CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES
Utilities operating revenue	$ 2,560	$ 2,301	$ 7,839	$ 7,199
Energy-related businesses	453	343	1,174	1,000
Total revenues	3,013	2,644	9,013	8,199
Operating expenses
Operation and maintenance	(1,073)	(1,018)	(3,098)	(2,767)
Aliso Canyon litigation and regulatory matters	(1,571)	(27)	(1,571)	(127)
Depreciation and amortization	(471)	(418)	(1,376)	(1,242)
Franchise fees and other taxes	(151)	(139)	(442)	(397)
Operating expenses
Aliso Canyon litigation and regulatory matters	1,571	27	1,571	127
Other (expense) income, net	(55)	29	52	(163)
Interest income	16	27	50	76
Interest expense	(259)	(264)	(776)	(818)
(Loss) income from continuing operations before income taxes and equity earnings	(1,365)	201	(316)	1,061
Income tax benefit (expense)	342	(99)	45	(60)
Equity earnings	391	326	1,022	822
(Loss) income from continuing operations, net of income tax	(632)	428	751	1,823
(Loss) income from discontinued operations, net of income tax	0	(7)	0	1,850
Net (loss) income	(632)	421	751	3,673
Earnings attributable to noncontrolling interests	(5)	(22)	(48)	(201)
Preferred dividends	(11)	(48)	(52)	(121)
Preferred dividends of subsidiary	0	0	(1)	(1)
(Losses) earnings attributable to common shares	$ (648)	$ 351	$ 650	$ 3,350
Basic EPS:
(Losses) earnings from continuing operations (in dollars per share)	$ (2.03)	$ 1.23	$ 2.10	$ 5.17
(Losses) earnings from discontinued operations (in dollars per share)	0	(0.02)	0	6.31
(Losses) earnings (in dollars per share)	$ (2.03)	$ 1.21	$ 2.10	$ 11.48
Weighted-average common shares outstanding	319,144	289,490	309,350	291,771
Diluted EPS:
(Losses) earnings from continuing operations (in dollars per share)	$ (2.03)	$ 1.23	$ 2.09	$ 5.15
(Losses) earnings from discontinued operations (in dollars per share)	0	(0.02)	0	6.28
(Losses) earnings from continuing operations attributable to common shares (in dollars per share)	$ (2.03)	$ 1.21	$ 2.09	$ 11.43
Weighted-average common shares outstanding, diluted (in shares)	319,144	290,582	310,854	292,935
Natural gas [Member]
Operating expenses
Operating expenses	$ (282)	$ (114)	$ (892)	$ (582)
Electric fuel and purchased power [Member]
Operating expenses
Operating expenses	(312)	(429)	(828)	(918)
Energy-related businesses [Member]
Operating expenses
Operating expenses	(220)	(90)	(448)	(200)
San Diego Gas and Electric Company [Member]
REVENUES
Electric	1,307	1,338	3,534	3,478
Natural gas	157	134	585	498
Utilities operating revenue	1,464	1,472	4,119	3,976
Operating expenses
Cost of electric fuel and purchased power	324	430	869	921
Cost of natural gas	37	27	159	118
Operation and maintenance	389	414	1,152	1,050
Depreciation and amortization	226	200	659	598
Franchise fees and other taxes	93	86	264	237
Total operating expenses	1,069	1,157	3,103	2,924
Operating income	395	315	1,016	1,052
Other (expense) income, net	4	(2)	61	47
Interest income	0	1	1	2
Interest expense	(104)	(103)	(307)	(307)
(Loss) income from continuing operations before income taxes and equity earnings	295	211	771	794
Income tax benefit (expense)	(90)	(33)	(168)	(161)
Net (loss) income			603	633
(Losses) earnings attributable to common shares	205	178	603	633
Southern California Gas Company [Member]
REVENUES
Utilities operating revenue	1,106	842	3,738	3,247
Operating expenses
Aliso Canyon litigation and regulatory matters	(1,571)	(27)	(1,571)	(127)
Operating expenses
Cost of natural gas	240	92	736	476
Operation and maintenance	546	494	1,574	1,399
Aliso Canyon litigation and regulatory matters	1,571	27	1,571	127
Depreciation and amortization	180	165	533	486
Franchise fees and other taxes	54	48	163	142
Total operating expenses	2,591	826	4,577	2,630
Operating income	(1,485)	16	(839)	617
Other (expense) income, net	(39)	(7)	(2)	21
Interest income	0	0	0	2
Interest expense	(39)	(39)	(118)	(119)
(Loss) income from continuing operations before income taxes and equity earnings	(1,563)	(30)	(959)	521
Income tax benefit (expense)	437	6	335	(95)
Net (loss) income	(1,126)	(24)	(624)	426
Preferred dividends	0	0	(1)	(1)
(Losses) earnings attributable to common shares	$ (1,126)	$ (24)	$ (625)	$ 425