OTHER FINANCIAL DATA - INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 93	$ 32	$ 220	$ 210
Effective income tax rate	25.00%	11.00%	29.00%	32.00%
Income tax expense from corporate reorganization related to IEnova IPO				63
Charge To Reduce Certain Tax Regulatory Assets Attributable To Nuclear Plant			17
Income Tax On Repatriation of Foreign Earnings	12		24
San Diego Gas and Electric Company and Subsidiary [Member]
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	69	12	152	63
Effective income tax rate	35.00%	14.00%	40.00%	29.00%
Charge To Reduce Certain Tax Regulatory Assets Attributable To Nuclear Plant			17
Southern California Gas Company [Member]
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 28	$ 45	$ 66	$ 69
Effective income tax rate	26.00%	27.00%	29.00%	29.00%