DERIVATIVE FINANCIAL INSTRUMENTS 5 (Details) - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total
Cash Flow Hedge Disclosure [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 22
Maximum Length Time Hedged In Cash Flow Hedge
Joint Venture Maximum Length Of Time Hedged In Cash Flow Hedge
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
Cash Flow Hedge Gain (Loss) To Be Reclassified Within Twelve Months For Noncontrolling Interest	$ 12
Southern California Gas Company [Member]
Cash Flow Hedge Disclosure [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 0