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DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)
In Millions
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2011
S D G E Segment [Member]
Dec. 31, 2010
S D G E Segment [Member]
Jun. 30, 2011
So Cal Gas Segment [Member]
Jun. 30, 2011
Sempra Generation Segment [Member]
Dec. 31, 2010
Sempra Generation Segment [Member]
Jun. 30, 2011
Sempra Pipelines and Storage Segment [Member]
Dec. 31, 2010
Sempra Pipelines and Storage Segment [Member]
Jun. 30, 2011
Sempra L N G Segment [Member]
Dec. 31, 2010
Sempra L N G Segment [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Dec. 31, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Undesignated Derivatives
Other Operation And Maintenance [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Dec. 31, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Noncurrent Assets [Member]
Dec. 31, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Noncurrent Assets [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Dec. 31, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Jun. 30, 2011
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Noncurrent Liabilities [Member]
Dec. 31, 2010
San Diego Gas and Electric Company and Subsidiary [Member]
Fixed Price Contracts And Other Derivatives, Noncurrent Liabilities [Member]
Jun. 30, 2011
Southern California Gas Company [Member]
Dec. 31, 2010
Southern California Gas Company [Member]
Jun. 30, 2011
Southern California Gas Company [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Southern California Gas Company [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Southern California Gas Company [Member]
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Southern California Gas Company [Member]
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2011
Southern California Gas Company [Member]
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2010
Southern California Gas Company [Member]
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2011
Southern California Gas Company [Member]
Undesignated Derivatives
Jun. 30, 2010
Southern California Gas Company [Member]
Undesignated Derivatives
Jun. 30, 2011
Southern California Gas Company [Member]
Undesignated Derivatives
Jun. 30, 2010
Southern California Gas Company [Member]
Undesignated Derivatives
Jun. 30, 2011
Southern California Gas Company [Member]
Undesignated Derivatives
Other Operation And Maintenance [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Southern California Gas Company [Member]
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Southern California Gas Company [Member]
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
Southern California Gas Company [Member]
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Southern California Gas Company [Member]
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
Southern California Gas Company [Member]
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Dec. 31, 2010
Southern California Gas Company [Member]
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Jun. 30, 2011
Southern California Gas Company [Member]
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Dec. 31, 2010
Southern California Gas Company [Member]
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Jun. 30, 2011
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Dec. 31, 2010
Fixed Price Contracts And Other Derivatives, Current Assets [Member]
Jun. 30, 2011
Fixed Price Contracts And Other Derivatives, Noncurrent Assets [Member]
Dec. 31, 2010
Fixed Price Contracts And Other Derivatives, Noncurrent Assets [Member]
Jun. 30, 2011
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Dec. 31, 2010
Fixed Price Contracts And Other Derivatives, Current Liabilities [Member]
Jun. 30, 2011
Fixed Price Contracts And Other Derivatives, Noncurrent Liabilities [Member]
Dec. 31, 2010
Fixed Price Contracts And Other Derivatives, Noncurrent Liabilities [Member]
Jun. 30, 2011
Cash Flow Hedges
Jun. 30, 2010
Cash Flow Hedges
Jun. 30, 2011
Cash Flow Hedges
Jun. 30, 2010
Cash Flow Hedges
Jun. 30, 2011
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Cash Flow Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Cash Flow Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
Cash Flow Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2011
Cash Flow Hedges
Equity Earnings Before Income Tax [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Cash Flow Hedges
Equity Earnings Before Income Tax [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Cash Flow Hedges
Equity Earnings Before Income Tax [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Cash Flow Hedges
Equity Earnings Net Of Income Tax [Member]
Interest Rate Instruments
Jun. 30, 2011
Cash Flow Hedges
Equity Earnings Net Of Income Tax [Member]
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Interest Expense
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Other Income, Net
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2011
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2010
Fair Value Hedges
Interest Rate Instruments
Jun. 30, 2011
Undesignated Derivatives
Jun. 30, 2010
Undesignated Derivatives
Jun. 30, 2011
Undesignated Derivatives
Jun. 30, 2010
Undesignated Derivatives
Jun. 30, 2011
Undesignated Derivatives
Other Income, Net
Interest Rate And Foreign Exchange Instruments [Member]
Jun. 30, 2010
Undesignated Derivatives
Other Income, Net
Interest Rate And Foreign Exchange Instruments [Member]
Jun. 30, 2011
Undesignated Derivatives
Other Income, Net
Interest Rate And Foreign Exchange Instruments [Member]
Jun. 30, 2010
Undesignated Derivatives
Other Income, Net
Interest Rate And Foreign Exchange Instruments [Member]
Jun. 30, 2011
Undesignated Derivatives
Revenues, Sempra Global and Parent [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Undesignated Derivatives
Revenues, Sempra Global and Parent [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Undesignated Derivatives
