CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES
Utilities operating revenue	$ 2,665	$ 2,515
Energy-related businesses	364	383
Total revenues	3,029	2,898
Operating expenses
Operation and maintenance	(951)	(832)
Depreciation and amortization	(412)	(383)
Franchise fees and other taxes	(137)	(130)
Operating expenses
Other (expense) income, net	(254)	82
Interest income	27	21
Interest expense	(280)	(260)
Income from continuing operations before income taxes and equity earnings	397	501
Income tax benefit (expense)	207	(42)
Equity earnings	263	101
Income from continuing operations, net of income tax	867	560
Income (loss) from discontinued operations, net of income tax	80	(42)
Net income	947	518
Earnings attributable to noncontrolling interests	(151)	(41)
Mandatory convertible preferred stock dividends	(36)	(36)
Earnings attributable to common shares	$ 760	$ 441
Basic EPS:
Earnings (losses) from continuing operations attributable to common shares (in usd per share)	$ 2.35	$ 1.79
Earnings from discontinued operations attributable to common shares (in usd per share)	0.25	(0.19)
Earnings attributable to common shares (in usd per share)	$ 2.60	$ 1.60
Weighted-average common shares outstanding	292,790	274,674
Diluted EPS:
Earnings (losses) from continuing operations attributable to common shares (in usd per share)	$ 2.30	$ 1.78
Earnings from discontinued operations attributable to common shares (in usd per share)	0.23	(0.19)
Earnings from continuing operations attributable to common shares (n usd per share)	$ 2.53	$ 1.59
Weighted-average common share outstanding, diluted	313,925	277,228
Natural gas [Member]
Operating expenses
Operating expenses	$ (337)	$ (531)
Electric fuel and purchased power [Member]
Operating expenses
Operating expenses	(229)	(256)
Energy-related businesses [Member]
Operating expenses
Operating expenses	(59)	(108)
San Diego Gas and Electric Company [Member]
REVENUES
Electric	1,050	940
Natural gas	219	205
Utilities operating revenue	1,269	1,145
Operating expenses
Cost of electric fuel and purchased power	231	258
Cost of natural gas	60	79
Operation and maintenance	310	286
Depreciation and amortization	201	186
Franchise fees and other taxes	78	74
Total operating expenses	880	883
Operating income	389	262
Other (expense) income, net	31	22
Interest income	1	1
Interest expense	(101)	(103)
Income from continuing operations before income taxes and equity earnings	320	182
Income tax benefit (expense)	(58)	(5)
Net income	262	177
Earnings attributable to noncontrolling interests	0	(1)
Earnings attributable to common shares	262	176
Southern California Gas Company [Member]
REVENUES
Utilities operating revenue	1,395	1,361
Operating expenses
Cost of natural gas	278	455
Operation and maintenance	543	410
Depreciation and amortization	159	147
Franchise fees and other taxes	51	48
Total operating expenses	1,031	1,060
Operating income	364	301
Other (expense) income, net	30	16
Interest income	1	0
Interest expense	(40)	(34)
Income from continuing operations before income taxes and equity earnings	355	283
Income tax benefit (expense)	(52)	(19)
Net income	303	264
Earnings attributable to common shares	$ 303	$ 264