CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
Comprehensive income, net of income tax
Net income	$ 290	$ 319	[1]	$ 615	$ 1,073	[1]
Foreign currency translation adjustments	88	(139)	[1]	125	(110)	[1]
Reclassification to net income of foreign currency translation adjustments related to equity method investments					(54)	[1],[2]
Financial instruments	(7)	(39)	[1]	(22)	(52)	[1]
Net actuarial gain	(10)	1	[1]	(5)	8	[1]
Total other comprehensive income (loss)	71	(177)	[1]	98	(208)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	361	142	[1]	713	865	[1]
Preferred dividends of subsidiaries	(2)	(1)	[1]	(5)	(6)	[1]
Comprehensive Income Net Of Tax	359	141	[1]	708	859	[1]
San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	188	136		401	283
Financial instruments	(4)	(25)		(13)	(34)
Net actuarial gain		1			1
Total other comprehensive income (loss)	(4)	(24)		(13)	(33)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	184	112		388	250
Southern California Gas Company [Member]
Comprehensive income, net of income tax
Net income	71	81		191	209
Financial instruments		1		1	2
Total other comprehensive income (loss)		1		1	2
Total Comprehensive Income Before Preferred Stock Dividend Requirements	71	82		192	211
Total Shareholders' Equity
Comprehensive income, net of income tax
Net income	270	290	[1]	571	1,052	[1]
Foreign currency translation adjustments	80	(132)	[1]	114	(109)	[1]
Reclassification to net income of foreign currency translation adjustments related to equity method investments					(54)	[1],[2]
Financial instruments	(3)	(14)	[1]	(9)	(18)	[1]
Net actuarial gain	(10)	1	[1]	(5)	8	[1]
Total other comprehensive income (loss)	67	(145)	[1]	100	(173)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	337	145	[1]	671	879	[1]
Preferred dividends of subsidiaries	(2)	(1)	[1]	(5)	(6)	[1]
Comprehensive Income Net Of Tax	335	144	[1]	666	873	[1]
Total Shareholders' Equity | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	176	115		378	277
Net actuarial gain		1			1
Total other comprehensive income (loss)		1			1
Total Comprehensive Income Before Preferred Stock Dividend Requirements	176	116		378	278
Noncontrolling Interests
Comprehensive income, net of income tax
Net income	20	29	[1]	44	21	[1]
Foreign currency translation adjustments	8	(7)	[1]	11	(1)	[1]
Financial instruments	(4)	(25)	[1]	(13)	(34)	[1]
Total other comprehensive income (loss)	4	(32)	[1]	(2)	(35)	[1]
Total Comprehensive Income Before Preferred Stock Dividend Requirements	24	(3)	[1]	42	(14)	[1]
Comprehensive Income Net Of Tax	24	(3)	[1]	42	(14)	[1]
Noncontrolling Interests | San Diego Gas and Electric Company and Subsidiary [Member]
Comprehensive income, net of income tax
Net income	12	21		23	6
Financial instruments	(4)	(25)		(13)	(34)
Total other comprehensive income (loss)	(4)	(25)		(13)	(34)
Total Comprehensive Income Before Preferred Stock Dividend Requirements	$ 8	$ (4)		$ 10	$ (28)

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

[2] Related to the acquisition of Chilquinta Energía and Luz del Sur.