ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - DISCONTINUED OPERATIONS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	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	$ 78	$ 55	$ 36	$ 83
Earnings from discontinued operations attributable to common shares	70	48	19	69
Cash and cash equivalents	55		55		$ 88
Noncurrent assets	3,453		3,453		3,259	[1]
Current liabilities	336		336		368	[1]
Noncurrent liabilities	1,090		1,090		1,013	[1]
Disposal Group Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets	445		445		459	[1]
Disposal Group 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	403	389	824	815
Cost of sales	(251)	(255)	(516)	(548)
Operating expenses	(40)	(56)	(85)	(110)
Interest and other	(6)	(4)	(9)	(9)
Income before income taxes and equity earnings	106	74	214	148
Income tax expense	(29)	(19)	(180)	(66)
Equity earnings	1	0	2	1
Income from discontinued operations, net of income tax	78	55	36	83
Earnings attributable to noncontrolling interests	(8)	(7)	(17)	(14)
Earnings from discontinued operations attributable to common shares	70	$ 48	19	$ 69
Cash and cash equivalents	54		54		88
Restricted cash	1		1		0
Accounts receivable, net	311		311		315
Due from unconsolidated affiliates	16		16		2
Inventories	41		41		38
Other current assets	22		22		16
Current assets	445		445		459
Due from unconsolidated affiliates	48		48		44
Goodwill and other intangible assets	838		838		819
Property, plant and equipment, net	2,528		2,528		2,357
Other noncurrent assets	39		39		39
Noncurrent assets	3,453		3,453		3,259
Short-term debt	38		38		55
Accounts payable	175		175		176
Current portion of long-term debt and finance leases	22		22		29
Other current liabilities	101		101		108
Current liabilities	336		336		368
Long-term debt and finance leases	753		753		708
Deferred income taxes	273		273		250
Other noncurrent liabilities	64		64		55
Noncurrent liabilities	1,090		1,090		1,013
Cumulative foreign translation adjustments	$ 460		$ 460		$ 506
Disposal Group 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%
Disposal Group 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%

[1] Derived from audited financial statements.