Revenues, Sempra Global and Parent [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Undesignated Derivatives
Revenues, Sempra Global and Parent [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Undesignated Derivatives
Cost of Natural Gas, Electric Fuel and Purchased Power [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Undesignated Derivatives
Cost of Natural Gas, Electric Fuel and Purchased Power [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2010
Undesignated Derivatives
Cost of Natural Gas, Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Undesignated Derivatives
Cost of Electric Fuel and Purchased Power [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
Undesignated Derivatives
Other Operation And Maintenance [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Undesignated Derivatives
Other Operation And Maintenance [Member]
Commodity Contracts Not Subject To Rate Recovery
Jun. 30, 2011
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2011
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Undesignated Derivatives
Cost of Natural Gas [Member]
Commodity Contracts Subject To Rate Recovery [Member]
Jun. 30, 2010
Cost of Natural Gas, Electric Fuel and Purchased Power [Member]
Commodity Contracts Not Subject To Rate Recovery
Schedule Of Commodity Derivative Volumes [Line Items]                                                                                                                                                                                                                                                  
Commodity derivative volumes, natural gas (in millions of million British thermal units)     $ 45 [1] $ 51 [1] $ 2 [1] $ 1 [1]   $ 9 [1] $ 8 [1] $ 6 [1] $ 7 [1]                                                                                                                                                                                                                            
Commodity derivative volumes, congestion revenue rights (in millions of megawatt hours)     13 [2] 21 [2]                                                                                                                                                                                                                                          
Commodity derivative volumes, electric power (in millions of megawatt hours)           1 [2] 1 [2]                                                                                                                                                                                                                                    
Schedule Of Notional Amounts Of Interest Rate Derivatives [Line Items]                                                                                                                                                                                                                                                  
Notional amount of interest rate derivatives, minimum 15 [3] 215 [3]                   285 [3] 285 [3]                                                                                                                                                                                                                        
Notional amount of interest rate derivatives, maximum 305 [3] 355 [3]                   360 [3] 365 [3]                                                                                                                                                                                                                        
Notional amount of interest rate derivatives                                                                       150                                                                                                                                                                          
Maturities of interest rate derivatives, minimum 2013 [3] 2011 [3]                                                                                                                                                                                                                                              
Maturities of interest rate derivatives, maximum 2019 [3] 2019 [3]                                                                                                                                                                                                                                              
Maturities of interest rate derivatives                       2019 [3] 2019 [3]                                             2011                                                                                                                                                                          
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]                                                                                                                                                                                                                                                  
Interest rate instruments designated as hedging instruments                                                             (17) [4],[5]   (44) [5]                                                   3 [6]     7 [5],[6] 3 [6]     (17) [4],[5]   (45) [5]                                                                                                          
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]                                                                                                                                                                                                                                                  
Interest rate interest rate instruments not designated as hedging instruments                                                               (17) [4],[5]   (41) [5]                                                       9 [6] 9 [6] 23 22 (8) [4] (25) [4] (17) (57)                                                                                                        
