CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF REGULATORY AMOUNTS 2 (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Mar. 31, 2015
San Diego Gas and Electric Company [Member] | Years 2006 To 2008 [Member]
Utility Incentive Awards [Line Items]
Requested Energy Efficiency Awards	$ 16,200
Southern California Gas Company [Member] | Year 2014 [Member]
Utility Incentive Awards [Line Items]
Recognized Gas Cost Incentive Mechanism Award		$ 13,700
Southern California Gas Company [Member] | Year 2015 [Member]
Utility Incentive Awards [Line Items]
Requested Gas Cost Incentive Mechanism Award	7,250
Southern California Gas Company [Member] | Years 2006 To 2008 [Member]
Utility Incentive Awards [Line Items]
Requested Energy Efficiency Awards	$ 17,300