v3.8.0.1

ACQUISTION AND DIVESTITURE ACTIVITY - ASSETS HELD FOR SALE (Details) - Sempra Mexico [Member] - TdM [Member] $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 29, 2016 MW | Mar. 31, 2017 USD ($) | Mar. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Generating capacity (in mw) | MW | 625 |  |
Deferred tax expense |  | $ 5 |
Disposal Group Held-for-sale [Member] |  |  |
Assets Held for Sale, Assets [Abstract] |  |  |
Inventories |  |  | $ 10
Other current assets |  |  | 64
Property, plant and equipment, net |  |  | 55
Other noncurrent assets |  |  | 6
Total assets held for sale |  |  | 135
Assets Held for Sale, Liabilities [Abstract] |  |  |
Accounts payable |  |  | 2
Current liabilities |  |  | 38
Asset retirement obligations |  |  | 5
Other noncurrent liabilities |  |  | 7
Total liabilities held for sale |  |  | $ 52

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