OTHER FINANCIAL DATA - OTHER INCOME (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	$ 24		$ 15		$ 49		$ 30
Investment gains (losses)	15	[1]	12	[1]	23	[1]	22	[1]
Gains (losses) on interest rate and foreign exchange instruments, net	11		6		16		13
Regulatory Interest, net	2	[2]	1	[2]	3	[2]	2	[2]
Sundry, net	(3)		(8)		(2)		(4)
Total	49		26		89		63
San Diego Gas and Electric Company and Subsidiary [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	7		10		18		20
Regulatory Interest, net	2	[2]	1	[2]	3	[2]	2	[2]
Sundry, net	(2)		(2)		(1)		(2)
Total	7		9		20		20
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	6		5		11		10
Sundry, net	(3)		(2)		(4)		(3)
Total	$ 3		$ 3		$ 7		$ 7

[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.