SEMPRA UTILITIES' REGULATORY MATTERS (Details) (USD $)	3 Months Ended
	Sep. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member] | Wind Farm Project [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost, Maximum	$ 250,000,000
Investment As Percentage Of Total Estimated Project Cost	64.99%
San Diego Gas and Electric Company and Subsidiary [Member] | Pipeline Safety Phase 1 [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	600,000,000
Estimated Capital Investment	230,000,000
Requested Project Funding	240,000,000
Southern California Gas Company [Member] | Pipeline Safety Phase 1 [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	2,500,000,000
Estimated Capital Investment	1,200,000,000
Requested Project Funding	1,500,000,000
Pipeline Safety Phase 1 [Member]
Schedule Of Utility Projects [Line Items]
Estimated Project Cost	3,100,000,000
San Diego Gas and Electric Company and Subsidiary [Member]
Schedule Of Regulatory Amounts [Line Items]
Renewable Portfolio Standards, Penalty Per Kilowatt Hour Of Renewable Energy Underdelivery	0.05
General Rate Case, Annual Revenue Requirement Increase	231,000,000
General Rate Case, Percentage Annual Revenue Requirement Increase	14.30%
Unrecorded Energy Efficiency Incentive Mechanism Award	15,100,000
Regulatory Recovery, Deductible Per Event	5,000,000
Incremental insurance costs incurred related to catastrophe for 2009-2010 policy period	29,000,000
Incremental insurance costs incurred related to catastrophe for 2010-2011 policy period	63,000,000
General Rate Case, Revenue Requirement Request	1,845,000,000
Purchase Price Allocation Plant	215,000,000
Southern California Gas Company [Member]
Schedule Of Regulatory Amounts [Line Items]
General Rate Case, Annual Revenue Requirement Increase	263,000,000
General Rate Case, Percentage Annual Revenue Requirement Increase	14.30%
Unrecorded Gas Cost Incentive Mechanism Award	6,200,000
Unrecorded Energy Efficiency Incentive Mechanism Award	2,000,000
General Rate Case, Revenue Requirement Request	2,107,000,000
Recognized Gas Cost Incentive Mechanism Award 2009-2010	6,000,000
Recognized Gas Cost Incentive Mechanism Award 2008-2009	$ 12,000,000
Market Indexed Capital Adjustment Mechanism Benchmark Rate	5.38%
Market Indexed Capital Adjustment Mechanism Floor Rate	3.88%
Market Indexed Capital Adjustment Mechanism Ceiling Rate	6.88%