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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)
3 Months Ended
Jun. 30, 2011
Derivative Financial Instruments (Tables) [Abstract]  
Commodity Derivative Volumes Table
      
Business Unit and CommodityJune 30, 2011December 31, 2010 
Sempra Utilities:   
SDG&E:   
Natural gas45 million MMBtu51 million MMBtu(1)
Congestion revenue rights13 million MWh21 million MWh(2)
SoCalGas - natural gas2 million MMBtu 
      
Energy-Related Businesses:   
Sempra Generation - electric power1 million MWh1 million MWh 
Sempra Generation - natural gas1 million MMBtu 
Sempra Pipelines & Storage - natural gas9 million MMBtu8 million MMBtu 
Sempra LNG - natural gas6 million MMBtu7 million MMBtu 
(1)Million British thermal units  
(2)Megawatt hours  
Notional Amounts of Interest Rate Derivatives Table
  June 30, 2011December 31, 2010
(Dollars in millions)Notional DebtMaturitiesNotional DebtMaturities
Sempra Energy Consolidated(1)$15-3052013-2019$215-3552011-2019
SDG&E(1) 285-3602019 285-3652019
SoCalGas  1502011
(1)Includes Otay Mesa VIE. All of SDG&E's interest rate derivatives relate to Otay Mesa VIE.
Derivative Instruments on the Condensed Consolidated Balance Sheets Table
DERIVATIVE INSTRUMENTS ON THE CONDENSED CONSOLIDATED BALANCE SHEETS
(Dollars in millions)
  June 30, 2011
         Deferred
         credits
   Current   Current and other
   assets:   liabilities: liabilities:
   Fixed-price Investments Fixed-price Fixed-price
   contracts and other contracts contracts
   and other assets: and other and other
Derivatives designated as hedging instruments  derivatives(1) Sundry derivatives(2) derivatives
Sempra Energy Consolidated:        
Interest rate instruments(3)$ 7$$ (17)$ (45)
SDG&E:        
Interest rate instruments(3)$$$ (17)$ (44)
          
Derivatives not designated as hedging instruments        
Sempra Energy Consolidated:        
Interest rate instruments$ 9$ 23$ (8)$ (17)
Commodity contracts not subject to rate recovery  56  23  (42)  (39)
Associated offsetting commodity contracts  (16)  (11)  16  11
Commodity contracts subject to rate recovery  9  1  (28)  (23)
Associated offsetting commodity contracts  (5)  (1)  5  1
Total$ 53$ 35$ (57)$ (67)
SDG&E:        
Commodity contracts not subject to rate recovery$ 1$$$
Commodity contracts subject to rate recovery  5  2  (25)  (23)
Associated offsetting commodity contracts  (3)  (1)  3  1
Total$ 3$ 1$ (22)$ (22)
SoCalGas:        
Commodity contracts not subject to rate recovery$ 1$$$
Commodity contracts subject to rate recovery  4   (3) 
Associated offsetting commodity contracts  (2)   2 
Total$ 3$$ (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.
          
