CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ 518	$ 358
Other comprehensive income (loss):
Total other comprehensive (loss) income	(11)	99
Pretax amount [Member]
Net income (loss)	670	664
Other comprehensive income (loss):
Foreign currency translation adjustments	32	24
Financial instruments	(68)	88
Pension and other postretirement benefits	4	3
Total other comprehensive (loss) income	(32)	115
Comprehensive income (loss)	638	779
Income tax (expense) benefit [Member]
Net income (loss)	(193)	(289)
Other comprehensive income (loss):
Foreign currency translation adjustments	0	0
Financial instruments	22	(30)
Pension and other postretirement benefits	(1)	(1)
Total other comprehensive (loss) income	21	(31)
Comprehensive income (loss)	(172)	(320)
Net-of-tax amount [Member]
Net income (loss)	477	375
Other comprehensive income (loss):
Foreign currency translation adjustments	32	24
Financial instruments	(46)	58
Pension and other postretirement benefits	3	2
Total other comprehensive (loss) income	(11)	84
Comprehensive income (loss)	466	459
Noncontrolling Interests (after-tax) [Member]
Net income (loss)	41	(17)
Other comprehensive income (loss):
Foreign currency translation adjustments	4	5
Financial instruments	(4)	10
Pension and other postretirement benefits	0	0
Total other comprehensive (loss) income	0	15
Comprehensive income (loss)	41	(2)
Total [Member]
Net income (loss)	518	358
Other comprehensive income (loss):
Foreign currency translation adjustments	36	29
Financial instruments	(50)	68
Pension and other postretirement benefits	3	2
Total other comprehensive (loss) income	(11)	99
Comprehensive income (loss)	507	457
San Diego Gas and Electric Company [Member]
Net income (loss)	177	169
Other comprehensive income (loss):
Total other comprehensive (loss) income	1	4
San Diego Gas and Electric Company [Member] | Pretax amount [Member]
Net income (loss)	181	226
Other comprehensive income (loss):
Financial instruments	0	0
Total other comprehensive (loss) income	0	0
Comprehensive income (loss)	181	226
San Diego Gas and Electric Company [Member] | Income tax (expense) benefit [Member]
Net income (loss)	(5)	(56)
Other comprehensive income (loss):
Financial instruments	0	0
Total other comprehensive (loss) income	0	0
Comprehensive income (loss)	(5)	(56)
San Diego Gas and Electric Company [Member] | Net-of-tax amount [Member]
Net income (loss)	176	170
Other comprehensive income (loss):
Financial instruments	0	0
Total other comprehensive (loss) income	0	0
Comprehensive income (loss)	176	170
San Diego Gas and Electric Company [Member] | Noncontrolling Interests (after-tax) [Member]
Net income (loss)	1	(1)
Other comprehensive income (loss):
Financial instruments	1	4
Total other comprehensive (loss) income	1	4
Comprehensive income (loss)	2	3
San Diego Gas and Electric Company [Member] | Total [Member]
Net income (loss)	177	169
Other comprehensive income (loss):
Financial instruments	1	4
Total other comprehensive (loss) income	1	4
Comprehensive income (loss)	178	173
Southern California Gas Company [Member]
Net income (loss)	264	225
Southern California Gas Company [Member] | Pretax amount [Member]
Other comprehensive income (loss):
Comprehensive income (loss)	283	284
Southern California Gas Company [Member] | Income tax (expense) benefit [Member]
Other comprehensive income (loss):
Comprehensive income (loss)	(19)	(59)
Southern California Gas Company [Member] | Net-of-tax amount [Member]
Other comprehensive income (loss):
Comprehensive income (loss)	$ 264	$ 225