$ATO
ATMOS ENERGY CORP Stock $ato

$ato Overview Financials Valuation SEC Filings Company Website

2018 Q1 Form 10-Q Financial Statement

#000073180218000020 Filed on May 02, 2018

Income Statement

Concept	2018 Q1	2017 Q1
Revenue	$1.219B	$988.2M
YoY Change	23.4%	11.03%
Cost Of Revenue	$627.0M	$427.5M
YoY Change	46.67%	13.28%
Gross Profit	$592.4M	$560.7M
YoY Change	5.65%	9.37%
Gross Profit Margin	48.58%	56.74%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$89.40M	$77.70M
YoY Change	15.06%	7.92%
% of Gross Profit	15.09%	13.86%
Operating Expenses	$321.5M	$275.5M
YoY Change	16.7%	2.88%
Operating Profit	$270.9M	$285.2M
YoY Change	-5.0%	13.32%
Interest Expense	$27.30M	$26.94M
YoY Change	1.34%	-2.23%
% of Operating Profit	10.08%	9.45%
Other Income/Expense, Net	-$2.167M	$833.0K
YoY Change	-360.14%	-353.19%
Pretax Income	$241.4M	$259.1M
YoY Change	-6.81%	15.77%
Income Tax	$62.44M	$97.05M
% Of Pretax Income	25.86%	37.46%
Net Earnings	$179.0M	$164.7M
YoY Change	8.66%	16.16%
Net Earnings / Revenue	14.68%	16.67%
Basic Earnings Per Share	$1.60
Diluted Earnings Per Share	$1.60	$1.555M
COMMON SHARES
Basic Shares Outstanding	111.7M shares	105.2M shares
Diluted Shares Outstanding	111.7M shares

Balance Sheet

Concept	2018 Q1	2017 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$71.00M	$45.00M
YoY Change	57.78%	-6.25%
Cash & Equivalents	$71.07M	$45.40M
Short-Term Investments
Other Short-Term Assets	$55.26M	$61.02M
YoY Change	-9.43%	16.33%
Inventory	$89.00M	$120.0M
Prepaid Expenses
Receivables	$407.1M	$336.6M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$622.7M	$563.1M
YoY Change	10.59%	-13.76%
LONG-TERM ASSETS
Property, Plant & Equipment	$9.761B	$8.738B
YoY Change	11.71%	11.47%
Goodwill	$730.1M	$729.7M
YoY Change	0.06%	-1.75%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$242.1M	$330.2M
YoY Change	-26.68%	6.9%
Total Long-Term Assets	$10.73B	$9.798B
YoY Change	9.54%	10.21%
TOTAL ASSETS
Total Short-Term Assets	$622.7M	$563.1M
Total Long-Term Assets	$10.73B	$9.798B
Total Assets	$11.36B	$10.36B
YoY Change	9.6%	8.57%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$231.0M	$185.0M
YoY Change	24.86%	-18.5%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$129.6M	$670.6M
YoY Change	-80.67%	6.97%
Long-Term Debt Due	$450.0M	$250.0M
YoY Change	80.0%
Total Short-Term Liabilities	$1.349B	$1.496B
YoY Change	-9.82%	21.89%
LONG-TERM LIABILITIES
Long-Term Debt	$2.618B	$2.315B
YoY Change	13.1%	-5.74%
Other Long-Term Liabilities	$100.9M	$155.1M
YoY Change	-34.91%	-34.72%
Total Long-Term Liabilities	$2.719B	$2.470B
YoY Change	10.09%	-8.3%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.349B	$1.496B
Total Long-Term Liabilities	$2.719B	$2.470B
Total Liabilities	$4.068B	$3.966B
YoY Change	2.58%	1.16%
SHAREHOLDERS EQUITY
Retained Earnings	$1.854B	$1.457B
YoY Change	27.27%	16.99%
Common Stock	$2.952B	$2.465B
YoY Change	19.77%	9.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.721B	$3.835B
YoY Change
Total Liabilities & Shareholders Equity	$11.36B	$10.36B
YoY Change	9.6%	8.57%

