DEBT AND CREDIT FACILITIES - LONG TERM DEBT (Details) $ in Millions	Jun. 30, 2016 USD ($)
Other Long Term Debt, Variable Rate Due 2027 [Member] | San Diego Gas and Electric Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Early Redemption Of Long Term Debt Instruments	$ 105
Other Long Term Debt Fixed Rate Due 2026 [Member] | San Diego Gas and Electric Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Other Long Term Debt Fixed Rate Due 2026 [Member] | Southern California Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500
Debt Instrument, Interest Rate, Stated Percentage	2.60%