CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 2,305	$ 435	$ 3,252	$ 953
Other comprehensive income (loss):
Total other comprehensive (loss) income	651	(37)	368	(48)
Pretax amount [Member]
Net income	3,619	466	4,229	1,136
Other comprehensive income (loss):
Foreign currency translation adjustments	662	14	524	46
Financial instruments	(15)	(90)	(203)	(158)
Pension and other postretirement benefits	(3)	21	21	25
Total other comprehensive (loss) income	644	(55)	342	(87)
Comprehensive income	4,263	411	4,571	1,049
Preferred dividends of subsidiary	(1)	(1)	(1)	(1)
Comprehensive (loss) income, after preferred dividends of subsidiary	4,262	410	4,570	1,048
Income tax (expense) benefit [Member]
Net income	(1,342)	(76)	(1,156)	(269)
Other comprehensive income (loss):
Foreign currency translation adjustments	0	0	0	0
Financial instruments	4	30	57	52
Pension and other postretirement benefits	0	(6)	(2)	(7)
Total other comprehensive (loss) income	4	24	55	45
Comprehensive income	(1,338)	(52)	(1,101)	(224)
Preferred dividends of subsidiary	0	0	0	0
Comprehensive (loss) income, after preferred dividends of subsidiary	(1,338)	(52)	(1,101)	(224)
Net-of-tax amount [Member]
Net income	2,277	390	3,073	867
Other comprehensive income (loss):
Foreign currency translation adjustments	662	14	524	46
Financial instruments	(11)	(60)	(146)	(106)
Pension and other postretirement benefits	(3)	15	19	18
Total other comprehensive (loss) income	648	(31)	397	(42)
Comprehensive income	2,925	359	3,470	825
Preferred dividends of subsidiary	(1)	(1)	(1)	(1)
Comprehensive (loss) income, after preferred dividends of subsidiary	2,924	358	3,469	824
Noncontrolling Interests (after-tax) [Member]
Net income	28	45	179	86
Other comprehensive income (loss):
Foreign currency translation adjustments	5	2	(15)	6
Financial instruments	(2)	(8)	(14)	(12)
Pension and other postretirement benefits	0	0	0	0
Total other comprehensive (loss) income	3	(6)	(29)	(6)
Comprehensive income	31	39	150	80
Preferred dividends of subsidiary	0	0	0	0
Comprehensive (loss) income, after preferred dividends of subsidiary	31	39	150	80
Total [Member]
Net income	2,305	435	3,252	953
Other comprehensive income (loss):
Foreign currency translation adjustments	667	16	509	52
Financial instruments	(13)	(68)	(160)	(118)
Pension and other postretirement benefits	(3)	15	19	18
Total other comprehensive (loss) income	651	(37)	368	(48)
Comprehensive income	2,956	398	3,620	905
Preferred dividends of subsidiary	(1)	(1)	(1)	(1)
Comprehensive (loss) income, after preferred dividends of subsidiary	2,955	397	3,619	904
San Diego Gas and Electric Company [Member]
Net income	193	146	455	323
Other comprehensive income (loss):
Total other comprehensive (loss) income	4	1	4	2
San Diego Gas and Electric Company [Member] | Pretax amount [Member]
Net income	263	178	583	359
Other comprehensive income (loss):
Financial instruments				0
Pension and other postretirement benefits	5	1	5	1
Total other comprehensive (loss) income	5	1	5	1
Comprehensive (loss) income, after preferred dividends of subsidiary	268	179	588	360
San Diego Gas and Electric Company [Member] | Income tax (expense) benefit [Member]
Net income	(70)	(35)	(128)	(40)
Other comprehensive income (loss):
Financial instruments				0
Pension and other postretirement benefits	(1)	0	(1)	0
Total other comprehensive (loss) income	(1)	0	(1)	0
Comprehensive (loss) income, after preferred dividends of subsidiary	(71)	(35)	(129)	(40)
San Diego Gas and Electric Company [Member] | Net-of-tax amount [Member]
Net income	193	143	455	319
Other comprehensive income (loss):
Financial instruments				0
Pension and other postretirement benefits	4	1	4	1
Total other comprehensive (loss) income	4	1	4	1
Comprehensive (loss) income, after preferred dividends of subsidiary	197	144	459	320
San Diego Gas and Electric Company [Member] | Noncontrolling Interests (after-tax) [Member]
Net income	0	3	0	4
Other comprehensive income (loss):
Financial instruments				1
Pension and other postretirement benefits	0	0	0	0
Total other comprehensive (loss) income	0	0	0	1
Comprehensive (loss) income, after preferred dividends of subsidiary	0	3	0	5
San Diego Gas and Electric Company [Member] | Total [Member]
Net income	193	146	455	323
Other comprehensive income (loss):
Financial instruments				1
Pension and other postretirement benefits	4	1	4	1
Total other comprehensive (loss) income	4	1	4	2
Comprehensive (loss) income, after preferred dividends of subsidiary	197	147	459	325
Southern California Gas Company [Member]
Net income	147	31	450	295
Other comprehensive income (loss):
Total other comprehensive (loss) income	1	4	1	4
Southern California Gas Company [Member] | Pretax amount [Member]
Net income	196	27	551	310
Other comprehensive income (loss):
Pension and other postretirement benefits	1	6	1	6
Total other comprehensive (loss) income	1	6	1	6
Comprehensive (loss) income, after preferred dividends of subsidiary	197	33	552	316
Southern California Gas Company [Member] | Income tax (expense) benefit [Member]
Net income	(49)	4	(101)	(15)
Other comprehensive income (loss):
Pension and other postretirement benefits	0	(2)	0	(2)
Total other comprehensive (loss) income	0	(2)	0	(2)
Comprehensive (loss) income, after preferred dividends of subsidiary	(49)	2	(101)	(17)
Southern California Gas Company [Member] | Net-of-tax amount [Member]
Net income	147	31	450	295
Other comprehensive income (loss):
Pension and other postretirement benefits	1	4	1	4
Total other comprehensive (loss) income	1	4	1	4
Comprehensive (loss) income, after preferred dividends of subsidiary	$ 148	$ 35	$ 451	$ 299