Cashflow Statement

Concept	2018 Q1	2017 Q1
OPERATING ACTIVITIES
Net Income	$179.0M	$164.7M
YoY Change	8.66%	16.16%
Depreciation, Depletion And Amortization	$89.40M	$77.70M
YoY Change	15.06%	7.92%
Cash From Operating Activities	$578.2M	$435.0M
YoY Change	32.92%	13.61%
INVESTING ACTIVITIES
Capital Expenditures	-$310.8M	-$261.4M
YoY Change	18.9%	6.43%
Acquisitions
YoY Change
Other Investing Activities	$3.900M	$136.9M
YoY Change	-97.15%	5604.17%
Cash From Investing Activities	-$306.7M	-$124.6M
YoY Change	146.15%	-48.77%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-255.1M	-309.8M
YoY Change	-17.66%	81.59%
NET CHANGE
Cash From Operating Activities	578.2M	435.0M
Cash From Investing Activities	-306.7M	-124.6M
Cash From Financing Activities	-255.1M	-309.8M
Net Change In Cash	16.40M	600.0K
YoY Change	2633.33%	-101.94%
FREE CASH FLOW
Cash From Operating Activities	$578.2M	$435.0M
Capital Expenditures	-$310.8M	-$261.4M
Free Cash Flow	$889.0M	$696.4M
YoY Change	27.66%	10.8%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	ato	Minimum Hedge Percentage Of Anticipated Heating Season Gas MinimumHedgePercentageOfAnticipatedHeatingSeasonGas	0.25
CY2018Q1	ato	Atm Equity Distribution Offering Price Maximum Amount ATMEquityDistributionOfferingPriceMaximumAmount	500000000	USD
	ato	Atm Equity Distribution Shares Issued ATMEquityDistributionSharesIssued	0	shares
CY2018Q1	ato	Accumulated Other Comprehensive Income Loss Derivatives Qualifyingas Hedges Interest Rate Agreements Realized Gain Loss Netof Tax AccumulatedOtherComprehensiveIncomeLossDerivativesQualifyingasHedgesInterestRateAgreementsRealizedGainLossNetofTax	-49100000	USD
CY2017Q3	ato	Available For Sale Securities Supplemental Executive Benefit Plans AvailableForSaleSecuritiesSupplementalExecutiveBenefitPlans	42900000	USD
CY2018Q1	ato	Available For Sale Securities Supplemental Executive Benefit Plans AvailableForSaleSecuritiesSupplementalExecutiveBenefitPlans	46200000	USD
	ato	Blended Federal Statutory Income Tax Rate Percent BlendedFederalStatutoryIncomeTaxRatePercent	0.245
	ato	Block Trade Gross Proceeds BlockTradeGrossProceeds	400000000	USD
	ato	Block Trade Net Proceeds BlockTradeNetProceeds	395100000	USD
CY2018Q1	ato	Block Tradesharesauthorizedforissuance BlockTradesharesauthorizedforissuance	4558404	shares
	ato	Charitable Contribution Carryforwards Expiration Date Maximum CharitableContributionCarryforwardsExpirationDateMaximum	2023-12-31
	ato	Charitable Contribution Carryforwards Expiration Date Minimum CharitableContributionCarryforwardsExpirationDateMinimum	2018-12-31
CY2018Q1	ato	Debt And Equity Securities Authorized For Issuance DebtAndEquitySecuritiesAuthorizedForIssuance	2500000000.0	USD
CY2018Q1	ato	Debt And Equity Securities Available For Issuance DebtAndEquitySecuritiesAvailableForIssuance	1200000000	USD
	ato	Deferred Tax Liabilities Tcja Deduction DeferredTaxLiabilitiesTCJADeduction	903500000	USD
CY2017Q3	ato	Derivative Asset Contract Netting DerivativeAssetContractNetting	0	USD
CY2018Q1	ato	Derivative Asset Contract Netting DerivativeAssetContractNetting	0	USD
CY2017Q3	ato	Derivative Asset Netof Contract Netting DerivativeAssetNetofContractNetting	3239000	USD
CY2018Q1	ato	Derivative Asset Netof Contract Netting DerivativeAssetNetofContractNetting	602000	USD
CY2017Q3	ato	Derivative Liability Contract Netting DerivativeLiabilityContractNetting	0	USD
CY2018Q1	ato	Derivative Liability Contract Netting DerivativeLiabilityContractNetting	0	USD
CY2017Q3	ato	Derivative Liability Netof Contract Netting DerivativeLiabilityNetofContractNetting	112398000	USD
CY2018Q1	ato	Derivative Liability Netof Contract Netting DerivativeLiabilityNetofContractNetting	86944000	USD
CY2017Q1	ato	Disposal Group Including Discontinued Operation Cash Purchase Price DisposalGroupIncludingDiscontinuedOperationCashPurchasePrice	38300000	USD
CY2017Q1	ato	Disposal Group Including Discontinued Operation Consideration Placedin Escrow DisposalGroupIncludingDiscontinuedOperationConsiderationPlacedinEscrow	7000000	USD
CY2017Q1	ato	Disposal Group Including Discontinued Operation Working Capital Adjustment DisposalGroupIncludingDiscontinuedOperationWorkingCapitalAdjustment	109000000	USD
CY2018Q1	ato	Expected Recognitionin Earningsof Deferred Gain Losses Interest Rate Agreements ExpectedRecognitioninEarningsofDeferredGainLossesInterestRateAgreements	-49114000	USD
	ato	Federal Statutory Income Tax Rate Post Tcja Percent FederalStatutoryIncomeTaxRatePostTCJAPercent	0.21
CY2017	ato	Federal Statutory Income Tax Rate Pre Tcja Percent FederalStatutoryIncomeTaxRatePreTCJAPercent	0.35
	ato	Federal Statutory Income Tax Rate Pre Tcja Percent FederalStatutoryIncomeTaxRatePreTCJAPercent	0.35
	ato	Hedge Percentage Of Anticipated Heating Season Gas HedgePercentageOfAnticipatedHeatingSeasonGas	0.26
	ato	Hedge Volume Of Anticipated Heating Season Gas HedgeVolumeOfAnticipatedHeatingSeasonGas	15000	MMcf
CY2017Q1	ato	Incomefromcontinuingoperationsavailabletocommonshareholders Incomefromcontinuingoperationsavailabletocommonshareholders	161819000	USD
	ato	Incomefromcontinuingoperationsavailabletocommonshareholders Incomefromcontinuingoperationsavailabletocommonshareholders	275702000	USD
CY2018Q1	ato	Incomefromcontinuingoperationsavailabletocommonshareholders Incomefromcontinuingoperationsavailabletocommonshareholders	178831000	USD
	ato	Incomefromcontinuingoperationsavailabletocommonshareholders Incomefromcontinuingoperationsavailabletocommonshareholders	492665000	USD
	ato	Maximum Hedge Percentage Of Anticipated Heating Season Gas MaximumHedgePercentageOfAnticipatedHeatingSeasonGas	0.5
