OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	$ 4	$ 5	$ 10	$ 11
AFUDC related to equity	24	15	49	30
Other capitalized financing costs	8	8	16	13
Total capitalized financing costs	36	28	75	54
San Diego Gas and Electric Company and Subsidiary [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	3	4	7	8
AFUDC related to equity	7	10	18	20
Total capitalized financing costs	10	14	25	28
Southern California Gas Company [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	1	1	3	3
AFUDC related to equity	6	5	11	10
Total capitalized financing costs	$ 7	$ 6	$ 14	$ 13