DEBT AND CREDIT FACILITIES 2 (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Sempra Mexico [Member]
Debt Instrument [Line Items]
Debt Proceeds Used For Repayment of Intercompany Debt		$ 357
Other Long Term Debt, Fixed Rate Due 2014 [Member] | Chilquinta Energia [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		306
Retired Debt Instrument, Face Amount	86
Retired Debt Instrument, Interest Rate, Stated Percentage	2.75%
Other Long Term Debt, Fixed Rate Due 2014 [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Debt Instrument [Line Items]
Retired Debt Instrument, Face Amount	115
Retired Debt Instrument, Interest Rate, Stated Percentage	5.90%
Other Long Term Debt, Fixed Rate Due 2021 [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Debt Instrument [Line Items]
Retired Debt Instrument, Face Amount	60
Retired Debt Instrument, Interest Rate, Stated Percentage	5.85%
Other Long Term Debt, Fixed Rate Due 2023 [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	450
Debt Instrument, Interest Rate, Stated Percentage	3.60%
Other Long Term Debt, Fixed Rate Due 2023 [Member] | Sempra Mexico [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.30%
Debt Instrument, Interest Rate, After Cross Currency Swap		4.12%
Other Long Term Debt, Floating Rate Due 2018 [Member] | Sempra Mexico [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		102
Debt Instrument, Interest Rate, Stated Percentage		2.66%
Other Long Term Debt, Variable Rate Due May 2023 [Member] | Copper Mountain Solar 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate At Period End		2.81%
Other Long Term Debt, Due May 2023 [Member] | Copper Mountain Solar 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maximum Borrowing Amount		286
Debt Instrument, Outstanding Borrowings		$ 146
Other Long Term Debt, Floating to Fixed Rate Due May 2023 [Member] | Copper Mountain Solar 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, After Floating To Fixed Swap		5.33%