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	<xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
	<xs:import namespace="http://fasb.org/us-types/2011-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2011/elts/us-types-2011-01-31.xsd"/>
	<xs:element name="IncomeBeforeIncomeTaxes" id="gas_IncomeBeforeIncomeTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="GasDistributionMercuryRelatedRecoveries" id="gas_GasDistributionMercuryRelatedRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="ShippingOperatingExpense" id="gas_ShippingOperatingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="GasInStorage" id="gas_GasInStorage" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DeferredAccruedGasCosts" id="gas_DeferredAccruedGasCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DerivativeInstruments" id="gas_DerivativeInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MarginAccountsDerivativeInstruments" id="gas_MarginAccountsDerivativeInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RegulatoryAssetRetirementCostLiabilityNoncurrent" id="gas_RegulatoryAssetRetirementCostLiabilityNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="TotalDeferredCreditsAndOtherLiabilities" id="gas_TotalDeferredCreditsAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="IncomeTaxesAbstract" id="gas_IncomeTaxesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FairValueMeasurementsAbstract" id="gas_FairValueMeasurementsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EquityInvestmentIncomeNetAbstract" id="gas_EquityInvestmentIncomeNetAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="GuaranteesAndIndemnitiesTextBlock" id="gas_GuaranteesAndIndemnitiesTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ProceedsFromIssuingLongTermDebt" id="gas_ProceedsFromIssuingLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TotalLongTermObligations" id="gas_TotalLongTermObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="PostretirementBenefitsAbstract" id="gas_PostretirementBenefitsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BusinessSegmentsAbstract" id="gas_BusinessSegmentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RegulatoryProceedingsAbstract" id="gas_RegulatoryProceedingsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SubstituteNaturalGasAbstract" id="gas_SubstituteNaturalGasAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CapacityOfCoalGasificationPlant" id="gas_CapacityOfCoalGasificationPlant" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="BasisOfPresentationAbstract" id="gas_BasisOfPresentationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ContingenciesAbstract" id="gas_ContingenciesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="VolumesAbstract" id="gas_VolumesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DerivativesNotDesignatedAsHedgingInstrumentsGainLossDeferredAsRegulatoryAssetsOrLiabilities" id="gas_DerivativesNotDesignatedAsHedgingInstrumentsGainLossDeferredAsRegulatoryAssetsOrLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="InitialPbrReserve" id="gas_InitialPbrReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="LossContingencyIncludedInPbrReserve" id="gas_LossContingencyIncludedInPbrReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="RecordedPbrReserve" id="gas_RecordedPbrReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="Unrecognized2002pbrClaimedReceivable" id="gas_Unrecognized2002pbrClaimedReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="AmountOfSanctionsSoughtPerCubMotion" id="gas_AmountOfSanctionsSoughtPerCubMotion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="UnrecognizedRecoverySoughtByNicorGas" id="gas_UnrecognizedRecoverySoughtByNicorGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="UnrecognizedAmountOfInterestIncludedInRecoveryAmountSoughtByNicorGas" id="gas_UnrecognizedAmountOfInterestIncludedInRecoveryAmountSoughtByNicorGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="PbrPlanClaimsAbstract" id="gas_PbrPlanClaimsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MercuryLossContingencyEstimateAbstract" id="gas_MercuryLossContingencyEstimateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ManufacturedGasPlantSitesLossContingencyEstimateAbstract" id="gas_ManufacturedGasPlantSitesLossContingencyEstimateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PercentOfCleanupCostsAllocatedToCompany" id="gas_PercentOfCleanupCostsAllocatedToCompany" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="NumberOfSites" id="gas_NumberOfSites" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="NumberOfSitesWithNoCleanupResponsibility" id="gas_NumberOfSitesWithNoCleanupResponsibility" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="PercentOfGeneralRemediationProgramCostsThatDoNotRelateExclusivelyToParticularSites" id="gas_PercentOfGeneralRemediationProgramCostsThatDoNotRelateExclusivelyToParticularSites" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="MunicipalTaxMattersLossContingencyAbstract" id="gas_MunicipalTaxMattersLossContingencyAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="NumberOfMunicipalitiesWhichFiledActionAgainstCompany" id="gas_NumberOfMunicipalitiesWhichFiledActionAgainstCompany" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="NumberOfMunicipalitiesWhichIssuedAssessmentsAgainstCompany" id="gas_NumberOfMunicipalitiesWhichIssuedAssessmentsAgainstCompany" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="DescriptionOfOrderIssued" id="gas_DescriptionOfOrderIssued" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BenchmarkOfNetBadDebtRiderRecoveryFromCustomers" id="gas_BenchmarkOfNetBadDebtRiderRecoveryFromCustomers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="ContingentConsiderationOnDivestiture" id="gas_ContingentConsiderationOnDivestiture" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="LineOfCreditFacilityTerm" id="gas_LineOfCreditFacilityTerm" type="us-types:durationStringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DefinedBenefitPlanPercentageOfCostCapitalizedAsCostOfConstructingGasDistributionFacilities" id="gas_DefinedBenefitPlanPercentageOfCostCapitalizedAsCostOfConstructingGasDistributionFacilities" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CommodityDerivativeAssetsFairValueDisclosure" id="gas_CommodityDerivativeAssetsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue" id="gas_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="NetRealizedUnrealizedGainsLossesAbstract" id="gas_NetRealizedUnrealizedGainsLossesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInRegulatoryAssetsAndLiabilities" id="gas_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityGainLossIncludedInRegulatoryAssetsAndLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlements" id="gas_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityPurchasesSalesIssuancesSettlements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersIntoLevel3" id="gas_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersIntoLevel3" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersOutOfLevel3" id="gas_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLiabilityTransfersOutOfLevel3" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisNetUnrealizedGainLossIncludedInEarnings" id="gas_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisNetUnrealizedGainLossIncludedInEarnings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="ForeignCompanyShippingEarnings" id="gas_ForeignCompanyShippingEarnings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="IncomeTaxesDetailsAbstract" id="gas_IncomeTaxesDetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AccountingPoliciesDetailsAbstract" id="gas_AccountingPoliciesDetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AccountingPoliciesTablesAbstract" id="gas_AccountingPoliciesTablesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MinimumYearsExpectedToRecoverRegulatoryPostretirementAssetFromRatepayers" id="gas_MinimumYearsExpectedToRecoverRegulatoryPostretirementAssetFromRatepayers" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MaximumYearsExpectedToRecoverRegulatoryPostretirementAssetFromRatepayers" id="gas_MaximumYearsExpectedToRecoverRegulatoryPostretirementAssetFromRatepayers" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AccountingPoliciesPoliciesAbstract" id="gas_AccountingPoliciesPoliciesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CreditRiskConcentrationRiskPolicyTextBlock" id="gas_CreditRiskConcentrationRiskPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" id="gas_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="GasInStorageAbstract" id="gas_GasInStorageAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EffectOfLifoInventoryLiquidationOnCostOfGas" id="gas_EffectOfLifoInventoryLiquidationOnCostOfGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="ScheduleOfMarketableSecuritiesTableTextBlock" id="gas_ScheduleOfMarketableSecuritiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="IncomeTaxExaminationYearSubjectToExamination" id="gas_IncomeTaxExaminationYearSubjectToExamination" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="UnamortizedInvestmentTaxCredits" id="gas_UnamortizedInvestmentTaxCredits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="MarginByBalanceSheetGroupingTextBlock" id="gas_MarginByBalanceSheetGroupingTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OtherCurrentMarginLiabilities" id="gas_OtherCurrentMarginLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="OtherNoncurrentMarginLiabilities" id="gas_OtherNoncurrentMarginLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="PostretirementBenefitAccountingPolicyPolicyTextBlock" id="gas_PostretirementBenefitAccountingPolicyPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EquityInvestmentIncomeNet" id="gas_EquityInvestmentIncomeNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="CashDistributionsFromEquityInvestees" id="gas_CashDistributionsFromEquityInvestees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