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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2013
Schedule Of Recurring Fair Value Assets Liabilities [Abstract]  
Schedule Of Recurring Fair Value Measures
RECURRING FAIR VALUE MEASURES ― SEMPRA ENERGY CONSOLIDATED
(Dollars in millions)
  At fair value as of December 31, 2013
   Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Nuclear decommissioning trusts          
Equity securities$ 614$$$$ 614
Debt securities:          
Debt securities issued by the U.S. Treasury and other          
U.S. government corporations and agencies  59  58    117
Municipal bonds    111    111
Other securities    153    153
Total debt securities  59  322    381
Total nuclear decommissioning trusts(2)  673  322    995
Interest rate instruments   56    56
Commodity contracts subject to rate recovery  2  1  99  31  133
Commodity contracts not subject to rate recovery  1  5   17  23
Total$ 676$ 384$ 99$ 48$ 1,207
Liabilities:          
Interest rate and foreign exchange instruments $$ 117$$$ 117
Commodity contracts subject to rate recovery   13    13
Commodity contracts not subject to rate recovery  4  8   (5)  7
Total$ 4$ 138$$ (5)$ 137
            
 At fair value as of December 31, 2012
  Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Nuclear decommissioning trusts          
Equity securities$ 539$$$$ 539
Debt securities:          
Debt securities issued by the U.S. Treasury and other           
U.S. government corporations and agencies  87  69    156
Municipal bonds   63    63
Other securities   130    130
Total debt securities  87  262    349
Total nuclear decommissioning trusts(2)  626  262    888
Interest rate instruments   68    68
Commodity contracts subject to rate recovery    61  13  74
Commodity contracts not subject to rate recovery  13  8   22  43
Investments  1     1
Total$ 640$ 338$ 61$ 35$ 1,074
Liabilities:          
Interest rate instruments$$ 126$$$ 126
Commodity contracts subject to rate recovery  23  9   (23)  9
Commodity contracts not subject to rate recovery  6  23   (11)  18
Total$ 29$ 158$$ (34)$ 153
(1)Includes the effect of the contractual ability to settle contracts under master netting agreements and with cash collateral, as well as cash collateral not offset.
(2)Excludes cash balances and cash equivalents.          

RECURRING FAIR VALUE MEASURES ― SDG&E
(Dollars in millions)
 At fair value as of December 31, 2013
  Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Nuclear decommissioning trusts          
Equity securities$ 614$$$$ 614
Debt securities:          
Debt securities issued by the U.S. Treasury and other          
U.S. government corporations and agencies  59  58    117
Municipal bonds    111    111
Other securities    153    153
Total debt securities  59  322    381
Total nuclear decommissioning trusts(2)  673  322    995
Commodity contracts subject to rate recovery  1  1  99  29  130
Commodity contracts not subject to rate recovery     1  1
Total$ 674$ 323$ 99$ 30$ 1,126
           
Liabilities:          
Interest rate instruments$$ 55$$$ 55
Commodity contracts subject to rate recovery   12    12
Total$$ 67$$$ 67
           
 At fair value as of December 31, 2012
  Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Nuclear decommissioning trusts          
Equity securities$ 539$$$$ 539
Debt securities:          
Debt securities issued by the U.S. Treasury and other          
U.S. government corporations and agencies  87  69    156
Municipal bonds    63    63
Other securities    130    130
Total debt securities  87  262    349
Total nuclear decommissioning trusts(2)  626  262    888
Commodity contracts subject to rate recovery    61  12  73
Commodity contracts not subject to rate recovery     1  1
Total$ 626$ 262$ 61$ 13$ 962
           
Liabilities:          
Interest rate instruments$$ 81$$$ 81
Commodity contracts subject to rate recovery  23  8   (23)  8
Total$ 23$ 89$$ (23)$ 89
(1)Includes the effect of the contractual ability to settle contracts under master netting agreements and with cash collateral, as well as cash collateral not offset.
(2)Excludes cash balances and cash equivalents.          

RECURRING FAIR VALUE MEASURES ― SOCALGAS
(Dollars in millions)
  At fair value as of December 31, 2013
   Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Commodity contracts subject to rate recovery$ 1$$$ 2$ 3
Commodity contracts not subject to rate recovery     2  2
Total$ 1$$$ 4$ 5
            
Liabilities:          
Commodity contracts subject to rate recovery$$ 1$$$ 1
Total$$ 1$$$ 1
            
  At fair value as of December 31, 2012
   Level 1 Level 2 Level 3 Netting(1) Total
Assets:          
Commodity contracts subject to rate recovery$$$$ 1$ 1
Commodity contracts not subject to rate recovery  1    2  3
Total$ 1$$$ 3$ 4
            
