CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF UTILITY PROJECTS (Details) (San Diego Gas and Electric Company and Subsidiary [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013
South Orange County Reliability Enhancement [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	$ 473
Cleveland National Forest Transmissions Projects [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	$ 420