CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF REGULATORY AMOUNTS 3 (Details) (Southern California Gas Company [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended				36 Months Ended
	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Impact Of 2010 Tax Act [Line Items]
Increase Due To Bonus Depreciation Extension, Net Of Tax	$ 1,400	$ 2,500					$ 11,300
Increase Due To Bonus Depreciation Extension, Before Tax			$ 6,600	$ 6,400	$ 6,300	$ 6,400
First Quarter [Member]
Seasonal Factors [Line Items]
Percentage Revenue Recognized Straight Line	25.00%
Percentage Revenue Recognized Seasonal	34.00%
Second Quarter [Member]
Seasonal Factors [Line Items]
Percentage Revenue Recognized Straight Line	25.00%
Percentage Revenue Recognized Seasonal	21.00%
Third Quarter [Member]
Seasonal Factors [Line Items]
Percentage Revenue Recognized Straight Line	25.00%
Percentage Revenue Recognized Seasonal	16.00%
Fourth Quarter [Member]
Seasonal Factors [Line Items]
Percentage Revenue Recognized Straight Line	25.00%
Percentage Revenue Recognized Seasonal	29.00%