OTHER FINANCIAL DATA - OTHER INCOME (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity	$ 27		$ 25
Investment gains (losses)	9	[1]	8	[1]
Gains (losses) on interest rate and foreign exchange instruments, net	0		2
Regulatory Interest, net	1	[2]	1	[2]
Sundry, net	3		4
Foreign currency gain (losses)	(1)		0
Total	39		40
San Diego Gas and Electric Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity	8		11
Regulatory Interest, net	1	[2]	1	[2]
Sundry, net	0		1
Total	9		13
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity	9		5
Sundry, net	(1)		(1)
Total	$ 8		$ 4

[1] Represents investment 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.