<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.3.1.900</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>582</ContextCount>
  <ElementCount>604</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>103</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002000 - Statement - CONSOLIDATED STATEMENTS OF INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfIncome</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1002501 - Statement - CONSOLIDATED STATEMENTS OF INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfIncomeParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF INCOME (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1003000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1003501 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfComprehensiveIncomeParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1005000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1005501 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfCashFlowsParentheticals</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1006000 - Statement - CONSOLIDATED STATEMENTS OF COMMON EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ConsolidatedStatementsOfCommonEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMMON EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - RATE AND OTHER REGULATORY MATTERS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMatters</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - COMMON EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommonEquity</Role>
      <ShortName>COMMON EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - LONG-TERM AND SHORT-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/LongTermAndShortTermDebt</Role>
      <ShortName>LONG-TERM AND SHORT-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/IncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/FairValueMeasurementsIncludingDerivatives</Role>
      <ShortName>FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - EMPLOYEE BENEFIT PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlans</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - SHARE-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ShareBasedCompensation</Role>
      <ShortName>SHARE-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - AFFILIATED TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/AffiliatedTransactions</Role>
      <ShortName>AFFILIATED TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - SEGMENT OF BUSINESS INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SegmentOfBusinessInformation</Role>
      <ShortName>SEGMENT OF BUSINESS INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - DISPOSITIONS (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.scana.com/role/DispositionsNotes</Role>
      <ShortName>DISPOSITIONS (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - QUARTERLY FINANCIAL INFORMATION (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.scana.com/role/QuarterlyFinancialInformationNotes</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2302301 - Disclosure - RATE AND OTHER REGULATORY MATTERS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMattersTables</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/RateAndOtherRegulatoryMatters</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - LONG-TERM AND SHORT-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/LongTermAndShortTermDebtTables</Role>
      <ShortName>LONG-TERM AND SHORT-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/LongTermAndShortTermDebt</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/IncomeTaxesTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/IncomeTaxes</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/FairValueMeasurementsIncludingDerivativesTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/FairValueMeasurementsIncludingDerivatives</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansTables</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/EmployeeBenefitPlans</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - COMMITMENTS AND CONTINGENCIES ARO (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommitmentsAndContingenciesAroTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES ARO (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - SEGMENT OF BUSINESS INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SegmentOfBusinessInformationTables</Role>
      <ShortName>SEGMENT OF BUSINESS INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/SegmentOfBusinessInformation</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - DISPOSITIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DispositionsTables</Role>
      <ShortName>DISPOSITIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/DispositionsNotes</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2314301 - Disclosure - QUARTERLY FINANCIAL INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/QuarterlyFinancialInformationTables</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.scana.com/role/QuarterlyFinancialInformationNotes</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - RATE AND OTHER REGULATORY MATTERS RATE AND OTHER REGULATORY MATTERS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMattersRateAndOtherRegulatoryMattersDetails</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS RATE AND OTHER REGULATORY MATTERS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - RATE AND OTHER REGULATORY MATTERS ELECTRIC-BLRA (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMattersElectricBlraDetails</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS ELECTRIC-BLRA (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2402404 - Disclosure - RATE AND OTHER REGULATORY MATTERS GAS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMattersGasDetails</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS GAS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/RateAndOtherRegulatoryMattersTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2402405 - Disclosure - REGULATORY ASSETS AND LIABILITIES(Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RegulatoryAssetsAndLiabilitiesdetails</Role>
      <ShortName>REGULATORY ASSETS AND LIABILITIES(Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2402406 - Disclosure - RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/RateAndOtherRegulatoryMattersNarrativeDetails</Role>
      <ShortName>RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - COMMON EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommonEquityDetails</Role>
