CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF UTILITY PROJECTS 1 (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 11, 2014 USD ($)
Pipeline Safety Enhancement Plan [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Pipeline Safety Plan Regulatory Account	$ 7,000		$ 100
Recovery Requested, PSEP Costs	100
Pipeline Safety Enhancement Plan [Member] | Southern California Gas Company [Member]
Schedule Of Utility Projects [Line Items]
Disallowed Costs Impact On Earnings After Tax		$ 5,000
Pipeline Safety Plan Regulatory Account	153,000		$ 46,000
Recovery Requested, PSEP Costs	26,800
ORA Recommended Disallowance	11,100
ORA Recommended Recovery	15,700
TURN Recommended Disallowance	2,300
TURN Recommended Recovery	24,500
South Orange County Reliability Enhancement [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost, Lower Range	350,000
Estimated Project Cost, Upper Range	400,000
Cleveland National Forest Transmissions Projects [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost, Lower Range	400,000
Estimated Project Cost, Upper Range	450,000
Southern Gas System Member [Member] | Utility Subsidiaries [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost, Lower Range	800,000
Estimated Project Cost, Upper Range	850,000
Sycamore Penasquitos Transmission Project [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost, Lower Range	120,000
Estimated Project Cost, Upper Range	$ 150,000
Public Utilities Requested Basis Point Return On Equity Adder, Denied	100
Public Utilities Abandoned Plant Cost Recovery Approved, Percentage	100.00%
Revised Estimated Project Cost, Lower Range	$ 250,000
Revised Estimated Project Cost, Upper Range	300,000
Electric Vehicle Charging [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	103,000
Portion of Estimated Project Cost To Be Capitalized	$ 59,000
Number Of Charging Stations	5,500
Pipeline Safety And Reliability Project [Member] | Utility Subsidiaries [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	$ 600,000
Wildfire Cost Recovery [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Incurred Costs	2,400,000
Requested Recovery	379,000
Insurance Reimbursement	1,100,000
Third Party Settlement Recoveries	824,000
FERC Jurisdictional Rates	$ 80,000
Voluntary Shareholder Contribution, Percentage	10.00%
WEMA Balance	$ 42,000
Pipeline Testing/Replacing 1956 to 1961 [Member] | San Diego Gas and Electric Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	3,000
Pipeline Testing/Replacing 1956 to 1961 [Member] | Southern California Gas Company [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	$ 5,000