CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Property, plant and equipment related to VIE	$ 496	$ 516
Long-term debt related to VIE	347	355
Shareholders' equity:
Preferred stock, shares authorized	50	50
Common stock, shares authorized	750	750
Common stock, shares outstanding	240	240
San Diego Gas and Electric Company and Subsidiary [Member]
Property, plant and equipment related to VIE	496	516
Long-term debt related to VIE	$ 347	$ 355
Shareholders' equity:
Common stock, shares authorized	255	255
Common stock, shares outstanding	117	117
Southern California Gas Company [Member]
Shareholders' equity:
Common stock, shares authorized	100	100
Common stock, shares outstanding	91	91