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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2011
Schedule Of Commodity Derivative Volumes [Abstract]  
Schedule Of Commodity Derivative Volumes
    
   December 31,
Business Unit and Commodity20112010
California Utilities:   
SDG&E:   
 Natural gas35 million MMBtu51 million MMBtu(1)
 Congestion revenue rights19 million MWh21 million MWh(2)
      
Energy-Related Businesses:   
Sempra Natural Gas:   
Electric power5 million MWh1 million MWh 
Natural gas20 million MMBtu15 million MMBtu 
Sempra Mexico - natural gas1 million MMBtu - 
(1)Million British thermal units 
(2)Megawatt hours 
Schedule Of Notional Amounts Of Interest Rate Derivatives [Abstract]  
Schedule Of Notional Amounts of Interest Rate Derivatives Table
  December 31, 2011December 31, 2010
(Dollars in millions)Notional DebtMaturitiesNotional DebtMaturities
Sempra Energy Consolidated(1)$15-3052013-2019$215-3552011-2019
SDG&E(1) 285-3552019 285-3652019
SoCalGas  - - 1502011
(1)Includes Otay Mesa VIE. All of SDG&E’s interest rate derivatives relate to Otay Mesa VIE.
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Abstract]  
Schedule Of Derivative Instruments on the Consolidated Balance Sheets
DERIVATIVE INSTRUMENTS ON THE CONSOLIDATED BALANCE SHEETS
(Dollars in millions)
  December 31, 2011
         Deferred
         credits
   Current   Current and other
   assets:   liabilities: liabilities:
   Fixed-price Investments Fixed-price Fixed-price
   contracts and other contracts contracts
   and other assets: and other and other
Derivatives designated as hedging instruments  derivatives(1) Sundry derivatives(2) derivatives
Sempra Energy Consolidated:        
 Interest rate instruments(3)$ 5$ 11$ (17)$ (65)
SDG&E:        
 Interest rate instruments(3)$ ―$ ―$ (16)$ (65)
          
Derivatives not designated as hedging instruments        
Sempra Energy Consolidated:        
 Interest rate instruments$ 8$ 41$ (7)$ (36)
 Commodity contracts not subject to rate recovery  156  72  (148)  (94)
  Associated offsetting commodity contracts  (120)  (68)  120  68
 Commodity contracts subject to rate recovery  28  8  (62)  (24)
  Associated offsetting commodity contracts  (10)  (2)  10  2
 Total$ 62$ 51$ (87)$ (84)
SDG&E:        
 Commodity contracts subject to rate recovery$ 22$ 8$ (55)$ (24)
  Associated offsetting commodity contracts  (5)  (2)  5  2
 Total$ 17$ 6$ (50)$ (22)
SoCalGas:        
 Commodity contracts subject to rate recovery$ 6$ ―$ (7)$ ―
  Associated offsetting commodity contracts  (5)  ―  5  ―
 Total$ 1$ ―$ (2)$ ―
(1)Included in Current Assets: Other for SoCalGas.
(2)Included in Current Liabilities: Other for SoCalGas.
(3)Includes Otay Mesa VIE. All of SDG&E’s amounts relate to Otay Mesa VIE.

DERIVATIVE INSTRUMENTS ON THE CONSOLIDATED BALANCE SHEETS (Continued)
(Dollars in millions)
  December 31, 2010
         Deferred
         credits
   Current   Current and other
   assets:   liabilities: liabilities:
   Fixed-price Investments Fixed-price Fixed-price
   contracts and other contracts contracts
   and other assets: and other and other
Derivatives designated as hedging instruments  derivatives(1) Sundry derivatives(2) derivatives
Sempra Energy Consolidated:        
 Interest rate instrument$ 3$ ―$ ―$ ―
SoCalGas:        
 Interest rate instrument$ 3$ ―$ ―$ ―
          
