OTHER FINANCIAL DATA - INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 71	$ 117	$ 291	$ 327
Effective income tax rate	16.00%	27.00%	24.00%	30.00%
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	8		32
Louisiana Valuation Allowance Release	(25)		(25)
San Diego Gas and Electric Company and Subsidiary [Member]
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	65	84	217	147
Effective income tax rate	28.00%	38.00%	35.00%	33.00%
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)	$ 44	$ 38	$ 110	$ 107
Effective income tax rate	31.00%	27.00%	30.00%	29.00%