OTHER FINANCIAL DATA - OTHER INCOME (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		$ 26	$ 28	$ 84	$ 77
Investment gains (losses)	[1]	(12)	(3)	(5)	20
Gains (losses) on interest rate and foreign exchange instruments, net		(4)	(6)	(7)	3
Foreign currency gain (losses)		(3)	(2)	(6)	(1)
Sale of other investments		2	1	8	1
Electrical infrastructure relocation income	[2]	0	4	4	7
Regulatory Interest, net	[3]	1	2	3	5
Sundry, net		2	5	7	6
Total		12	29	88	118
San Diego Gas and Electric Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		9	8	27	26
Regulatory Interest, net	[3]	1	2	3	5
Sundry, net		(2)	(1)	(4)	(2)
Total		8	9	26	29
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		10	7	29	18
Sundry, net		(2)	(1)	(4)	(5)
Total		$ 8	$ 6	$ 25	$ 13

[1] Represents investment (losses) gains on dedicated assets in support of our executive retirement and deferred compensation plans. These amounts are partially offset by corresponding changes in compensation expense related to the plans.

[2] Income at Luz del Sur associated with the relocation of electrical infrastructure.

[3] Interest on regulatory balancing accounts.