Sempra South American Utilities [Member] | Eletrans [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equitization of note receivable due from unconsolidated affiliate |  |  |  |  |  | 19 |  |
Joint Venture [Member] | Sempra Mexico [Member] | IMG [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investments made during period |  |  |  |  | 25 | 46 |  |
Joint Venture [Member] | Sempra LNG & Midstream [Member] | Cameron LNG [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investments made during period |  |  |  |  | 29 | 1 |  |
Capitalized interest |  |  |  |  | $ 11 | $ 11 |  |
Oncor Holdings [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity earnings |  |  |  | 19 |  |  |  |
Oncor Electric Delivery Company LLC. [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Acquired percentage interest |  | 80.25% |  |  |  |  |  |
Subsequent Event [Member] | Joint Venture [Member] | Sempra LNG & Midstream [Member] | Cameron LNG [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investments made during period |  |  | $ 32 |  |  |  |  |
Sempra Texas Holdings Corp [Member] | Oncor Holdings [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Consideration |  | $ 9,161 |  |  |  |  |  |
Goodwill |  | $ 2,672 |  |  |  |  |  |
Sempra Texas Holdings Corp [Member] | Oncor Holdings [Member] | Sempra Texas Intermediate Holding Company LLC [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Ownership percentage in consolidated entity |  | 100.00% |  |  |  |  |  |
Sempra Texas Holdings Corp [Member] | Oncor Electric Delivery Company LLC. [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Acquired percentage interest |  | 80.03% |  |  |  |  |  |
Sempra Texas Holdings Corp [Member] | Oncor Electric Delivery Company LLC. [Member] | Oncor Holdings [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Ownership percentage in consolidated entity |  | 80.25% |  |  |  |  |  |
Oncor Electric Delivery Company LLC. [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity earnings |  |  |  | $ 15 |  |  |  |
Oncor Electric Delivery Company LLC. [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Investments made during period | $ 117 |  |  |  |  |  |  |
[1] | Derived from audited financial statements.
[2] | As adjusted for the retrospective adoption of ASU 2016-18, which we discuss in Note 2.

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