NUCLEAR PLANT - SETTLEMENT (Details) $ in Millions	3 Months Ended
	Dec. 31, 2015 USD ($)
To SDGE [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	$ 80
Nuclear Plant Insurance Recovery Allocation Percentage	5.00%
To SDGE [Member] | San Diego Gas and Electric Company [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	$ 80
Nuclear Plant Insurance Recovery Allocation Percentage	5.00%
Total Ownership [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	$ 400
Total Ownership [Member] | San Diego Gas and Electric Company [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	400
To Ratepayers [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	75
To Ratepayers [Member] | San Diego Gas and Electric Company [Member]
Nuclear Plant Insurance Settlement [Line Items]
Nuclear Plant Insurance Recoveries	$ 75