v2.4.1.9

SEGMENT INFORMATION (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | $ 2,682 us-gaap_Revenues |  | $ 2,795 us-gaap_Revenues |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 100.00%sre_SegmentReportingInformationPercentageOfRevenues |  | 100.00%sre_SegmentReportingInformationPercentageOfRevenues |  |  |
Segment reporting information, Interest Expense | 134 us-gaap_InterestExpense |  | 136 us-gaap_InterestExpense |  |  |
Segment reporting information, Interest Income | 7 us-gaap_InvestmentIncomeInterest |  | 4 us-gaap_InvestmentIncomeInterest |  |  |
Segment reporting information, Depreciation and Amortization | 303 us-gaap_DepreciationDepletionAndAmortization |  | 286 us-gaap_DepreciationDepletionAndAmortization |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 100.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization |  | 100.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 163 us-gaap_IncomeTaxExpenseBenefit |  | 127 us-gaap_IncomeTaxExpenseBenefit |  |  |
Equity Earnings (Losses) Recorded Before Tax | 19 us-gaap_IncomeLossFromEquityMethodInvestments |  | 17 us-gaap_IncomeLossFromEquityMethodInvestments |  |  |
Segment reporting information, Equity Earnings (Losses) Recorded Net of Tax | 15 sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax |  | 6 sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax |  |  |
Segment reporting information, Earnings (Losses) | 437 sre_SegmentReportingInformationEarningsLosses |  | 247 sre_SegmentReportingInformationEarningsLosses |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 100.00%sre_SegmentReportingInformationPercentageOfEarningsLosses |  | 100.00%sre_SegmentReportingInformationPercentageOfEarningsLosses |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 780 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment |  | 801 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 100.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment |  | 100.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment |  |  |
Segment reporting information, Assets | 39,551 us-gaap_Assets |  |  |  | 39,732 us-gaap_Assets | [1]
Segment reporting information, Percentage of Consolidated Assets | 100.00%sre_SegmentReportingInformationPercentageOfAssets |  |  |  | 100.00%sre_SegmentReportingInformationPercentageOfAssets |
Segment Reporting Information Investments In Equity Method Investees | 2,772 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees |  |  |  | 2,848 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees |
S D G E Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 966 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 987 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 36.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 35.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Interest Expense | 52 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 50 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Depreciation | 145 us-gaap_Depreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 130 us-gaap_Depreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation | 48.00%sre_Segmentreportinginformationpercentageofdepreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 45.00%sre_Segmentreportinginformationpercentageofdepreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 88 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 83 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 147 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 99 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 34.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 40.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 355 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 294 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 46.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 37.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
Segment reporting information, Assets | 16,485 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |  | 16,296 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 42.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |  | 41.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |
Segment Reporting Information, Intersegment Revenues | 2 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  | 3 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SDGESegmentMember |  |  |
So Cal Gas Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 1,048 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 1,085 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 39.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 39.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Interest Expense | 19 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 17 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Depreciation | 113 us-gaap_Depreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 105 us-gaap_Depreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation | 37.00%sre_Segmentreportinginformationpercentageofdepreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 37.00%sre_Segmentreportinginformationpercentageofdepreciation / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 95 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 38 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 214 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember | [2] | 78 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember | [2] |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 49.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 32.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 315 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 260 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 40.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 33.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Segment reporting information, Assets | 10,563 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |  | 10,461 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 27.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |  | 26.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |
Segment Reporting Information, Intersegment Revenues | 19 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  | 18 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SoCalGasSegmentMember |  |  |
Sempra South American Utilities Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 389 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 378 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 15.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 14.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Interest Expense | 5 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 8 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Interest Income | 4 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 3 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Depreciation and Amortization | 13 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 14 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 4.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 5.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 16 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 15 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Equity Earnings (Losses) Recorded Net of Tax | (1)sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | (2)sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 41 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 35 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 9.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 14.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 31 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 32 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 4.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  | 4.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |
Segment reporting information, Assets | 3,350 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |  | 3,379 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 8.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |  | 9.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |
Segment Reporting Information Investments In Equity Method Investees | (8)sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |  |  |  | (8)sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraSouthAmericanUtilitiesSegmentMember |
Sempra Mexico Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 163 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 201 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 6.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 7.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Interest Expense | 5 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 4 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Interest Income | 2 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 0 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Depreciation and Amortization | 17 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 16 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 6.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 6.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 8 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 12 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Equity Earnings (Losses) Recorded Net of Tax | 16 sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 8 sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 47 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 42 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 11.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 17.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 55 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 75 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 7.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 9.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Segment reporting information, Assets | 3,502 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |  | 3,488 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 9.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |  | 9.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |
