OTHER FINANCIAL DATA - OTHER INCOME (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		$ 31	$ 24	$ 58	$ 49
Investment gains (losses)	[1]	(2)	15	7	23
Gains (losses) on interest rate and foreign exchange instruments, net		(3)	11	(3)	16
Regulatory Interest, net	[2]	1	2	2	3
Sundry, net		8	(7)	11	(6)
Foreign currency gain (losses)		(2)	1	(3)	1
Electrical infrastructure relocation income	[3]	4	3	4	3
Total		37	49	76	89
San Diego Gas and Electric Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		10	7	18	18
Regulatory Interest, net	[2]	1	2	2	3
Sundry, net		(2)	(2)	(2)	(1)
Total		9	7	18	20
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		10	6	19	11
Sundry, net		(1)	(3)	(2)	(4)
Total		$ 9	$ 3	$ 17	$ 7

[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] Interest on regulatory balancing accounts.

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