OTHER FINANCIAL DATA - OTHER INCOME (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Component of Other Income, Nonoperating [Line Items]
Allowance For equity funds used during construction	$ 25		$ 15
Investment gains (losses)	8	[1]	10	[1]
Gains on interest rate and foreign exchange instruments, net	2		7
Regulatory Interest, net	1	[2]	1	[2]
Sundry, net	4		4
Total	40		37
San Diego Gas and Electric Company and Subsidiary [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance For equity funds used during construction	11		10
Regulatory Interest, net	1	[2]	1	[2]
Sundry, net	1		0
Total	13		11
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance For equity funds used during construction	5		5
Sundry, net	(1)		(1)
Total	$ 4		$ 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.