CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
REVENUES
Utilities operating revenue	$ 2,434	$ 2,233	$ 5,279	$ 4,898
Energy-related businesses	307	293	721	657
Total revenues	2,741	2,526	6,000	5,555
Operating expenses
Operation and maintenance	(1,024)	(898)	(2,025)	(1,749)
Aliso Canyon litigation and regulatory matters	0	0	0	(100)
Depreciation and amortization	(463)	(412)	(905)	(824)
Franchise fees and other taxes	(138)	(121)	(291)	(258)
Operating expenses
Other income (expense), net	72	62	107	(192)
Interest income	15	22	34	49
Interest expense	(258)	(274)	(517)	(554)
Income from continuing operations before income taxes and equity earnings	281	463	1,049	860
Income tax (expense) benefit	(139)	(168)	(297)	39
Equity earnings	313	233	631	496
Income from continuing operations, net of income tax	455	528	1,383	1,395
Income from discontinued operations, net of income tax	0	1,777	0	1,857
Net income	455	2,305	1,383	3,252
Earnings attributable to noncontrolling interests	(10)	(28)	(43)	(179)
Preferred dividends	(20)	(37)	(41)	(73)
Preferred dividends of subsidiary	(1)	(1)	(1)	(1)
Earnings attributable to common shares	$ 424	$ 2,239	$ 1,298	$ 2,999
Basic EPS:
Earnings from continuing operations (in dollars per share)	$ 1.38	$ 1.58	$ 4.27	$ 3.93
Earnings from discontinued operations (in dollars per share)	0	6.06	0	6.31
Earnings attributable to common shares (in dollars per share)	$ 1.38	$ 7.64	$ 4.27	$ 10.24
Weighted-average common shares outstanding	307,800	293,060	304,372	292,925
Diluted EPS:
Earnings from continuing operations (in dollars per share)	$ 1.37	$ 1.58	$ 4.24	$ 3.91
Earnings from discontinued operations (in dollars per share)	0	6.03	0	6.00
Earnings from continuing operations attributable to common shares (in dollars per share)	$ 1.37	$ 7.61	$ 4.24	$ 9.91
Weighted-average common shares outstanding, diluted (in shares)	308,607	294,155	306,284	307,962
Natural gas [Member]
Operating expenses
Operating expenses	$ (261)	$ (131)	$ (610)	$ (468)
Electric fuel and purchased power [Member]
Operating expenses
Operating expenses	(284)	(260)	(516)	(489)
Energy-related businesses [Member]
Operating expenses
Operating expenses	(119)	(51)	(228)	(110)
San Diego Gas and Electric Company [Member]
REVENUES
Electric	1,158	1,090	2,227	2,140
Natural gas	160	145	428	364
Utilities operating revenue	1,318	1,235	2,655	2,504
Operating expenses
Cost of electric fuel and purchased power	304	260	545	491
Cost of natural gas	40	31	122	91
Operation and maintenance	373	326	763	636
Depreciation and amortization	220	197	433	398
Franchise fees and other taxes	83	73	171	151
Total operating expenses	1,020	887	2,034	1,767
Operating income	298	348	621	737
Other income (expense), net	22	18	57	49
Interest income	0	0	1	1
Interest expense	(101)	(103)	(203)	(204)
Income from continuing operations before income taxes and equity earnings	219	263	476	583
Income tax (expense) benefit	(33)	(70)	(78)	(128)
Net income			398	455
Earnings attributable to common shares	186	193	398	455
Southern California Gas Company [Member]
REVENUES
Utilities operating revenue	1,124	1,010	2,632	2,405
Operating expenses
Aliso Canyon litigation and regulatory matters	0	0	0	(100)
Operating expenses
Cost of natural gas	223	106	496	384
Operation and maintenance	525	462	1,028	905
Depreciation and amortization	180	162	353	321
Franchise fees and other taxes	51	43	109	94
Total operating expenses	979	773	1,986	1,804
Operating income	145	237	646	601
Other income (expense), net	(2)	(2)	37	28
Interest income	0	1	0	2
Interest expense	(40)	(40)	(79)	(80)
Income from continuing operations before income taxes and equity earnings	103	196	604	551
Income tax (expense) benefit	(8)	(49)	(102)	(101)
Net income	95	147	502	450
Preferred dividends	(1)	(1)	(1)	(1)
Earnings attributable to common shares	$ 94	$ 146	$ 501	$ 449