CY2017Q1	ato	Net Income Loss From Discontinued Operations Available To Common Stockholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonStockholdersBasic	2714000	USD
	ato	Net Income Loss From Discontinued Operations Available To Common Stockholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonStockholdersBasic	13695000	USD
CY2018Q1	ato	Net Income Loss From Discontinued Operations Available To Common Stockholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonStockholdersBasic	0	USD
	ato	Net Income Loss From Discontinued Operations Available To Common Stockholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonStockholdersBasic	0	USD
	ato	Nonregulated Segment Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate NonregulatedSegmentEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.39
CY2018Q1	ato	Number Of Customers Regulated Distribution NumberOfCustomersRegulatedDistribution	3000000	customers
CY2018Q1	ato	Number Of Divisions Regulated Distribution NumberOfDivisionsRegulatedDistribution	6	regulated_gas_distributions_divisions
	ato	One Time Income Tax Benefit Tcja OneTimeIncomeTaxBenefitTCJA	0	USD
CY2018Q1	ato	One Time Income Tax Benefit Tcja OneTimeIncomeTaxBenefitTCJA	3800000	USD
	ato	One Time Income Tax Benefit Tcja OneTimeIncomeTaxBenefitTCJA	165675000	USD
	ato	One Time Income Tax Benefit Tcja OneTimeIncomeTaxBenefitTCJA	165700000	USD
CY2017Q1	ato	Other Comprehensive Income Reclassification Adjustment On Forward Commodity Contracts Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnForwardCommodityContractsIncludedInNetIncomeNetOfTax	0	USD
	ato	Other Comprehensive Income Reclassification Adjustment On Forward Commodity Contracts Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnForwardCommodityContractsIncludedInNetIncomeNetOfTax	-4865000	USD
CY2018Q1	ato	Other Comprehensive Income Reclassification Adjustment On Forward Commodity Contracts Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnForwardCommodityContractsIncludedInNetIncomeNetOfTax	0	USD
	ato	Other Comprehensive Income Reclassification Adjustment On Forward Commodity Contracts Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnForwardCommodityContractsIncludedInNetIncomeNetOfTax	0	USD
CY2017Q1	ato	Other Comprehensive Income Reclassification Adjustment On Interest Rate Agreements Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateAgreementsIncludedInNetIncomeNetOfTax	86000	USD
	ato	Other Comprehensive Income Reclassification Adjustment On Interest Rate Agreements Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateAgreementsIncludedInNetIncomeNetOfTax	173000	USD
CY2018Q1	ato	Other Comprehensive Income Reclassification Adjustment On Interest Rate Agreements Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateAgreementsIncludedInNetIncomeNetOfTax	458000	USD
	ato	Other Comprehensive Income Reclassification Adjustment On Interest Rate Agreements Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateAgreementsIncludedInNetIncomeNetOfTax	835000	USD
CY2017Q1	ato	Other Comprehensive Income Unrealized Gain Loss On Forward Commodity Contracts Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnForwardCommodityContractsArisingDuringPeriodNetOfTax	0	USD
	ato	Other Comprehensive Income Unrealized Gain Loss On Forward Commodity Contracts Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnForwardCommodityContractsArisingDuringPeriodNetOfTax	9847000	USD
CY2018Q1	ato	Other Comprehensive Income Unrealized Gain Loss On Forward Commodity Contracts Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnForwardCommodityContractsArisingDuringPeriodNetOfTax	0	USD
	ato	Other Comprehensive Income Unrealized Gain Loss On Forward Commodity Contracts Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnForwardCommodityContractsArisingDuringPeriodNetOfTax	0	USD
CY2017Q1	ato	Other Comprehensive Income Unrealized Gain Loss On Interest Rate Agreements Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateAgreementsArisingDuringPeriodNetOfTax	4144000	USD
	ato	Other Comprehensive Income Unrealized Gain Loss On Interest Rate Agreements Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateAgreementsArisingDuringPeriodNetOfTax	95271000	USD
CY2018Q1	ato	Other Comprehensive Income Unrealized Gain Loss On Interest Rate Agreements Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateAgreementsArisingDuringPeriodNetOfTax	21786000	USD
	ato	Other Comprehensive Income Unrealized Gain Loss On Interest Rate Agreements Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateAgreementsArisingDuringPeriodNetOfTax	20454000	USD
	ato	Paymentsfor Proceedsfrom Hedge Financing Activities Cash Collateral PaymentsforProceedsfromHedgeFinancingActivitiesCashCollateral	-25670000	USD
	ato	Paymentsfor Proceedsfrom Hedge Financing Activities Cash Collateral PaymentsforProceedsfromHedgeFinancingActivitiesCashCollateral	0	USD
	ato	Regulated Segments Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate RegulatedSegmentsEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.37
CY2017Q3	ato	Regulatory Asset Future Recoverable Pension Costs RegulatoryAssetFutureRecoverablePensionCosts	9400000	USD
CY2018Q1	ato	Regulatory Asset Future Recoverable Pension Costs RegulatoryAssetFutureRecoverablePensionCosts	7800000	USD
CY2017Q3	ato	Regulatory Cost Of Removal Liability RegulatoryCostOfRemovalLiability	485420000	USD
CY2018Q1	ato	Regulatory Cost Of Removal Liability RegulatoryCostOfRemovalLiability	484746000	USD
