OTHER FINANCIAL DATA - OTHER INCOME (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		$ 27	$ 27
Investment gains (losses)	[1]	10	9
Electrical infrastructure relocation income	[2]	1	0
Gains (losses) on interest rate and foreign exchange instruments, net		3	0
Sale of other investments		1	0
Foreign currency gain (losses)		(2)	(1)
Regulatory Interest, net	[3]	2	1
Sundry, net		7	3
Total		49	39
San Diego Gas and Electric Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		11	8
Regulatory Interest, net	[3]	2	1
Sundry, net		1	0
Total		14	9
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
AFUDC related to equity		10	9
Sundry, net		0	(1)
Total		$ 10	$ 8

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

[3] Interest on regulatory balancing accounts.