Derivatives not designated as hedging instruments        
Sempra Energy Consolidated:        
 Interest rate instruments(3)$ 9$ 22$ (25)$ (57)
 Commodity contracts not subject to rate recovery  59  20  (44)  (34)
  Associated offsetting commodity contracts  (2)  (8)  2  8
 Commodity contracts subject to rate recovery  5  ―  (43)  (27)
  Associated offsetting commodity contracts  (37)  (26)  37  26
 Total$ 34$ 8$ (73)$ (84)
SDG&E:        
 Interest rate instruments(3)$ ―$ ―$ (17)$ (41)
 Commodity contracts not subject to rate recovery  1  ―  ―  ―
 Commodity contracts subject to rate recovery  2  ―  (35)  (27)
  Associated offsetting commodity contracts  (34)  (26)  34  26
 Total$ (31)$ (26)$ (18)$ (42)
SoCalGas:        
 Commodity contracts not subject to rate recovery$ 1$ ―$ ―$ ―
 Commodity contracts subject to rate recovery  3  ―  (3)  ―
  Associated offsetting commodity contracts  (3)  ―  3  ―
 Total$ 1$ ―$ ―$ ―
(1)Included in Current Assets: Other for SoCalGas.
(2)Included in Current Liabilities: Other for SoCalGas.
(3)Includes Otay Mesa VIE. All of SDG&E’s amounts relate to Otay Mesa VIE.
Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Abstract]  
Schedule Of Fair Value Hedge Impact on the Consolidated Statements of Operations
FAIR VALUE HEDGE IMPACT ON THE CONSOLIDATED STATEMENTS OF OPERATIONS
(Dollars in millions)
   Gain (loss) on derivatives recognized in earnings
   Years ended December 31,
 Location201120102009
Sempra Energy Consolidated:       
 Interest rate instrumentsInterest Expense$ 9$ 10$ 19
 Interest rate instrumentsOther Income, Net  13  (11)  (11)
 Total(1) $ 22$ (1)$ 8
SoCalGas:       
 Interest rate instrumentInterest Expense$ 1$ 6$ 6
 Interest rate instrumentOther Income, Net  (3)  (4)  (2)
 Total(1) $ (2)$ 2$ 4
(1)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.
Schedule Of Cash Flow Hedges Impact On Statements Of Operations [Abstract]  
Schedule Of Cash Flow Hedge Impact on the Consolidated Statements Of Operations
CASH FLOW HEDGE IMPACT ON THE CONSOLIDATED STATEMENTS OF OPERATIONS
(Dollars in millions)
  Pretax gain (loss) recognized in OCI   Gain (loss) reclassified from AOCI into earnings
  (effective portion)  (effective portion)
  Years ended December 31,  Years ended December 31,
  2011 2010 2009 Location 2011 2010 2009
Sempra Energy Consolidated:              
 Interest rate instruments(1)$ (42)$ ―$ ― Interest Expense$ (8)$ (12)$ (2)
 Interest rate instruments  ―  ―  13 Other Income, Net(2)  ―  10  3
         Equity Earnings, Net of Income      
 Interest rate instruments  (32)  2  ―  Tax  (5)  (1)  ―
 Commodity contracts not subject       Revenues: Energy-Related      
  to rate recovery  ―  ―  17  Businesses  ―  ―  22
 Commodity contracts not subject       Cost of Natural Gas, Electric      
  to rate recovery  ―  ―  ―  Fuel and Purchased Power  ―  ―  (16)
 Commodity contracts not subject              
  to rate recovery  ―  ―  1 Other Operation and Maintenance  ―  ―  2
 Commodity contracts not subject       Equity Earnings (Losses): RBS      
  to rate recovery  ―  1  37  Sempra Commodities LLP  ―  21  7
 Total$ (74)$ 3$ 68  $ (13)$ 18$ 16
SDG&E:              
 Interest rate instruments(1)$ (40)$ ―$ ― Interest Expense$ (5)$ (7)$ 3
 Commodity contracts not subject              
  to rate recovery  ―  ―  ― Operation and Maintenance  ―  ―  1
 Total$ (40)$ ―$ ―  $ (5)$ (7)$ 4
SoCalGas:              
 Interest rate instrument$ ―$ ―$ ― Interest Expense$ (3)$ (5)$ (4)
 Commodity contracts not subject              
  to rate recovery  ―  ―  1 Operation and Maintenance  ―  ―  1
 Total$ ―$ ―$ 1  $ (3)$ (5)$ (3)
(1)Amounts include Otay Mesa VIE. All of SDG&E’s 2010 and 2011 interest rate derivative activity relates to Otay Mesa VIE. There has been a negligible amount of ineffectiveness related to these swaps.
(2)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.
Schedule Of Undesignated Derivative Instruments Impact On Statements Of Operations [Abstract]  
Schedule Of Undesignated Derivative Impact on the Consolidated Statements of Operations
UNDESIGNATED DERIVATIVE IMPACT ON THE CONSOLIDATED STATEMENTS OF OPERATIONS
(Dollars in millions)
   Gain (loss) on derivatives recognized in earnings
   Years ended December 31,
  Location201120102009
Sempra Energy Consolidated:       
 Interest rate and foreign       
  exchange instruments(1)Other Income, Net$ (14)$ (34)$ 30
 Commodity contracts not subjectRevenues: Energy-Related      
  to rate recovery Businesses  30  47  47
 Commodity contracts not subjectCost of Natural Gas, Electric      
  to rate recovery Fuel and Purchased Power  1  (29)  (39)
 Commodity contracts not subject       
  to rate recoveryOther Operation and Maintenance  1  2  ―
 Commodity contracts subjectCost of Electric Fuel       
  to rate recovery and Purchased Power  (14)  (102)  (54)
 Commodity contracts subject       
  to rate recoveryCost of Natural Gas  (2)  (9)  (10)
 Total $ 2$ (125)$ (26)
SDG&E:       
 Interest rate instruments(1)Other Income, Net$ (1)$ (34)$ 27
 Commodity contracts not subject       
  to rate recoveryOperation and Maintenance  ―  1  ―
 Commodity contracts subjectCost of Electric Fuel      
  to rate recovery and Purchased Power  (14)  (102)  (54)
 Total $ (15)$ (135)$ (27)
SoCalGas:       
 Commodity contracts not subject       
  to rate recoveryOperation and Maintenance$ 1$ 1$ ―
 Commodity contracts subject       
  to rate recoveryCost of Natural Gas  (2)  (5)  (5)
 Total $ (1)$ (4)$ (5)
(1)Amounts are related to Otay Mesa VIE. Sempra Energy Consolidated also includes additional instruments.