DERIVATIVE FINANCIAL INSTRUMENTS 5 (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Cash Flow Hedge Disclosure [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 20
Maximum Length Time Hedged In Cash Flow Hedge	13 years
Joint Venture Maximum Length Of Time Hedged In Cash Flow Hedge	20 years
Cash Flow Hedge Gain (Loss) To Be Reclassified Within Twelve Months For Noncontrolling Interest	$ 13
San Diego Gas and Electric Company [Member]
Cash Flow Hedge Disclosure [Line Items]
Maximum Length Time Hedged In Cash Flow Hedge	4 years
Cash Flow Hedge Gain (Loss) To Be Reclassified Within Twelve Months For Noncontrolling Interest	$ 13
Southern California Gas Company [Member]
Cash Flow Hedge Disclosure [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 0