Segment Reporting Information Investments In Equity Method Investees | 439 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |  | 434 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |
Segment Reporting Information, Intersegment Revenues | 25 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  | 22 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraMexicoSegmentMember |  |  |
Sempra Renewables Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 8 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 6 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 0.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 0.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Interest Expense | 1 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 0 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Depreciation and Amortization | 2 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 1.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 0.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | (17)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | (6)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Equity Earnings (Losses) Recorded Before Tax | 2 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 2 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 13 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 28 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 3.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 11.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 3 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 99 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 1.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  | 12.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |
Segment reporting information, Assets | 1,277 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |  | 1,338 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 3.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |  | 3.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |
Segment Reporting Information Investments In Equity Method Investees | 859 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |  |  |  | 911 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraRenewablesSegmentMember |
Sempra Natural Gas Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | 197 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 260 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Percentage of Total Consolidated Revenues | 7.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 9.00%sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Interest Expense | 21 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 32 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Interest Income | 19 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 31 us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Depreciation and Amortization | 12 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 17 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 4.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 6.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | 2 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 6 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Equity Earnings (Losses) Recorded Before Tax | 17 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 15 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Earnings (Losses) | 2 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 9 sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | 0.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 4.00%sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 10 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 40 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 1.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 5.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Segment reporting information, Assets | 6,032 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |  | 6,436 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | 15.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |  | 16.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |
Segment Reporting Information Investments In Equity Method Investees | 1,319 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |  | 1,347 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |
Segment Reporting Information, Intersegment Revenues | 43 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  | 79 sre_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_SempraNaturalGasSegmentMember |  |  |
Intercompany Eliminations Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Interest Expense | (32)us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_IntercompanyEliminationsSegmentMember |  | (33)us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = sre_IntercompanyEliminationsSegmentMember |  |  |
Segment reporting information, Interest Income | (18)us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_IntercompanyEliminationsSegmentMember |  | (30)us-gaap_InvestmentIncomeInterest / us-gaap_StatementBusinessSegmentsAxis = sre_IntercompanyEliminationsSegmentMember |  |  |
Intersegment Revenues Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Revenue | (89)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentRevenuesSegmentMember | [3] | (122)us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentRevenuesSegmentMember | [3] |  |
Segment reporting information, Percentage of Total Consolidated Revenues | (3.00%)sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentRevenuesSegmentMember |  | (4.00%)sre_SegmentReportingInformationPercentageOfRevenues / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentRevenuesSegmentMember |  |  |
Intersegment Receivables Segment [Member] |  |  |  |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Assets | (2,618)us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentReceivablesSegmentMember |  |  |  | (2,561)us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentReceivablesSegmentMember |
Segment reporting information, Percentage of Consolidated Assets | (6.00%)sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentReceivablesSegmentMember |  |  |  | (6.00%)sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = sre_IntersegmentReceivablesSegmentMember |
All Other Segments [Member] |  |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |  |
Segment reporting information, Interest Expense | 63 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 58 us-gaap_InterestExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Depreciation and Amortization | 1 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Percentage of Consolidated Depreciation and Amortization | 0.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 1.00%sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Income Tax Expense (Benefit) | (29)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | (21)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Earnings (Losses) | (27)sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | (44)sre_SegmentReportingInformationEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Percentage of Consolidated Earnings (Losses) | (6.00%)sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | (18.00%)sre_SegmentReportingInformationPercentageOfEarningsLosses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |  |
Segment reporting information, Expenditures for property plant and equipment | 11 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 1 sre_SegmentReportingInformationExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment | 1.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  | 0.00%sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |
Segment reporting information, Assets | 960 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 895 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Segment reporting information, Percentage of Consolidated Assets | 2.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 2.00%sre_SegmentReportingInformationPercentageOfAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Segment Reporting Information Investments In Equity Method Investees | $ 163 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | $ 164 sre_SegmentReportingInformationInvestmentsInEquityMethodInvestees / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
[1] | Derived from audited financial statements.
[2] | After preferred dividends.
[3] | Revenues for reportable segments include intersegment revenues of $2 million, $19 million, $25 million and $43 million for the three months ended March 31, 2015 and $3 million, $18 million, $22 million and $79 million for the three months ended March 31, 2014 for SDG&E, SoCalGas, Sempra Mexico and Sempra Natural Gas, respectively.

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