ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - DISCONTINUED OPERATIONS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of income tax	$ (42)	$ 28
(Losses) earnings from discontinued operations attributable to common shares	(51)	21
Cash and cash equivalents	67		$ 88
Noncurrent assets	3,388		3,259	[1]
Current liabilities	375		368	[1]
Noncurrent liabilities	1,046		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	457		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	421	426
Cost of sales	(265)	(293)
Operating expenses	(45)	(54)
Interest and other	(3)	(5)
Income before income taxes and equity earnings of unconsolidated entities	108	74
Income tax expense	(151)	(47)
Equity earnings	1	1
(Loss) income from discontinued operations, net of income tax	(42)	28
Earnings attributable to noncontrolling interests	(9)	(7)
(Losses) earnings from discontinued operations attributable to common shares	(51)	$ 21
Cash and cash equivalents	67		88
Accounts receivable, net	331		315
Due from unconsolidated affiliates	3		2
Inventories	41		38
Other current assets	15		16
Current assets	457		459
Due from unconsolidated affiliates	46		44
Goodwill and other intangible assets	834		819
Property, plant and equipment, net	2,459		2,357
Other noncurrent assets	49		39
Noncurrent assets	3,388		3,259
Short-term debt	46		55
Accounts payable	188		176
Current portion of long-term debt and finance leases	22		29
Other current liabilities	119		108
Current liabilities	375		368
Long-term debt and finance leases	721		708
Deferred income taxes	263		250
Other noncurrent liabilities	62		55
Noncurrent liabilities	$ 1,046		$ 1,013
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%
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%

[1] Derived from audited financial statements.