="NaturalWeatherHedge" id="gas_NaturalWeatherHedge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="DerivativeNonmonetaryNotionalAmountCompanyUse" id="gas_DerivativeNonmonetaryNotionalAmountCompanyUse" type="num:volumeItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="DerivativeNonmonetaryNotionalAmountCustomerUse" id="gas_DerivativeNonmonetaryNotionalAmountCustomerUse" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="BusinessCombinationProposedCashConsiderationToBeReceivedPerShareCommonStock" id="gas_BusinessCombinationProposedCashConsiderationToBeReceivedPerShareCommonStock" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="ProposedMergerWithAglResourcesAbstract" id="gas_ProposedMergerWithAglResourcesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RegulatoryPostretirementAssetMember" id="gas_RegulatoryPostretirementAssetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DeferredEnvironmentalCostsMember" id="gas_DeferredEnvironmentalCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OtherRegulatoryAssetMember" id="gas_OtherRegulatoryAssetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AccruedGasCostsMember" id="gas_AccruedGasCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RegulatoryIncomeTaxLiabilityMember" id="gas_RegulatoryIncomeTaxLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OtherRegulatoryLiabilityMember" id="gas_OtherRegulatoryLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BadDebtRiderMember" id="gas_BadDebtRiderMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration">
		<xs:annotation>
			<xs:documentation xml:lang="en-US">Amount of cumulative recovery (refund to) customers over (under) the benchmark of bad debt expense established in rate cases.</xs:documentation>
		</xs:annotation>
	</xs:element>
	<xs:element name="ScheduleOfMarketableSecuritiesTable" id="gas_ScheduleOfMarketableSecuritiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ScheduleOfMarketableSecuritiesByClassOfSecuritiesAxis" id="gas_ScheduleOfMarketableSecuritiesByClassOfSecuritiesAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ClassOfSecuritiesDomain" id="gas_ClassOfSecuritiesDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ScheduleOfMarketableSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis" id="gas_ScheduleOfMarketableSecuritiesMajorTypesOfDebtAndEquitySecuritiesAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ScheduleOfMarketableSecuritiesLineItems" id="gas_ScheduleOfMarketableSecuritiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RevolverMember" id="gas_RevolverMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RevolverBMember" id="gas_RevolverBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RevolverCMember" id="gas_RevolverCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="RevolverDMember" id="gas_RevolverDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SecuredDebtsMember" id="gas_SecuredDebtsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SecuredDebtsBMember" id="gas_SecuredDebtsBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DerivativeInstrumentsMember" id="gas_DerivativeInstrumentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OperatingRevenuesMember" id="gas_OperatingRevenuesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="OperatingAndMaintenanceMember" id="gas_OperatingAndMaintenanceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TritonMember" id="gas_TritonMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EnEngineeringMember" id="gas_EnEngineeringMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ShippingMember" id="gas_ShippingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="WholesaleMarketingMember" id="gas_WholesaleMarketingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="GasDistributionsEquipmentMember" id="gas_GasDistributionsEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FinancialGuaranteesMember" id="gas_FinancialGuaranteesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PbrPlanMember" id="gas_PbrPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MercuryMember" id="gas_MercuryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ManufacturedGasPlantSitesMember" id="gas_ManufacturedGasPlantSitesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MunicipalTaxMattersMember" id="gas_MunicipalTaxMattersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="IllinoisCommerceCommissionMember" id="gas_IllinoisCommerceCommissionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="IllinoisAttorneyGeneralsOfficeMember" id="gas_IllinoisAttorneyGeneralsOfficeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CitizensUtilityBoardMember" id="gas_CitizensUtilityBoardMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PartiesAffiliatedWithLossContingenciesByNatureOfContingencyAxis" id="gas_PartiesAffiliatedWithLossContingenciesByNatureOfContingencyAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PartiesAffiliatedWithLossContingenciesByLossContingencyNatureDomain" id="gas_PartiesAffiliatedWithLossContingenciesByLossContingencyNatureDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TemporaryLifoInventoryLiquidation" id="gas_TemporaryLifoInventoryLiquidation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BusinessCombinationProposedEquityConsiderationToBeReceivedPerShareCommonStock" id="gas_BusinessCombinationProposedEquityConsiderationToBeReceivedPerShareCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="MergerRelatedCostsIncurredAndExpensed" id="gas_MergerRelatedCostsIncurredAndExpensed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="GasInventoryDecrementInVolume" id="gas_GasInventoryDecrementInVolume" type="xbrli:pureItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="LifoCostOfLiquidatedInventoryChargedToCostOfGasPerMcf" id="gas_LifoCostOfLiquidatedInventoryChargedToCostOfGasPerMcf" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="EstimatedReplacementCostOfLiquidatedInventoryPerMcf" id="gas_EstimatedReplacementCostOfLiquidatedInventoryPerMcf" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="LowerOfCostOfMarketValuationCharges" id="gas_LowerOfCostOfMarketValuationCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="CumulativeForeignCompanyShippingEarnings" id="gas_CumulativeForeignCompanyShippingEarnings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="StateOfIllinoisCorporateIncomeTaxRate" id="gas_StateOfIllinoisCorporateIncomeTaxRate" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="CommodityDerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure" id="gas_CommodityDerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="Settlements" id="gas_Settlements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="Purchases" id="gas_Purchases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
	<xs:element name="CashFlowHedgeGainLossDeferredInAoci" id="gas_CashFlowHedgeGainLossDeferredInAoci" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="CashFlowHedgeGainLossDeferredInAociAfterTax" id="gas_CashFlowHedgeGainLossDeferredInAociAfterTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="InterestRateCashFlowHedgeGainLossDeferredInAoci" id="gas_InterestRateCashFlowHedgeGainLossDeferredInAoci" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="InterestRateCashFlowHedgeGainLossDeferredInAociAfterTax" id="gas_InterestRateCashFlowHedgeGainLossDeferredInAociAfterTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="MaximumLengthOfTimeHedgedCustomerUse" id="gas_MaximumLengthOfTimeHedgedCustomerUse" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BedDebtExperienceOverUnderBenchmark" id="gas_BedDebtExperienceOverUnderBenchmark" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="LitigationRelatingToProposedMergerAbstract" id="gas_LitigationRelatingToProposedMergerAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ProposedSettlementAmount" id="gas_ProposedSettlementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
	<xs:element name="AdjustmentToPreviouslyRecordedPbrReserve" id="gas_AdjustmentToPreviouslyRecordedPbrReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
	<xs:element name="LongTermDebtInstrumentAxis" id="gas_LongTermDebtInstrumentAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="LongTermDebtInstrumentNameDomain" id="gas_LongTermDebtInstrumentNameDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="FaceAmountOfFirstMortgageBonds" id="gas_FaceAmountOfFirstMortgageBonds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="ProposedMergerAbstract" id="gas_ProposedMergerAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MaturityDateOfFirstMortgageBonds" id="gas_MaturityDateOfFirstMortgageBonds" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AmountOfRecoveryFromRefundToCustomersOverUnderBenchmarkOfBadDebtExpenseEstablishedInRateCases" id="gas_AmountOfRecoveryFromRefundToCustomersOverUnderBenchmarkOfBadDebtExpenseEstablishedInRateCases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="ProductWarrantyMember" id="gas_ProductWarrantyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="ReserveRecorded" id="gas_ReserveRecorded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
	<xs:element name="ShortTermDebtIssuer" id="gas_ShortTermDebtIssuer" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="BadDebtRider" id="gas_BadDebtRider" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SubstituteNaturalGas30YearContractAbstract" id="gas_SubstituteNaturalGas30YearContractAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TermOfContract" id="gas_TermOfContract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="TermOfContract2" id="gas_TermOfContract2" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>

	<xs:element name="VolumeOfSubstituteNatualGas30YearContract" id="gas_VolumeOfSubstituteNatualGas30YearContract" type="xbrli:pureItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/>
	<xs:element name="VolumeOfSubstituteNaturalGas" id="gas_VolumeOfSubstituteNaturalGas" type="xbrli:pureItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant"/></xs:schema>
</XBRL>