CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive income, net of income tax
Net income	$ 267	$ 74	$ 445	$ 325
Foreign currency translation adjustments	114	(34)	120	37
Financial instruments	38	(18)	27	(15)
Net actuarial gain	1	4	4	5
Total other comprehensive income (loss)	153	(48)	151	27
Total Comprehensive Income Before Preferred Stock Dividend Requirements	420	26	596	352
Preferred dividends of subsidiaries	(1)	(1)	(3)	(3)
Comprehensive Income Net Of Tax	419	25	593	349
San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	73	101	154	213
Financial instruments	12	(9)	15	(9)
Net actuarial gain	1		1
Total other comprehensive income (loss)	13	(9)	16	(9)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	86	92	170	204
Southern California Gas Company [Member]
Comprehensive income, net of income tax
Net income	119	54	165	120
Financial instruments	1	1	1	1
Total other comprehensive income (loss)	1	1	1	1
Total Comprehensive Income Before Preferred Stock Dividend Requirements	120	55	166	121
Total Shareholders' Equity
Comprehensive income, net of income tax
Net income	246	63	426	301
Foreign currency translation adjustments	134	(33)	144	34
Financial instruments	23	(9)	9	(6)
Net actuarial gain	1	4	4	5
Total other comprehensive income (loss)	158	(38)	157	33
Total Comprehensive Income Before Preferred Stock Dividend Requirements	404	25	583	334
Preferred dividends of subsidiaries	(1)	(1)	(3)	(3)
Comprehensive Income Net Of Tax	403	24	580	331
Total Shareholders' Equity | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	66	96	158	202
Net actuarial gain	1		1
Total other comprehensive income (loss)	1		1
Total Comprehensive Income Before Preferred Stock Dividend Requirements	67	96	159	202
Noncontrolling Interests
Comprehensive income, net of income tax
Net income	21	11	19	24
Foreign currency translation adjustments	(20)	(1)	(24)	3
Financial instruments	15	(9)	18	(9)
Total other comprehensive income (loss)	(5)	(10)	(6)	(6)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	16	1	13	18
Comprehensive Income Net Of Tax	16	1	13	18
Noncontrolling Interests | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	7	5	(4)	11
Financial instruments	12	(9)	15	(9)
Total other comprehensive income (loss)	12	(9)	15	(9)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	$ 19	$ (4)	$ 11	$ 2