Liabilities:          
Commodity contracts subject to rate recovery$$ 1$$$ 1
Total$$ 1$$$ 1
(1)Includes the effect of the contractual ability to settle contracts under master netting agreements and with cash collateral, as well as cash collateral not offset.
Schedule Of Recurring Fair Value Assets Liabilities Unobservable Input Reconciliation [Abstract]  
Schedule Of Recurring Fair Value Measures Level 3 Rollforward
LEVEL 3 RECONCILIATIONS
(Dollars in millions)
 Years ended December 31,
 201320122011
Balance as of January 1$ 61$ 23$ 2
Realized and unrealized gains  11  31  32
Allocated transmission instruments  51  58  7
Settlements  (24)  (51)  (18)
Balance as of December 31$ 99$ 61$ 23
Change in unrealized gains or losses relating to       
instruments still held at December 31$ 11$ 17$ 17
Schedule Of Fair Value Of Financial Instruments [Abstract]  
Schedule Of Fair Value of Financial Instruments
FAIR VALUE OF FINANCIAL INSTRUMENTS
(Dollars in millions)
  December 31, 2013
  Carrying Fair Value
  Amount Level 1Level 2Level 3Total
Sempra Energy Consolidated:           
Total long-term debt(1)$ 12,022 $$ 11,925$ 751$ 12,676
Preferred stock of subsidiary  20    20   20
SDG&E:           
Total long-term debt(2)$ 4,386 $$ 4,226$ 335$ 4,561
SoCalGas:           
Total long-term debt(3)$ 1,413 $$ 1,469$$ 1,469
Preferred stock  22    22   22
             
  December 31, 2012
  Carrying Fair Value
  Amount Level 1Level 2Level 3Total
Sempra Energy Consolidated:           
Investments in affordable housing partnerships(4)$ 12 $$$ 36$ 36
Total long-term debt(1)  11,873    12,287  956  13,243
Preferred stock of subsidiaries  99    107   107
SDG&E:           
Total long-term debt(2)$ 4,135 $$ 4,243$ 345$ 4,588
Contingently redeemable preferred stock(5)  79    85   85
SoCalGas:           
Total long-term debt(3)$ 1,413 $$ 1,599$$ 1,599
Preferred stock  22    24   24
(1)Before reductions for unamortized discount (net of premium) of $17 million and $16 million at December 31, 2013 and 2012, respectively, and excluding build-to-suit and capital leases of $195 million and capital leases of $189 million at December 31, 2013 and 2012, respectively, and commercial paper classified as long-term debt of $200 million and $300 million at December 31, 2013 and 2012, respectively. We discuss our long-term debt in Note 5.
(2)Before reductions for unamortized discount of $11 million and $12 million at December 31, 2013 and 2012, respectively, and excluding capital leases of $179 million and $185 million at December 31, 2013, respectively.
(3)Before reductions for unamortized discount of $4 million at both December 31, 2013 and 2012 and excluding capital leases of $2 million and $4 million at December 31, 2013 and 2012, respectively.
(4)Investments in affordable housing partnerships at Parent and Other. At December 31, 2013, the carrying amount and fair value of these investments were negligible.
(5)On October 15, 2013, SDG&E redeemed all outstanding shares of its contingently redeemable preferred stock for $82 million. We discuss the redemption in Note 11.
Schedule Of Cash Collateral Not Offset With Derivative Instruments [Abstract]  
Schedule Of Fair Value of Cash Collateral Receivables Not Offset on the Consolidated Balance Sheets
 December 31,
(Dollars in millions)20132012
Sempra Energy Consolidated$ 48$ 35
SDG&E  30  13
SoCalGas  4  3
Schedule Of Non Recurring Fair Value Measures [Abstract]  
Schedule Of Non Recurring Fair Value Measures
NON-RECURRING FAIR VALUE MEASURES ― SEMPRA ENERGY CONSOLIDATED
(Dollars in millions)
    % of  
 Estimated FairFair Value  
 Fair ValueMeasure- Range of
 ValueValuation TechniqueHierarchymentInputs Used to Develop MeasurementInputs
Investment in      
Rockies Express$369(1)Market approachLevel 267%Equity sale offer price100%
       
       
  Probability weightedLevel 333%Combined transportation rate assumption(2)6% - 78%
  discounted cash flow  Counterparty credit risk on existing contractsLow
     Operation and maintenance escalation rate0% - 1%
     Forecasted interest rate on debt to be refinanced5% - 10%
     Discount rate8% - 10%
Investment in       
RBS Sempra      
Commodities$126(3)Discounted cash flowLevel 3100%Future cash distributions90% - 110%
(1)At measurement date of September 30, 2012. At December 31, 2013, our investment in Rockies Express had a carrying value of $329 million, reflecting subsequent equity method activity to record distributions and earnings.
(2)Transportation rate beyond existing contract terms as a percentage of current mean REX rates.
(3)At measurement date of September 30, 2011. At December 31, 2013, our investment in RBS Sempra Commodities had a carrying value of $73 million, reflecting subsequent equity method activity to record distributions and losses.