OTHER FINANCIAL DATA - INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 127	$ 178
Effective income tax rate	33.00%	51.00%
Income tax expense from corporate reorganization related to IEnova IPO		63
Income Tax On Repatriation of Foreign Earnings	12
San Diego Gas and Electric Company and Subsidiary [Member]
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	83	51
Effective income tax rate	45.00%	39.00%
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)	$ 38	$ 24
Effective income tax rate	33.00%	34.00%