CY2017Q3	ato	Regulatory Liability Excess Deferred Tax RegulatoryLiabilityExcessDeferredTax	0	USD
CY2018Q1	ato	Regulatory Liability Excess Deferred Tax RegulatoryLiabilityExcessDeferredTax	737798000	USD
CY2018Q1	ato	Self Insured Retention Expense SelfInsuredRetentionExpense	1000000	USD
CY2017Q3	ato	Term Loan Agreement Maximum Borrowing Capacity TermLoanAgreementMaximumBorrowingCapacity	200000000	USD
CY2018Q1	ato	Term Loan Agreement Maximum Borrowing Capacity TermLoanAgreementMaximumBorrowingCapacity	200000000	USD
CY2017Q1	ato	Undistributed Earnings From Discontinued Operations Allocated To Participating Securities UndistributedEarningsFromDiscontinuedOperationsAllocatedToParticipatingSecurities	2000	USD
	ato	Undistributed Earnings From Discontinued Operations Allocated To Participating Securities UndistributedEarningsFromDiscontinuedOperationsAllocatedToParticipatingSecurities	15000	USD
CY2018Q1	ato	Undistributed Earnings From Discontinued Operations Allocated To Participating Securities UndistributedEarningsFromDiscontinuedOperationsAllocatedToParticipatingSecurities	0	USD
	ato	Undistributed Earnings From Discontinued Operations Allocated To Participating Securities UndistributedEarningsFromDiscontinuedOperationsAllocatedToParticipatingSecurities	0	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-03-31
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000731802
CY2018Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	111064659	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	Atmos Energy Corporation
CY2017Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	233050000	USD
CY2018Q1	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	230823000	USD
CY2017Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	222263000	USD
CY2018Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	407134000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-105254000	USD
CY2018Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-85011000	USD
CY2017Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2536365000	USD
CY2018Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2951545000	USD
CY2017Q3	us-gaap	Assets Assets	10749596000	USD
CY2018Q1	us-gaap	Assets Assets	11356322000	USD
CY2017Q3	us-gaap	Assets Current AssetsCurrent	539646000	USD
CY2018Q1	us-gaap	Assets Current AssetsCurrent	622736000	USD
CY2017Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	91648000	USD
CY2018Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	94267000	USD
CY2017Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	88409000	USD
CY2018Q1	us-gaap	Available For Sale Securities AvailableForSaleSecurities	93665000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	11203000	USD
CY2018Q1	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	10229000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	38000	USD
CY2018Q1	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	497000	USD
CY2017Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	77244000	USD
CY2018Q1	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	83933000	USD
CY2017Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	6965711000	USD
CY2018Q1	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	7339238000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47534000	USD
CY2017Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45403000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26409000	USD
CY2018Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	71074000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2131000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	44665000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	133560000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	3000000	USD
CY2017Q3	us-gaap	Commercial Paper CommercialPaper	447700000	USD
CY2018Q1	us-gaap	Commercial Paper CommercialPaper	129600000	USD
CY2017Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.450
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.90
CY2018Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.485
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.97
CY2017Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue	0.005
CY2018Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0.005
CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2018Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106104634	shares
CY2018Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	111060328	shares
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106104634	shares
CY2018Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	111060328	shares
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	531000	USD
CY2018Q1	us-gaap	Common Stock Value CommonStockValue	555000	USD
CY2017Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	170488000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	390888000	USD
CY2018Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	200297000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	513367000	USD
CY2017Q1	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	427494000	USD
	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	738799000	USD
CY2018Q1	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	626960000	USD
	us-gaap	Cost Of Natural Gas Purchases CostOfNaturalGasPurchases	993877000	USD
CY2017Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3085000000	USD
CY2017Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3085000000	USD
CY2018Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3085000000	USD
CY2018Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3085000000	USD
