CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
REVENUES
Utilities operating revenue	$ 2,301	$ 2,398	$ 7,199	$ 6,808
Energy-related businesses	343	360	1,000	1,078
Total revenues	2,644	2,758	8,199	7,886
Operating expenses
Operation and maintenance	(1,044)	(845)	(2,893)	(2,515)
Depreciation and amortization	(418)	(402)	(1,242)	(1,174)
Franchise fees and other taxes	(139)	(127)	(397)	(369)
Impairment losses	(1)	(43)	(1)	(43)
(Loss) gain on sale of assets	0	(3)	0	63
Operating expenses
Impairment losses	1	43	1	43
Other income (expense), net	29	(7)	(163)	103
Interest income	27	22	76	64
Interest expense	(264)	(279)	(818)	(797)
Income from continuing operations before income taxes and equity earnings	201	448	1,061	1,235
Income tax expense	(99)	(61)	(60)	(150)
Equity earnings	326	266	822	485
Income from continuing operations, net of income tax	428	653	1,823	1,570
(Loss) income from discontinued operations, net of income tax	(7)	256	1,850	292
Net income	421	909	3,673	1,862
Earnings attributable to noncontrolling interests	(22)	(60)	(201)	(146)
Preferred dividends	(48)	(36)	(121)	(107)
Preferred dividends of subsidiary	0	0	(1)	(1)
Earnings attributable to common shares	$ 351	$ 813	$ 3,350	$ 1,608
Basic EPS:
Earnings from continuing operations	$ 1.23	$ 2.04	$ 5.17	$ 4.86
(Losses) earnings from discontinued operations	(0.02)	0.89	6.31	0.97
Earnings attributable to common shares (in usd per share)	$ 1.21	$ 2.93	$ 11.48	$ 5.83
Weighted-average common shares outstanding	289,490	277,360	291,771	275,684
Diluted EPS:
Earnings from continuing operations	$ 1.23	$ 2.00	$ 5.15	$ 4.79
(Losses) earnings from discontinued operations	(0.02)	0.84	6.28	0.95
Earnings from continuing operations attributable to common shares (in usd per share)	$ 1.21	$ 2.84	$ 11.43	$ 5.74
Weighted-average common share outstanding, diluted	290,582	295,789	292,935	279,809
Natural gas [Member]
Operating expenses
Operating expenses	$ (114)	$ (122)	$ (582)	$ (789)
Electric fuel and purchased power [Member]
Operating expenses
Operating expenses	(429)	(410)	(918)	(929)
Energy-related businesses [Member]
Operating expenses
Operating expenses	(90)	(94)	(200)	(265)
San Diego Gas and Electric Company [Member]
REVENUES
Electric	1,338	1,271	3,478	3,184
Natural gas	134	156	498	482
Utilities operating revenue	1,472	1,427	3,976	3,666
Operating expenses
Cost of electric fuel and purchased power	430	411	921	934
Cost of natural gas	27	23	118	136
Operation and maintenance	414	295	1,050	857
Depreciation and amortization	200	196	598	571
Franchise fees and other taxes	86	79	237	220
Total operating expenses	1,157	1,004	2,924	2,718
Operating income	315	423	1,052	948
Other income (expense), net	(2)	19	47	60
Interest income	1	1	2	3
Interest expense	(103)	(106)	(307)	(311)
Income from continuing operations before income taxes and equity earnings	211	337	794	700
Income tax expense	(33)	(71)	(161)	(111)
Net income	178	266	633	589
Earnings attributable to noncontrolling interests	0	(3)	0	(7)
Earnings attributable to common shares	178	263	633	582
Southern California Gas Company [Member]
REVENUES
Utilities operating revenue	842	975	3,247	3,142
Operating expenses
Impairment losses	0	(37)	0	(37)
Operating expenses
Cost of natural gas	92	101	476	660
Operation and maintenance	521	427	1,526	1,291
Depreciation and amortization	165	154	486	449
Franchise fees and other taxes	48	43	142	132
Impairment losses	0	37	0	37
Total operating expenses	826	762	2,630	2,569
Operating income	16	213	617	573
Other income (expense), net	(7)	1	21	18
Interest income	0	0	2	1
Interest expense	(39)	(36)	(119)	(104)
Income from continuing operations before income taxes and equity earnings	(30)	178	521	488
Income tax expense	6	(35)	(95)	(50)
Net income	(24)	143	426	438
Preferred dividends	0	0	(1)	(1)
Earnings attributable to common shares	$ (24)	$ 143	$ 425	$ 437