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ACQUISTION AND DIVESTITURE ACTIVITY - DIVESTITURES (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 13, 2018 | Sep. 12, 2016 | Sep. 30, 2016 | May 31, 2016 | Mar. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | May 09, 2016 | Mar. 29, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ (2,373) | $ (2,397) | $ (2,364) |  |
Current liabilities |  |  |  |  |  |  | 25 | 49 |  |  |
Gain (loss) on deconsolidation | $ 367 |  |  |  |  |  |  |  |  |  |
Liabilities assumed |  |  |  |  |  |  | 145 | 261 | $ 1,322 |  |
Equity method investment |  |  |  |  |  |  | $ 9,652 | $ 0 |  |  |
Disposal Group Disposed of by Sale [Member] | Certain Subsidiaries Of Sempra Renewables [Member] |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale, net of transaction costs | 1,585 |  |  |  |  |  |  |  |  |  |
Cash | (7) |  |  |  |  |  |  |  |  |  |
Restricted cash | (7) |  |  |  |  |  |  |  |  |  |
Other current assets | (14) |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | (1,303) |  |  |  |  |  |  |  |  |  |
Other investments | (329) |  |  |  |  |  |  |  |  |  |
Goodwill | 0 |  |  |  |  |  |  |  |  |  |
Other noncurrent assets | (24) |  |  |  |  |  |  |  |  |  |
Current liabilities | 8 |  |  |  |  |  |  |  |  |  |
Long-term debt | 70 |  |  |  |  |  |  |  |  |  |
Asset retirement obligations | 52 |  |  |  |  |  |  |  |  |  |
Other noncurrent liabilities | 5 |  |  |  |  |  |  |  |  |  |
Noncontrolling interests | 486 |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive income | (9) |  |  |  |  |  |  |  |  |  |
Gain on sale of equity interests | 513 |  |  |  |  |  |  |  |  |  |
Proceeds from sale | $ 1,600 |  |  |  |  |  |  |  |  |  |
Disposal Group Disposed of by Sale [Member] | Energy South [Member] |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale, net of transaction costs |  | $ 304 |  |  |  |  |  |  |  |  |
Cash |  | (2) |  |  |  |  |  |  |  |  |
Restricted cash |  | 0 |  |  |  |  |  |  |  |  |
Other current assets |  | (17) |  |  |  |  |  |  |  |  |
Property, plant and equipment, net |  | (199) |  |  |  |  |  |  |  |  |
Other investments |  | 0 |  |  |  |  |  |  |  |  |
Goodwill |  | (72) |  |  |  |  |  |  |  |  |
Other noncurrent assets |  | (65) |  |  |  |  |  |  |  |  |
Current liabilities |  | 25 |  |  |  |  |  |  |  |  |
Long-term debt |  | 67 |  |  |  |  |  |  |  |  |
Asset retirement obligations |  | 0 |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  | 89 |  |  |  |  |  |  |  |  |
Noncontrolling interests |  | 0 |  |  |  |  |  |  |  |  |
Accumulated other comprehensive income |  | 0 |  |  |  |  |  |  |  |  |
Gain on sale of equity interests |  | 130 |  |  |  |  |  |  |  |  |
Sempra LNG & Midstream [Member] | Disposal Group Disposed of by Sale [Member] | Energy South [Member] |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash |  | (2) |  |  |  |  |  |  |  |  |
Gain on sale of equity interests |  |  | $ 130 |  |  |  |  |  |  |  |
Proceeds from sale |  | $ 318 |  |  |  |  |  |  |  |  |
Liabilities assumed |  |  | 67 |  |  |  |  |  |  |  |
Gain on sale of assets, after tax |  |  | $ 78 |  |  |  |  |  |  |  |
Sempra LNG & Midstream [Member] | Rockies Express [Member] |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investee |  |  |  | 25.00% | 25.00% |  |  |  |  | 25.00% | 25.00%
Proceeds from sale of investments |  |  |  | $ 443 | $ 440 |  |  |  |  |  |
Equity method investment |  |  |  |  | 484 |  |  |  |  |  |
Fair value of investment |  |  |  |  | 440 |  |  |  |  |  |
Other than temporary impairment in investment |  |  |  |  | 44 | $ 44 |  |  |  |  |
Other than temporary impairment in investment, net of tax |  |  |  |  | $ 27 | $ 27 |  |  |  |  |

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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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