CY2017Q3	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	3382272000	USD
CY2018Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	3291629000	USD
CY2017Q3	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-4384000	USD
CY2018Q1	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-4412000	USD
CY2017Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	22339000	USD
CY2018Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	21520000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	148657000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	116023000	USD
CY2018Q1	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	5200000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1878699000	USD
CY2018Q1	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1107036000	USD
CY2017Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	77667000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	154625000	USD
CY2018Q1	us-gaap	Depreciation And Amortization DepreciationAndAmortization	89381000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	177755000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	154810000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	177755000	USD
CY2017Q3	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	0	USD
CY2018Q1	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	0	USD
CY2017Q3	us-gaap	Derivative Assets DerivativeAssets	3239000	USD
CY2018Q1	us-gaap	Derivative Assets DerivativeAssets	602000	USD
CY2017Q3	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2018Q1	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3239000	USD
CY2018Q1	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	602000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	112398000	USD
CY2018Q1	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	86944000	USD
CY2017Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	112398000	USD
CY2018Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	86944000	USD
CY2017Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2018Q1	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2017Q3	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	0	USD
CY2018Q1	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	0	USD
	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	12931000	USD
	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	USD
CY2017Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	2716000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	2716000	USD
CY2018Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2017	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerDilutedShare	0.03
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	10994000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	0	USD
CY2017Q1	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic And Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicAndDilutedShare	0.03
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic And Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicAndDilutedShare	0.13
CY2018Q1	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic And Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicAndDilutedShare	0.00
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic And Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicAndDilutedShare	0.00
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	6841000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	10215000	USD
CY2018Q1	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	0	USD
CY2017Q1	us-gaap	Disposal Group Including Discontinued Operation Consideration DisposalGroupIncludingDiscontinuedOperationConsideration	147300000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.55
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	2.74
CY2018Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.60
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	4.47
CY2017Q3	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	184653000	USD
CY2018Q1	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	89265000	USD
	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	10579000	USD
	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	0	USD
CY2017Q3	us-gaap	Goodwill Goodwill	730132000	USD
CY2018Q1	us-gaap	Goodwill Goodwill	730132000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	162012000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	276050000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	178992000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	493124000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	259061000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	436955000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	241431000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	449448000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	1.52
	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	2.61
CY2018Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	1.60
	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	4.47
CY2017Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2716000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	26944000	USD
	us-gaap	Interest Expense InterestExpense	57974000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	27304000	USD
	us-gaap	Interest Expense InterestExpense	58813000	USD
CY2017Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-100000	USD
CY2018Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	-600000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	13710000	USD