DERIVATIVE INSTRUMENTS ON THE CONDENSED CONSOLIDATED BALANCE SHEETS
(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 instruments$ 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$$$
(1)Included in Current Assets: Other for SoCalGas.        
(2)Included in Current Liabilities: Other for SoCalGas.        
(3)Includes Otay Mesa VIE. All of SDG&E's amounts relate to Otay Mesa VIE.
Fair Value Hedge Impact on the Condensed Consolidated Statements of Operations Table
FAIR VALUE HEDGE IMPACT ON THE CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(Dollars in millions)    
   Gain (loss) on derivatives recognized in earnings
   Three months ended June 30,Six months ended June 30,
 Location2011201020112010
Sempra Energy Consolidated:        
Interest rate instrumentsInterest Expense$ 2$ 5$ 5$ 7
Interest rate instrumentsOther Income, Net  8  (7)  3  (9)
Total(1) $ 10$ (2)$ 8$ (2)
SoCalGas:         
Interest rate instrumentInterest Expense$$ 1$ 1$ 3
Interest rate instrumentOther Income, Net    (3)  (2)
Total(1) $$ 1$ (2)$ 1
(1)There has been no hedge ineffectiveness on these swaps. Changes in the fair values of the interest rate swap agreements are exactly offset by changes in the fair value of the underlying long-term debt.
Cash Flow Hedge Impact on the Condensed Consolidated Statements of Operations Table
CASH FLOW HEDGE IMPACT ON THE CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS  
(Dollars in millions)   
  Pretax gain (loss) recognized  Gain (loss) reclassified from AOCI
  in OCI (effective portion)  into earnings (effective portion)
  Three months ended June 30,  Three months ended June 30,
 20112010 Location20112010
Sempra Energy Consolidated:          
Interest rate instruments(1)$ (11)$ Interest Expense$ (2)$ (4)
Interest rate instruments   Other Income, Net(2)   10
Interest rate instruments  (8)  Equity Earnings, Net of Income Tax  
Commodity contracts not subject           
to rate recovery   (1) Equity Earnings, Before Income Tax   5
Total$ (19)$ (1)  $ (2)$ 11
SDG&E:          
Interest rate instruments(1)$ (11)$ Interest Expense$ (1)$ (2)
SoCalGas:          
Interest rate instruments$$ Interest Expense$ (1)$ (2)
  Six months ended June 30,  Six months ended June 30,
 20112010 Location20112010
Sempra Energy Consolidated:          
Interest rate instruments(1)$ (11)$ Interest Expense$ (4)$ (7)
Interest rate instruments   Other Income, Net(2)   10
Interest rate instruments  (7)  Equity Earnings, Net of Income Tax  (1) 
Commodity contracts not subject           
to rate recovery   Equity Earnings, Before Income Tax   7
Total$ (18)$  $ (5)$ 10
SDG&E:          
Interest rate instruments(1)$ (11)$ Interest Expense$ (2)$ (4)
SoCalGas:          
Interest rate instruments$$ Interest Expense$ (2)$ (3)
(1)Amounts include Otay Mesa VIE. All of SDG&E's interest rate derivative activity relates to Otay Mesa VIE. There has been a negligible amount of ineffectiveness related to these swaps.
(2)Gains reclassified into earnings due to changes in cash requirements and associated impacts on forecasted interest payments, primarily related to proceeds received from RBS Sempra Commodities. See Note 4.
Undesignated Derivative Impact on the Condensed Consolidated Statements of Operations Table
UNDESIGNATED DERIVATIVE IMPACT ON THE CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS 
(Dollars in millions)    
   Gain (loss) on derivatives recognized in earnings
   Three months ended June 30,Six months ended June 30,
 Location2011201020112010
Sempra Energy Consolidated:         
Interest rate and foreign exchange         
instruments(1)Other Income, Net$ 2$ (24)$ 12$ (33)
Commodity contracts not subjectRevenues: Energy-Related        
to rate recovery Businesses  8  15  14  30
Commodity contracts not subjectCost of Natural Gas, Electric        
to rate recovery Fuel and Purchased Power   (9)  1  (15)
Commodity contracts not subject         
to rate recoveryOther Operation and Maintenance  (1)   1 
Commodity contracts subjectCost of Electric Fuel        
to rate recovery and Purchased Power   (9)  9  (61)
Commodity contracts subject         
to rate recoveryCost of Natural Gas  1  1  1  (1)
Commodity contracts subjectCost of Natural Gas, Electric        
to rate recovery Fuel and Purchased Power     (3)
Total $ 10$ (26)$ 38$ (83)
SDG&E:         
Interest rate instruments(1)Other Income (Expense), Net$$ (25)$$ (34)
Commodity contracts not subject         
to rate recoveryOperation and Maintenance    1 
Commodity contracts subjectCost of Electric Fuel        
to rate recovery and Purchased Power   (9)  9  (61)
Total $$ (34)$ 10$ (95)
SoCalGas:         
Commodity contracts not subject         
to rate recoveryOperation and Maintenance$$$ 1$
Commodity contracts subject         
to rate recoveryCost of Natural Gas  1  1  1  (1)
Total $ 1$ 1$ 2$ (1)
(1)Amount for 2010 is related to Otay Mesa VIE. Sempra Energy Consolidated also includes additional instruments.