CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011
Comprehensive income, net of income tax
Net income	$ 74	$ 494	[1]	$ 325	$ 754	[1]
Foreign currency translation adjustments	(34)	35	[1]	37	29	[1]
Reclassification to net income of foreign currency translation adjustments related to equity method investments		(54)	[1]		(54)	[1]
Financial instruments	(18)	(16)	[1]	(15)	(13)	[1]
Net actuarial gain	4	5	[1]	5	7	[1]
Total other comprehensive income (loss)	(48)	(30)	[1]	27	(31)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	26	464	[1]	352	723	[1]
Preferred dividends of subsidiaries	(1)	(3)	[1]	(3)	(5)	[1]
Comprehensive Income Net Of Tax	25	461	[1]	349	718	[1]
San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	101	53		213	147
Financial instruments	(9)	(10)		(9)	(9)
Total other comprehensive income (loss)	(9)	(10)		(9)	(9)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	92	43		204	138
Southern California Gas Company [Member]
Comprehensive income, net of income tax
Net income	54	60		120	128
Financial instruments	1	1		1	1
Total other comprehensive income (loss)	1	1		1	1
Total Comprehensive Income Before Preferred Stock Dividend Requirements	55	61		121	129
Total Shareholders' Equity
Comprehensive income, net of income tax
Net income	63	506	[1]	301	762	[1]
Foreign currency translation adjustments	(33)	29	[1]	34	23	[1]
Reclassification to net income of foreign currency translation adjustments related to equity method investments		(54)	[1]		(54)	[1]
Financial instruments	(9)	(6)	[1]	(6)	(4)	[1]
Net actuarial gain	4	5	[1]	5	7	[1]
Total other comprehensive income (loss)	(38)	(26)	[1]	33	(28)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	25	480	[1]	334	734	[1]
Preferred dividends of subsidiaries	(1)	(3)	[1]	(3)	(5)	[1]
Comprehensive Income Net Of Tax	24	477	[1]	331	729	[1]
Total Shareholders' Equity | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	96	72		202	162
Total Comprehensive Income Before Preferred Stock Dividend Requirements	96	72		202	162
Noncontrolling Interests
Comprehensive income, net of income tax
Net income	11	(12)	[1]	24	(8)	[1]
Foreign currency translation adjustments	(1)	6	[1]	3	6	[1]
Financial instruments	(9)	(10)	[1]	(9)	(9)	[1]
Total other comprehensive income (loss)	(10)	(4)	[1]	(6)	(3)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	1	(16)	[1]	18	(11)	[1]
Comprehensive Income Net Of Tax	1	(16)	[1]	18	(11)	[1]
Noncontrolling Interests | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	5	(19)		11	(15)
Financial instruments	(9)	(10)		(9)	(9)
Total other comprehensive income (loss)	(9)	(10)		(9)	(9)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	$ (4)	$ (29)		$ 2	$ (24)

[1] As adjusted for the retrospective effect of a change in accounting principle as we discuss in Note 1.