CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
REVENUES
Utilities operating revenue	$ 2,845	$ 2,665
Energy-related businesses	414	364
Total revenues	3,259	3,029
Operating expenses
Operation and maintenance	(1,001)	(851)
Aliso Canyon litigation and regulatory matters	0	(100)
Depreciation and amortization	(442)	(412)
Franchise fees and other taxes	(153)	(137)
Operating expenses
Other income (expense), net	35	(254)
Interest income	19	27
Interest expense	(259)	(280)
Income from continuing operations before income taxes and equity earnings	768	397
Income tax (expense) benefit	(158)	207
Equity earnings	318	263
Income from continuing operations, net of income tax	928	867
Income from discontinued operations, net of income tax	0	80
Net income	928	947
Earnings attributable to noncontrolling interests	(33)	(151)
Preferred dividends	(21)	(36)
Earnings attributable to common shares	$ 874	$ 760
Basic EPS:
Earnings from continuing operations	$ 2.91	$ 2.35
(Losses) earnings from discontinued operations	0	0.25
Earnings attributable to common shares (in dollars per share)	$ 2.91	$ 2.60
Weighted-average common shares outstanding	300,905	292,790
Diluted EPS:
Earnings from continuing operations	$ 2.87	$ 2.30
(Losses) earnings from discontinued operations	0	0.23
Earnings from continuing operations attributable to common shares (in usd per share)	$ 2.87	$ 2.53
Weighted-average common share outstanding, diluted	308,458	313,925
Natural gas [Member]
Operating expenses
Operating expenses	$ (349)	$ (337)
Electric fuel and purchased power [Member]
Operating expenses
Operating expenses	(232)	(229)
Energy-related businesses [Member]
Operating expenses
Operating expenses	(109)	(59)
San Diego Gas and Electric Company [Member]
REVENUES
Electric	1,069	1,050
Natural gas	268	219
Utilities operating revenue	1,337	1,269
Operating expenses
Cost of electric fuel and purchased power	241	231
Cost of natural gas	82	60
Operation and maintenance	390	310
Depreciation and amortization	213	201
Franchise fees and other taxes	88	78
Total operating expenses	1,014	880
Operating income	323	389
Other income (expense), net	35	31
Interest income	1	1
Interest expense	(102)	(101)
Income from continuing operations before income taxes and equity earnings	257	320
Income tax (expense) benefit	(45)	(58)
Net income	212	262
Earnings attributable to common shares	212	262
Southern California Gas Company [Member]
REVENUES
Utilities operating revenue	1,508	1,395
Operating expenses
Aliso Canyon litigation and regulatory matters	0	(100)
Operating expenses
Cost of natural gas	273	278
Operation and maintenance	503	443
Depreciation and amortization	173	159
Franchise fees and other taxes	58	51
Total operating expenses	1,007	1,031
Operating income	501	364
Other income (expense), net	39	30
Interest income	0	1
Interest expense	(39)	(40)
Income from continuing operations before income taxes and equity earnings	501	355
Income tax (expense) benefit	(94)	(52)
Net income	407	303
Earnings attributable to common shares	$ 407	$ 303