OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	$ 6	$ 6
AFUDC related to equiity	25	15
Other capitalized financing costs	8	5
Total capitalized financing costs	39	26
San Diego Gas and Electric Company and Subsidiary [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	4	4
AFUDC related to equiity	11	10
Total capitalized financing costs	15	14
Southern California Gas Company [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	2	2
AFUDC related to equiity	5	5
Total capitalized financing costs	$ 7	$ 7