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COMMITMENTS AND CONTINGENCIES - LONG-TERM PURCHASE COMMITMENT (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current $ 1,317    
Contractual Commitments, Payments Due In Two Years 393    
Contractual Commitments, Payments Due In Three Years 116    
Contractual Commitments, Payments Due In Four Years 112    
Contractual Commitments, Payments Due In Five Years 24    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 47    
Contractual Commitments, Payments Due, Total 2,009    
S D G E Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 177    
Contractual Commitments, Payments Due In Two Years 32    
Contractual Commitments, Payments Due In Three Years 28    
Contractual Commitments, Payments Due In Four Years 27    
Contractual Commitments, Payments Due In Five Years 23    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 45    
Long-term Purchase Commitment, Amount 332    
Contractual Commitment Number of Years 30    
Proceeds From Long Term Transmission Agreement 85    
Natural Gas Contracts [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 404 [1]    
Contractual Commitments, Payments Due In Two Years 243 [1]    
Contractual Commitments, Payments Due In Three Years 230 [1]    
Contractual Commitments, Payments Due In Four Years 224 [1]    
Contractual Commitments, Payments Due In Five Years 206 [1]    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 377 [1]    
Contractual Commitments, Payments Due, Total 1,684 [1]    
Long-term Purchase Commitment, Payments In Period 1,680 1,345 1,991
Natural Gas Contracts [Member] | So Cal Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 183    
Contractual Commitments, Payments Due In Two Years 121    
Contractual Commitments, Payments Due In Three Years 112    
Contractual Commitments, Payments Due In Four Years 108    
Contractual Commitments, Payments Due In Five Years 90    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 157    
Contractual Commitments, Payments Due, Total 771    
Long-term Purchase Commitment, Payments In Period 1,464 1,222 1,810
Natural Gas Transportation Contracts [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 242    
Contractual Commitments, Payments Due In Two Years 239    
Contractual Commitments, Payments Due In Three Years 226    
Contractual Commitments, Payments Due In Four Years 220    
Contractual Commitments, Payments Due In Five Years 202    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 361    
Contractual Commitments, Payments Due, Total 1,490    
Natural Gas Transportation Contracts [Member] | So Cal Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 126    
Contractual Commitments, Payments Due In Two Years 120    
Contractual Commitments, Payments Due In Three Years 111    
Contractual Commitments, Payments Due In Four Years 107    
Contractual Commitments, Payments Due In Five Years 89    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 157    
Contractual Commitments, Payments Due, Total 710    
Natural Gas Supply Contracts [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 162 [1]    
Contractual Commitments, Payments Due In Two Years 4 [1]    
Contractual Commitments, Payments Due In Three Years 4 [1]    
Contractual Commitments, Payments Due In Four Years 4 [1]    
Contractual Commitments, Payments Due In Five Years 4 [1]    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 16 [1]    
Contractual Commitments, Payments Due, Total 194 [1]    
Natural Gas Supply Contracts [Member] | So Cal Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 57    
Contractual Commitments, Payments Due In Two Years 1    
Contractual Commitments, Payments Due In Three Years 1    
Contractual Commitments, Payments Due In Four Years 1    
Contractual Commitments, Payments Due In Five Years 1    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 0    
Contractual Commitments, Payments Due, Total 61    
Purchased Power Contracts [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 1,328    
Contractual Commitments, Payments Due In Two Years 1,473    
Contractual Commitments, Payments Due In Three Years 1,487    
Contractual Commitments, Payments Due In Four Years 1,494    
Contractual Commitments, Payments Due In Five Years 1,483    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 11,826    
Contractual Commitments, Payments Due, Total 19,091 [2]    
Long-term Purchase Commitment, Payments In Period 1,377 1,205 918
Purchased Power Contracts [Member] | S D G E Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 471    
Contractual Commitments, Payments Due In Two Years 543    
Contractual Commitments, Payments Due In Three Years 524    
Contractual Commitments, Payments Due In Four Years 517    
Contractual Commitments, Payments Due In Five Years 488    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 6,349    
Contractual Commitments, Payments Due, Total 8,892 [2]    
Long-term Purchase Commitment, Payments In Period 570 381 346
Purchased Power Contracts [Member] | Sempra Renewables Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Guarantee Obligations Maximum Exposure 165    
Guarantee Obligations Current Carrying Value 2    
Debt Service Operations [Member] | Sempra Renewables Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Guarantee Obligations Maximum Exposure 328    
Guarantee Obligations Current Carrying Value 17    
Sunrise Powerlink Construction [Member] | S D G E Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitment Annual Escalation Percentage 2.00%    
Contractual Commitment Number of Years 58    
Contractual Commitment Future Annual Payment Amount 3    
Contractual Commitment Present Value Future Payments, Regulatory Asset 115    
Contractual Commitment Future Payments, Liability 115    
East County Substation [Member] | S D G E Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Long-term Purchase Commitment, Payments In Period 87    
Liquefied Natural Gas Contracts [Member]
      
