CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive income, net of income tax
Net income	$ 323	$ 290	$ 768	$ 615
Foreign currency translation adjustments	5	88	125	125
Financial instruments	(6)	(7)	21	(22)
Net actuarial gain	3	(10)	7	(5)
Total other comprehensive income (loss)	2	71	153	98
Total Comprehensive Income Before Preferred Stock Dividend Requirements	325	361	921	713
Preferred dividends of subsidiaries	(2)	(2)	(5)	(5)
Comprehensive Income Net Of Tax	323	359	916	708
San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	139	188	293	401
Financial instruments	(1)	(4)	14	(13)
Net actuarial gain	1	0	2	0
Total other comprehensive income (loss)	0	(4)	16	(13)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	139	184	309	388
Southern California Gas Company [Member]
Comprehensive income, net of income tax
Net income	102	71	267	191
Financial instruments			1	1
Total other comprehensive income (loss)	0	0	1	1
Total Comprehensive Income Before Preferred Stock Dividend Requirements	102	71	268	192
Total Shareholders' Equity
Comprehensive income, net of income tax
Net income	301	270	727	571
Foreign currency translation adjustments	5	80	149	114
Financial instruments	(4)	(3)	5	(9)
Net actuarial gain	3	(10)	7	(5)
Total other comprehensive income (loss)	4	67	161	100
Total Comprehensive Income Before Preferred Stock Dividend Requirements	305	337	888	671
Preferred dividends of subsidiaries	(2)	(2)	(5)	(5)
Comprehensive Income Net Of Tax	303	335	883	666
Total Shareholders' Equity | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	134	176	292	378
Financial instruments	0	0	0	0
Net actuarial gain	1	0	2	0
Total other comprehensive income (loss)	1	0	2	0
Total Comprehensive Income Before Preferred Stock Dividend Requirements	135	176	294	378
Noncontrolling Interests
Comprehensive income, net of income tax
Net income	22	20	41	44
Foreign currency translation adjustments	0	8	(24)	11
Financial instruments	(2)	(4)	16	(13)
Net actuarial gain	0	0	0	0
Total other comprehensive income (loss)	(2)	4	(8)	(2)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	20	24	33	42
Preferred dividends of subsidiaries	0	0	0
Comprehensive Income Net Of Tax	20	24	33	42
Noncontrolling Interests | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	5	12	1	23
Financial instruments	(1)	(4)	14	(13)
Net actuarial gain	0	0	0	0
Total other comprehensive income (loss)	(1)	(4)	14	(13)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	$ 4	$ 8	$ 15	$ 10