Commodity contracts not subject to rate recovery not designated as hedging instruments                                                     1 [6] 1 [6]                                                           1 [6] 1 [6]     56 [6] 59 [6] 23 20 (42) [4] (44) [4] (39) (34)                                                                                                        
Associated offsetting commodity contracts not subject to rate recovery                                                                                                                           (16) [6] (2) [6] (11) (8) 16 [4] 2 [4] 11 8                                                                                                        
Derivative commodity contracts subject to rate recovery not designated as hedging instruments                                                     5 [6] 2 [6] 2   (25) [4] (35) [4] (23) (27)                                               4 [6] 3 [6] (3) [4] (3) [4] 9 [6] 5 [6] 1   (28) [4] (43) [4] (23) (27)                                                                                                        
Associated offsetting commodity contracts subject to rate recovery                                                     (3) [6] (34) [6] (1) (26) 3 [4] 34 [4] 1 26                                               (2) [6] (3) [6] 2 [4] 3 [4] (5) [6] (37) [6] (1) (26) 5 [4] 37 [4] 1 26                                                                                                        
Total derivatives not designated as hedging instruments                                                     3 [6] (31) [6] 1 (26) (22) [4] (18) [4] (22) (42)                                               3 [6] 1 [6] (1) [4]   53 [6] 34 [6] 35 8 (57) [4] (73) [4] (67) (84)                                                                                                        
Derivative Instruments, Gain (Loss) [Line Items]                                                                                                                                                                                                                                                  
Gain (loss) on derivative recognized in earnings                                   (34) 10 (95) (25) [7] (34) [7] (9) 9 (61) 1                             1 1 3 (3) (2) 1 (2) [8] 1 [8] 1 1 2 (1) 1 1 1 1 (1)                                                       2 5 5 7 8 (7) 3 (9) 10 [8] (2) [8] 8 [8] (2) [8] 10 (26) 38 (83) 2 [7] (24) [7] 12 [7] (33) [7] 8 15 14 30 (9) 1 (3) (9) 9 (61) (1) 1 1 1 1 (1) (15)
Amount of pretax gain (loss) on derivative recognized in OCI (effective portion)                           (11) [9]   (11) [9]                                                                                                           (19) (1) (18)   (11) [9]   (11) [9]       (1)     (8) (7)                                                                          
Gain (loss) reclassified from AOCI into earnings (effective portion)                           (1) [9] (2) [9] (2) [9] (4) [9]                                       (1) (2) (2) (3)                                                           (2) 11 (5) 10 (2) [9] (4) [9] (4) [9] (7) [9] 10 [10] 10 [10]   5 7   (1)                                                                          
Reclassification Of Cash Flow Hedge Gain (Loss) [Line Items]                                                                                                                                                                                                                                                  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months (9)                     (4)                                             (1)                                                                                                                                                                            
Derivative Credit Risk Related Contingent Features [Line Items]                                                                                                                                                                                                                                                  
Derivative, Net Liability Position, Aggregate Fair Value 4                                                                                                                                                                                                                                                
Additional Collateral Aggregate Fair Value $ 4                                                                                                                                                                                                                                                
[1] Million British thermal units
[2] Megawatt hours
[3] Includes Otay Mesa VIE. All of SDG&E's interest rate derivatives relate to Otay Mesa VIE.
[4] Included in Current Liabilities: Other for SoCalGas.
[5] Includes Otay Mesa VIE. All of SDG&E's amounts relate to Otay Mesa VIE.
[6] Included in Current Assets: Other for SoCalGas.
[7] Amount for 2010 is related to Otay Mesa VIE. Sempra Energy Consolidated also includes additional instruments.
[8] There has been no hedge ineffectiveness on these swaps. Changes in the fair values of the interest rate swap agreements are exactly offset by changes in the fair value of the underlying long-term debt.
[9] Amounts include Otay Mesa VIE. All of SDG&E's interest rate derivative activity relates to Otay Mesa VIE. There has been a negligible amount of ineffectiveness related to these swaps.
[10] Gains reclassified into earnings due to changes in cash requirements and associated impacts on forecasted interest payments, primarily related to proceeds received from RBS Sempra Commodities. See Note 4.