CALIFORNIA UTILITIES' REGULATORY MATTERS - NUCLEAR PLANT (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended			18 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013 San Diego Gas and Electric Company and Subsidiary [Member]	May 31, 2013 San Diego Gas and Electric Company and Subsidiary [Member]	Jun. 06, 2013 Nuclear Plant, SDGE [Member]	Jun. 30, 2013 Nuclear Plant, SDGE [Member]
Nuclear Plant [Line Items]
Nuclear Plant, Ownership Percentage						20.00%
Nuclear Plant, Replacement Power Costs					$ 166
Nuclear Plant, Revenue Recognized Associated with SONGS					300
Nuclear Plant Investment [Line Items]
Nuclear Plant, Net Property, Plant and Equipment				512
Nuclear Plant, Materials Inventory				10
Loss From Plant Closure	200	200
Regulatory Asset, Nuclear Plant Closure			$ 322