DEBT AND CREDIT FACILITIES 2 (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Other Long Term Debt, Fixed Rate Due 2017 [Member] | Sempra Energy [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600
Debt Instrument, Interest Rate, Stated Percentage	2.30%
Other Long Term Debt, Fixed Rate Due 2042 [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	250
Debt Instrument, Interest Rate, Stated Percentage	4.30%
Other Long Term Debt, Floating Rate Due 2028 [Member] | Copper Mountain Solar I [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	117
Debt Instrument, Interest Rate, Stated Percentage	2.043%
Debt Instrument, Interest Rate At Period End	3.23%
Debt Instrument, Floating To Fixed Interest Rate Swap	$ 88