      <ShortName>COMMON EQUITY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/CommonEquity</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - LONG-TERM AND SHORT-TERM DEBT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/LongTermAndShortTermDebtDetails</Role>
      <ShortName>LONG-TERM AND SHORT-TERM DEBT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/LongTermAndShortTermDebtTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - LONG-TERM AND SHORT-TERM DEBT (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/LongTermAndShortTermDebtDetails2</Role>
      <ShortName>LONG-TERM AND SHORT-TERM DEBT (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/LongTermAndShortTermDebtTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2404404 - Disclosure - LONG-TERM AND SHORT-TERM DEBT (NARRATIVE) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/LongTermAndShortTermDebtNarrativeDetails</Role>
      <ShortName>LONG-TERM AND SHORT-TERM DEBT (NARRATIVE) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/LongTermAndShortTermDebtTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/IncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/IncomeTaxesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2405403 - Disclosure - INCOME TAXES INCOME TAXES (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/IncomeTaxesIncomeTaxesDetails2</Role>
      <ShortName>INCOME TAXES INCOME TAXES (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2405404 - Disclosure - INCOME TAXES INCOME TAXES (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/IncomeTaxesIncomeTaxesDetails3</Role>
      <ShortName>INCOME TAXES INCOME TAXES (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/DerivativeFinancialInstrumentsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2406403 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS FAIR VALUE ON BALANCE SHEET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsFairValueOnBalanceSheetDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS FAIR VALUE ON BALANCE SHEET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2406404 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS ON INCOME STATEMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsOnIncomeStatementDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS ON INCOME STATEMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2406405 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (CREDIT RISK) (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsCreditRiskDetails3</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (CREDIT RISK) (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/DerivativeFinancialInstrumentsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2406406 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS OFFSETTING ASSETS AND LIABILITIES  (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DerivativeFinancialInstrumentsOffsettingAssetsAndLiabilitiesDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS OFFSETTING ASSETS AND LIABILITIES  (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/FairValueMeasurementsIncludingDerivativesDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/FairValueMeasurementsIncludingDerivativesTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/FairValueMeasurementsIncludingDerivativesDetails2</Role>
      <ShortName>FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/FairValueMeasurementsIncludingDerivativesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - EMPLOYEE BENEFIT PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansDetails</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansEmployeeBenefitPlansDetails2</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansEmployeeBenefitPlansDetails3</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2408405 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansEmployeeBenefitPlansDetails4</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2408406 - Disclosure - EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/EmployeeBenefitPlansEmployeeBenefitPlansDetails5</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - SHARE-BASED COMPENSATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ShareBasedCompensationDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/ShareBasedCompensation</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - SHARE-BASED COMPENSATION Liability Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ShareBasedCompensationLiabilityAwardsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION Liability Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/CommitmentsAndContingenciesAroTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2410405 - Disclosure - COMMITMENTS AND CONTINGENCIES Nuclear (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/CommitmentsAndContingenciesNuclearDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES Nuclear (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/CommitmentsAndContingenciesAroTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2411401 - Disclosure - AFFILIATED TRANSACTIONS - SCEG (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/AffiliatedTransactionsScegDetails</Role>
      <ShortName>AFFILIATED TRANSACTIONS - SCEG (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - SEGMENT OF BUSINESS INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/SegmentOfBusinessInformationDetails</Role>
      <ShortName>SEGMENT OF BUSINESS INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/SegmentOfBusinessInformationTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - DISPOSITIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/DispositionsDetails</Role>
      <ShortName>DISPOSITIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/DispositionsTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - QUARTERLY FINANCIAL INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/QuarterlyFinancialInformationDetails</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.scana.com/role/QuarterlyFinancialInformationTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="scg-20151231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2415401 - Schedule - Schedule II (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.scana.com/role/ScheduleIiDetails</Role>
      <ShortName>Schedule II (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>scg-20151231.xml</File>
    <File>scg-20151231.xsd</File>
    <File>scg-20151231_cal.xml</File>
    <File>scg-20151231_def.xml</File>
    <File>scg-20151231_lab.xml</File>
    <File>scg-20151231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