CY2018Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	97049000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	160905000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	62439000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-43676000	USD
	us-gaap	Increase Decrease In Commodity Contract Assets And Liabilities IncreaseDecreaseInCommodityContractAssetsAndLiabilities	-26757000	USD
	us-gaap	Increase Decrease In Commodity Contract Assets And Liabilities IncreaseDecreaseInCommodityContractAssetsAndLiabilities	-812000	USD
	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	54862000	USD
	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-117076000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10749596000	USD
CY2018Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	11356322000	USD
CY2017Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1013443000	USD
CY2018Q1	us-gaap	Liabilities Current LiabilitiesCurrent	1349127000	USD
CY2018Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1500000000	USD
CY2017Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2017Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2018Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	450000000	USD
CY2018Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	450000000	USD
CY2017Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3067045000	USD
CY2018Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2617892000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-37464000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-18558000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-516670000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-688144000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	552003000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	751367000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	164728000	USD
	us-gaap	Net Income Loss NetIncomeLoss	289760000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	178992000	USD
	us-gaap	Net Income Loss NetIncomeLoss	493124000	USD
CY2018Q1	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	8	state
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	285172000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	495090000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	268988000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	510549000	USD
CY2017Q3	us-gaap	Other Assets Current OtherAssetsCurrent	106321000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	55263000	USD
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	242125000	USD
CY2017Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	220636000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1530000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	702000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-939000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1046000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	4230000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	100426000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	22244000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	21289000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5760000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	101128000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	21305000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	20243000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	879000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	403000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-276000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-338000	USD
CY2017Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	332648000	USD
CY2018Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	538702000	USD
CY2017Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	175735000	USD
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	100929000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-10391000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-12252000	USD
CY2017Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	833000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-161000	USD
CY2018Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-253000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2288000	USD
CY2017Q1	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	132239000	USD
	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	257177000	USD
CY2018Q1	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	161073000	USD
	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	290640000	USD
	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	8918000	USD
	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	1175000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-3787000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4009000	USD
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	0	USD
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	1518000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	95314000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	105891000	USD
	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	85714000	USD
	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	0	USD
CY2017Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	261423000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	559385000	USD
CY2018Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	310740000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	693978000	USD
