ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - DISCONTINUED OPERATIONS (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) company	Mar. 31, 2019 USD ($)	Apr. 24, 2020 USD ($)	Dec. 31, 2019 USD ($)		Oct. 12, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income tax	$ 80	$ (42)
Earnings attributable to noncontrolling interests	(8)	(9)
Earnings (losses) from discontinued operations attributable to common shares	72	(51)
Cash and cash equivalents	181			$ 75
Current assets	566			445	[1]
Noncurrent assets	3,364			3,513	[1]
Current liabilities	538			444	[1]
Noncurrent liabilities	1,006			1,052	[1]
Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	400	421
Cost of sales	(253)	(265)
Operating expenses	(46)	(45)
Interest and other	0	(3)
Income before income taxes and equity earnings	101	108
Income tax expense	(21)	(151)
Equity earnings	0	1
Income (loss) from discontinued operations, net of income tax	80	(42)
Earnings (losses) from discontinued operations attributable to common shares	72	$ (51)
Cash and cash equivalents	180			74
Restricted cash	1			1
Accounts receivable, net	316			303
Due from unconsolidated affiliates	2			2
Inventories	36			36
Other current assets	31			29
Current assets	566			445
Due from unconsolidated affiliates	60			54
Goodwill and other intangible assets	748			801
Property, plant and equipment, net	2,517			2,618
Other noncurrent assets	39			40
Noncurrent assets	3,364			3,513
Short-term debt	158			52
Accounts payable	192			201
Current portion of long-term debt and finance leases	82			85
Other current liabilities	106			106
Current liabilities	538			444
Long-term debt and finance leases	663			702
Deferred income taxes	282			284
Other noncurrent liabilities	61			66
Noncurrent liabilities	1,006			1,052
Cumulative foreign translation adjustments	$ 693			$ 551
Luz Del Sur [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)	83.60%
Disposal Group, Including Discontinued Operations, Number of Energy Service Companies Disposed Of | company	2
Chilquinta Energia [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)	100.00%					100.00%
Consideration to be received						$ 2,230
Eletrans [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)						50.00%
Eletrans [Member] | Chilquinta Energia [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)						50.00%
Eletrans [Member] | State Grid International Development Limited [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)						100.00%
Subsequent Event [Member] | Discontinued Operations, Held-for-sale [Member] | Luz Del Sur [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration to be received			$ 3,590
Subsequent Event [Member] | Luz Del Sur [Member] | Discontinued Operations, Held-for-sale [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest (as a percent)			83.60%

[1] Derived from audited financial statements.