CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUES
Utilities	$ 2,598	$ 2,698	[1]
Energy-related businesses	364	333	[1]
Total revenues	2,962	3,031	[1]
Utilities:
Cost of electric fuel and purchased power	(546)	(527)	[1]
Cost of natural gas	(348)	(485)	[1]
Energy-related businesses:
Cost of natural gas, electric fuel and purchased power	(69)	(67)	[1]
Other cost of sales	(18)	(22)	[1]
Operation and maintenance	(781)	(719)	[1]
Depreciation and amortization	(386)	(360)	[1],[2]
Franchise fees and other taxes	(117)	(110)	[1]
Operating expenses
Other income, net	153	174	[1]
Interest income	33	6	[1]
Interest expense	(216)	(169)	[1]
Income before income taxes and equity losses of unconsolidated subsidiaries	667	752	[1]
Income tax expense	(289)	(295)	[1]
Equity losses	(20)	(5)	[1]
Net income	358	452	[1],[2]
Losses (earnings) attributable to noncontrolling interest	17	(11)	[1]
Mandatory convertible preferred stock dividends	(28)	0	[1]
Net Income/Earnings attributable to common shares	$ 347	$ 441	[1]
Basic earnings per common share (in dollars per share)	$ 1.34	$ 1.76	[1]
Weighted-average number of shares outstanding, basic	257,932	251,131	[1]
Diluted earnings per common share (in dollars per share)	$ 1.33	$ 1.75	[1]
Weighted-average number of shares outstanding, diluted	259,490	252,246	[1]
Dividends declared per share of common stock (in dollars per share)	$ 0.90	$ 0.82	[1]
San Diego Gas and Electric Company [Member]
Operating revenues
Electric	$ 884	$ 875	[1]
Natural gas	171	182	[1]
Total operating revenues	1,055	1,057	[1]
Operating expenses
Cost of electric fuel and purchased power	274	261	[1]
Cost of natural gas	50	65	[1]
Operation and maintenance	248	231	[1]
Depreciation and amortization	166	163	[1],[2]
Franchise fees and other taxes	69	63	[1]
Total operating expenses	807	783	[1]
Operating income	248	274	[1]
Other income, net	28	22	[1]
Interest income	1	0	[1]
Interest expense	(52)	(49)	[1]
Income before income taxes and equity losses of unconsolidated subsidiaries	225	247	[1]
Income tax expense	(56)	(90)	[1]
Net income	169	157	[1],[2]
Losses (earnings) attributable to noncontrolling interest	1	(2)	[1]
Net Income/Earnings attributable to common shares	170	155	[1]
Southern California Gas Company [Member]
Operating revenues
Total operating revenues	1,126	1,241	[1]
Operating expenses
Cost of natural gas	289	408	[1]
Operation and maintenance	384	356	[1]
Depreciation and amortization	135	126	[1],[2]
Franchise fees and other taxes	40	39	[1]
Total operating expenses	848	929	[1]
Operating income	278	312	[1]
Other income, net	33	14	[1]
Interest expense	(27)	(25)	[1]
Income before income taxes and equity losses of unconsolidated subsidiaries	284	301	[1]
Income tax expense	(59)	(98)	[1]
Net income	225	203	[2]
Net Income/Earnings attributable to common shares	$ 225	$ 203	[1]

[1] As adjusted for the retrospective adoption of ASU 2017-07, which we discuss in Note 2, and a reclassification to conform to current year presentation, which we discuss in Note 1.

[2] As adjusted for the retrospective adoption of ASU 2016-18, which we discuss in Note 2.