CY2017Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	230588000	USD
CY2018Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	237448000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	49400000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	395092000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	125000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	16984000	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	11902000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-159204000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-318143000	USD
CY2017Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2042122000	USD
CY2018Q1	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	2142386000	USD
CY2017Q3	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	9259182000	USD
CY2018Q1	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	9761329000	USD
CY2017Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	11301304000	USD
CY2018Q1	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	11903715000	USD
CY2017Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	988186000	USD
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1768354000	USD
CY2018Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1219409000	USD
	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2108601000	USD
CY2017Q3	us-gaap	Regulatory Assets RegulatoryAssets	176798000	USD
CY2018Q1	us-gaap	Regulatory Assets RegulatoryAssets	121884000	USD
CY2017Q3	us-gaap	Regulatory Liabilities RegulatoryLiabilities	555657000	USD
CY2018Q1	us-gaap	Regulatory Liabilities RegulatoryLiabilities	1493007000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1467024000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1854257000	USD
CY2017Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	447745000	USD
CY2018Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	129602000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	3898666000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	4721346000	USD
CY2017Q1	us-gaap	Taxes Other TaxesOther	65614000	USD
	us-gaap	Taxes Other TaxesOther	122663000	USD
CY2018Q1	us-gaap	Taxes Other TaxesOther	73007000	USD
	us-gaap	Taxes Other TaxesOther	135780000	USD
CY2017Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	193000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	348000	USD
CY2018Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	161000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	459000	USD
CY2017Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	105935000	shares
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	105610000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	111706000	shares
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	110135000	shares
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Nature of Business</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Atmos Energy Corporation (“Atmos Energy” or the “Company”) is engaged in the regulated natural gas distribution and pipeline and storage businesses. Our distribution business is subject to federal and state regulation and/or regulation by local authorities in each of the states in which our regulated divisions and subsidiaries operate.</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our distribution business delivers natural gas through sales and transportation arrangements to over </font><font style="font-family:inherit;font-size:10pt;">three million</font><font style="font-family:inherit;font-size:10pt;"> residential, commercial, public authority and industrial customers through our </font><font style="font-family:inherit;font-size:10pt;">six</font><font style="font-family:inherit;font-size:10pt;"> regulated distribution divisions, which at </font><font style="font-family:inherit;font-size:10pt;">March 31, 2018</font><font style="font-family:inherit;font-size:10pt;">, covered service areas located in </font><font style="font-family:inherit;font-size:10pt;">eight</font><font style="font-family:inherit;font-size:10pt;"> states. </font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our pipeline and storage business, which is also subject to federal and state regulations, includes the transportation of natural gas to our Texas and Louisiana distribution systems and the management of our underground storage facilities used to support our distribution business in various states.</font></div></div>

Files In Submission

Name	View Source	Status
0000731802-18-000020-index-headers.html	Edgar Link	pending
0000731802-18-000020-index.html	Edgar Link	pending
0000731802-18-000020.txt	Edgar Link	pending
0000731802-18-000020-xbrl.zip	Edgar Link	pending
ato-20180331.xml	Edgar Link	completed
ato-20180331.xsd	Edgar Link	pending
ato-20180331_cal.xml	Edgar Link	unprocessable
ato-20180331_def.xml	Edgar Link	unprocessable
ato-20180331_lab.xml	Edgar Link	unprocessable
ato-20180331_pre.xml	Edgar Link	unprocessable
ato201833110-q.htm	Edgar Link	pending
ato2018331ex-12.htm	Edgar Link	pending
ato2018331ex-15.htm	Edgar Link	pending
ato2018331ex-31.htm	Edgar Link	pending
ato2018331ex-32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
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$ATO
ATMOS ENERGY CORP Stock $ato

2018 Q1 Form 10-Q Financial Statement

#000073180218000020 Filed on May 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATO ATMOS ENERGY CORP Stock $ato

2018 Q1 Form 10-Q Financial Statement

#000073180218000020 Filed on May 02, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ATO
ATMOS ENERGY CORP Stock $ato