OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	$ 5,000,000	$ 6,000,000	$ 15,000,000	$ 17,000,000
AFUDC related to equity	28,000,000	14,000,000	77,000,000	44,000,000
Other capitalized financing costs	6,000,000	9,000,000	22,000,000	22,000,000
Total capitalized financing costs	39,000,000	29,000,000	114,000,000	83,000,000
AFUDC equity related pipeline project	14,000,000		34,000,000
San Diego Gas and Electric Company and Subsidiary [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	3,000,000	4,000,000	10,000,000	12,000,000
AFUDC related to equity	8,000,000	10,000,000	26,000,000	30,000,000
Total capitalized financing costs	11,000,000	14,000,000	36,000,000	42,000,000
Southern California Gas Company [Member]
Capitalized Financing Costs Disclosure [Line Items]
AFUDC related to debt	2,000,000	2,000,000	5,000,000	5,000,000
AFUDC related to equity	7,000,000	4,000,000	18,000,000	14,000,000
Total capitalized financing costs	$ 9,000,000	$ 6,000,000	$ 23,000,000	$ 19,000,000