ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - DISCONTINUED OPERATIONS (Details) $ in Millions			3 Months Ended		9 Months Ended
	Jun. 24, 2020 USD ($)	Apr. 24, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) company	Sep. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of income tax			$ (7)	$ 256	$ 1,850	$ 292
Earnings attributable to noncontrolling interests			0	(8)	(10)	(25)
(Loss) Income from Discontinued Operations, Net of Income Tax			(7)	248	1,840	267
Cash and cash equivalents			0		0			$ 75
Current assets			0		0			445	[1]
Noncurrent assets			0		0			3,513	[1]
Current liabilities			0		0			444	[1]
Noncurrent liabilities			0		0			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]
Consideration to be received	$ 2,216
Pretax gain on sale	628
Revenues			0	398	570	1,222
Cost of sales			0	(249)	(364)	(765)
(Loss) gain on sale of discontinued operations	$ 248		(16)	0	2,899	0
Operating expenses			0	(38)	(66)	(123)
Interest and other			0	(3)	(3)	(12)
Income before income taxes and equity earnings			(16)	108	3,036	322
Income tax benefit (expense)			9	148	(1,186)	(32)
Equity earnings			0	0	0	2
(Loss) income from discontinued operations, net of income tax			(7)	256	1,850	292
(Loss) Income from Discontinued Operations, Net of Income Tax			(7)	$ 248	1,840	$ 267
Cash and cash equivalents			$ 4,600		$ 4,600			74
Restricted cash								1
Accounts receivable, net								303
Due from unconsolidated affiliates								2
Inventories								36
Other current assets								29
Current assets								445
Due from unconsolidated affiliates								54
Goodwill and other intangible assets								801
Property, plant and equipment, net								2,618
Other noncurrent assets								40
Noncurrent assets								3,513
Short-term debt								52
Accounts payable								201
Current portion of long-term debt and finance leases								85
Other current liabilities								106
Current liabilities								444
Long-term debt and finance leases								702
Deferred income taxes								284
Other noncurrent liabilities								66
Noncurrent liabilities								$ 1,052
Cumulative foreign translation adjustments							$ 645
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		$ 3,549
Pretax gain on sale		2,271
(Loss) gain on sale of discontinued operations		$ 1,499
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%	83.60%		83.60%
Number of energy services companies | 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%		100.00%
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%

[1] Derived from audited financial statements.