ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - DISCONTINUED OPERATIONS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Oct. 12, 2019	Sep. 27, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of income tax	$ 256	$ 54	$ 292	$ 137
Earnings attributable to noncontrolling interests	(8)	(8)	(25)	(22)
Earnings from discontinued operations attributable to common shares	248	46	267	115
Cash and cash equivalents	360		360				$ 88
Noncurrent assets	3,395		3,395				3,259	[1]
Current liabilities	804		804				368	[1]
Noncurrent liabilities	1,023		1,023				1,013	[1]
Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	720		720				459	[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	398	375	1,222	1,190
Cost of sales	(249)	(246)	(765)	(794)
Operating expenses	(38)	(41)	(123)	(151)
Interest and other	(3)	(6)	(12)	(15)
Income before income taxes and equity earnings	108	82	322	230
Income tax benefit (expense)	148	(28)	(32)	(94)
Equity earnings	0	0	2	1
Income from discontinued operations, net of income tax	256	54	292	137
Earnings from discontinued operations attributable to common shares	248	$ 46	267	$ 115
Cash and cash equivalents	359		359				88
Restricted cash	1		1				0
Accounts receivable, net	290		290				315
Due from unconsolidated affiliates	2		2				2
Inventories	44		44				38
Other current assets	24		24				16
Current assets	720		720				459
Due from unconsolidated affiliates	51		51				44
Goodwill and other intangible assets	803		803				819
Property, plant and equipment, net	2,502		2,502				2,357
Other noncurrent assets	39		39				39
Noncurrent assets	3,395		3,395				3,259
Short-term debt	75		75				55
Accounts payable	165		165				176
Dividends payable	428		428				8
Current portion of long-term debt and finance leases	39		39				29
Other current liabilities	97		97				100
Current liabilities	804		804				368
Long-term debt and finance leases	687		687				708
Deferred income taxes	274		274				250
Other noncurrent liabilities	62		62				55
Noncurrent liabilities	1,023		1,023				1,013
Cumulative foreign translation adjustments	$ 549		$ 549				$ 506
Discontinued Operations, Held-for-sale [Member] | Chilquinta Energia [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest	100.00%		100.00%
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]
Ownership interest	83.60%		83.60%			83.60%
Consideration to be received						$ 3,590
Subsequent Event [Member] | Discontinued Operations, Held-for-sale [Member] | Chilquinta Energia [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest					100.00%
Consideration to be received					$ 2,230
Subsequent Event [Member] | Discontinued Operations, Held-for-sale [Member] | Eletrans [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest					50.00%
Chilquinta Energia [Member] | Subsequent Event [Member] | Discontinued Operations, Held-for-sale [Member] | Eletrans [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest					50.00%
State Grid International Development Limited [Member] | Subsequent Event [Member] | Discontinued Operations, Held-for-sale [Member] | Eletrans [Member] | Sempra South American Utilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest					100.00%

[1] Derived from audited financial statements.