ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - ASSETS HELD FOR SALE (Details) - USD ($) $ in Millions	Apr. 22, 2019	Mar. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures		$ 12,038	$ 11,972
Assets Held for Sale, Assets [Abstract]
Cash and cash equivalents		67	88
Sempra Renewables [Member] | Disposal Group Held-for-sale [Member] | Wind Facilities [Member]
Assets Held for Sale, Assets [Abstract]
Cash and cash equivalents		4
Accounts receivable – trade, net		2
Other current assets		2
Property, plant and equipment, net		366
Total assets held for sale		374
Assets Held for Sale, Liabilities [Abstract]
Accounts payable – trade		1
Asset retirement obligations		6
Total liabilities held for sale		7
Operating Segments [Member] | Sempra LNG [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures		1,255	$ 1,271
Operating Segments [Member] | Sempra Renewables [Member] | Wind and Solar Investments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures		$ 290
Subsequent Event [Member] | Sempra Renewables [Member] | Disposal Group Held-for-sale [Member] | Wind Facilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received	$ 584