Long-term Purchase Commitment [Line Items]      
Long Term Purchase Commitment Estimated Annual Escalation After 2023 1.00%    
Liquefied Natural Gas Contracts [Member] | Sempra Natural Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 670    
Contractual Commitments, Payments Due In Two Years 662    
Contractual Commitments, Payments Due In Three Years 654    
Contractual Commitments, Payments Due In Four Years 658    
Contractual Commitments, Payments Due In Five Years 678    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 8,300    
Nuclear Plant Maintenance [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
      
Long-term Purchase Commitment [Line Items]      
Long-term Purchase Commitment, Amount 132    
Natural Gas Infrastructure Construction [Member] | S D G E Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Long-term Purchase Commitment, Amount 113    
Natural Gas Infrastructure Construction [Member] | So Cal Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 190    
Contractual Commitments, Payments Due In Two Years 84    
Contractual Commitments, Payments Due In Three Years 84    
Contractual Commitments, Payments Due In Four Years 84    
Contractual Commitments, Payments Due, Total 442    
Long-term Contracts [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
      
Long-term Purchase Commitment [Line Items]      
Purchase Commitment Component Percentage 31.00%    
Other Owned Generation [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
      
Long-term Purchase Commitment [Line Items]      
Purchase Commitment Component Percentage 55.00%    
Spot Market Purchases [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
      
Long-term Purchase Commitment [Line Items]      
Purchase Commitment Component Percentage 14.00%    
Renewable Energy Contracts Expiring Through 2039 [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
      
Long-term Purchase Commitment [Line Items]      
Purchase Commitment Component Percentage 25.40%    
Luz del Sur Hydroelectric Power Plant [Member] | Sempra South American Utilities Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Total 15    
Sempra South American Utilities Construction [Member] | Sempra South American Utilities Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 27    
Contractual Commitments, Payments Due, Total 27    
Sempra Renewables Construction [Member] | Sempra Renewables Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 524    
Contractual Commitments, Payments Due In Two Years 41    
Contractual Commitments, Payments Due In Three Years 1    
Contractual Commitments, Payments Due In Four Years 1    
Contractual Commitments, Payments Due In Five Years 1    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 1    
Contractual Commitments, Payments Due, Total 569    
Sempra Rockies Marketing [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 14    
Contractual Commitments, Payments Due In Two Years 14    
Contractual Commitments, Payments Due In Three Years 14    
Contractual Commitments, Payments Due In Four Years 14    
Contractual Commitments, Payments Due In Five Years 33    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 50    
Operations And Maintenance Mesquite Power [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 2    
Contractual Commitments, Payments Due In Two Years 2    
Contractual Commitments, Payments Due In Three Years 2    
Contractual Commitments, Payments Due In Four Years 2    
Contractual Commitments, Payments Due In Five Years 2    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 25    
Contractual Commitments, Payments Due, Total 35    
Sempra Natural Gas Construction [Member] | Sempra Natural Gas Segment [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 8    
Contractual Commitments, Payments Due, Total 8    
Energia Sierra Juarez Wind And Sasabe Guaymas Projects [Member]
      
Long-term Purchase Commitment [Line Items]      
Contractual Commitments, Payments Due, Current 391    
Contractual Commitments, Payments Due In Two Years 236    
Contractual Commitments, Payments Due In Three Years 3    
Contractual Commitments, Payments Due In Four Years 0    
Contractual Commitments, Payments Due In Five Years 0    
Unrecorded Unconditional Purchase Obligation, Due after Five Years 1    
Contractual Commitments, Payments Due, Total $ 631    
[1] Excludes amounts related to LNG purchase agreements as discussed below.
[2] Excludes purchase agreements accounted for as capital leases and amounts related to Otay Mesa VIE, as it is consolidated by Sempra Energy and SDG&E.