CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF REGULATORY AMOUNTS 1 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2014
San Diego Gas and Electric Company and Subsidiary [Member]
FERC Electric Transmission Formula Rate Filing [Line Items]
Authorized Ferc Return On Equity				10.05%
Ferc Return On Equity Requested				11.30%
Energy Resource Recovery Account [Line Items]
Authorized Energy Resource Recovery Revenue Requirement Trigger Increase Through Year End 2015				$ 221
Authorized 2013 Energy Resource Recovery Revenue Requirement				988
Requested 2014 Energy Resource Recovery Revenue Requirement				1,230
Requested 2014 Energy Resource Recovery Revenue Requirement Increase				242
San Diego Gas and Electric Company and Subsidiary [Member] | Year 2012 [Member]
General Rate Case [Line Items]
General Rate Case, Incremental Earnings Impact Recorded In Second Quarter 2013	17		52
General Rate Case, Cumulative Earnings Impact		69
General Rate Case, Regulatory Asset				203
General Rate Case, Noncurrent Regulatory Asset				41
San Diego Gas and Electric Company and Subsidiary [Member] | Year 2016 [Member]
General Rate Case [Line Items]
General Rate Case, Proposed Revenue Requirement Increase				168
General Rate Case, Percentage Increase In Electric Rate Requested				0.90%
General Rate Case, Percentage Increase In Gas Rate Requested				0.50%
Southern California Gas Company [Member] | Year 2012 [Member]
General Rate Case [Line Items]
General Rate Case, Incremental Earnings Impact Recorded In Second Quarter 2013	12		25
General Rate Case, Cumulative Earnings Impact		37
General Rate Case, Regulatory Asset				65
General Rate Case, Noncurrent Regulatory Asset				13
Southern California Gas Company [Member] | Year 2016 [Member]
General Rate Case [Line Items]
General Rate Case, Proposed Revenue Requirement Increase				$ 290
General Rate Case, Percentage Increase In Gas Rate Requested				5.50%