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INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARIZED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 15, 2017 | Sep. 26, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 13, 2018 | Nov. 14, 2017 | Sep. 25, 2016 | May 31, 2016 | May 09, 2016 | Mar. 31, 2016 | Mar. 29, 2016
Oncor Holdings Electric Delivery Company LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  | $ 3,347 |  |  |  |  |  |  |  |  |
Operating expense |  |  | (2,434) |  |  |  |  |  |  |  |  |
Income from operations |  |  | 913 |  |  |  |  |  |  |  |  |
Interest expense |  |  | (285) |  |  |  |  |  |  |  |  |
Income tax expense |  |  | (119) |  |  |  |  |  |  |  |  |
Net income/earnings |  |  | 455 |  |  |  |  |  |  |  |  |
Noncontrolling interest held by TTI |  |  | (94) |  |  |  |  |  |  |  |  |
Earnings attributable to Sempra Energy |  |  | 360 |  |  |  |  |  |  |  |  |
Current assets |  |  | 772 |  |  |  |  |  |  |  |  |
Noncurrent assets |  |  | 21,980 |  |  |  |  |  |  |  |  |
Current liabilities |  |  | 2,217 |  |  |  |  |  |  |  |  |
Noncurrent liabilities |  |  | 11,756 |  |  |  |  |  |  |  |  |
Other Equity Method Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  | 727 | $ 846 | $ 1,079 |  |  |  |  |  |  |
Operating expense |  |  | (614) | (590) | (726) |  |  |  |  |  |  |
Income from operations |  |  | 113 | 256 | 353 |  |  |  |  |  |  |
Interest expense |  |  | (330) | (217) | (127) |  |  |  |  |  |  |
Net income/earnings |  |  | (33) | 116 | $ 252 |  |  |  |  |  |  |
Current assets |  |  | 625 | 974 |  |  |  |  |  |  |  |
Noncurrent assets |  |  | 14,803 | 14,087 |  |  |  |  |  |  |  |
Current liabilities |  |  | 813 | 797 |  |  |  |  |  |  |  |
Noncurrent liabilities |  |  | $ 10,226 | $ 9,809 |  |  |  |  |  |  |  |
Sempra LNG & Midstream [Member] | Rockies Express [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investee |  |  |  |  |  |  |  |  | 25.00% | 25.00% | 25.00% | 25.00%
Sempra Renewables [Member] | Broken Bow 2 Wind [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investee |  |  |  |  |  | 50.00% |  |  |  |  |  |
IEnova [Member] | Ductos Energéticos del Norte [Member] | Sempra Mexico [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investee |  |  |  |  |  |  | 50.00% |  |  |  |  |
Ownership percentage before acquisition |  |  |  |  |  |  | 50.00% |  |  |  |  |
Acquired percentage interest | 50.00% |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in consolidated entity | 100.00% |  |  |  |  |  |  |  |  |  |  |
IEnova [Member] | IEnova Pipelines [Member] | Sempra Mexico [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage before acquisition |  |  |  |  |  |  |  | 50.00% |  |  |  |
Acquired percentage interest |  | 50.00% |  |  |  |  |  |  |  |  |  |
Ownership percentage in consolidated entity |  | 100.00% |  |  |  |  |  |  |  |  |  |

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