10-K Filing

QUESTAR CORP CIK: 751652 FY 2015

Filing Information

Form Type	10-K
Accession Number	`0000751652-16-000260`
Period End Date	20151231
Filing Date	20160218
Fiscal Year	2015
Fiscal Period	FY
XBRL Instance	str-20151231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 116 Income Statement 119 Cash Flow Statement 121 Stockholders Equity 40 Comprehensive Income 35

Balance Sheet 116 line items

Line Item	Tag	Value	Unit	Period
Common Stock, No Par Value	`CommonStockNoParValue`	-	USD	Point-in-time
Common Stock, No Par Value	`CommonStockNoParValue`	-	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$25.00M	USD	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.80M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.00M	USD	Point-in-time
Common Stock, Shares Outstanding	`CommonStockSharesOutstanding`	175.40M	shares	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$89.60M	USD	Point-in-time
Common Stock, Shares Outstanding	`CommonStockSharesOutstanding`	175.00M	shares	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$106.70M	USD	Point-in-time
Unbilled gas accounts receivable	`UnbilledContractsReceivable`	$93.70M	USD	Point-in-time
Unbilled gas accounts receivable	`UnbilledContractsReceivable`	$91.30M	USD	Point-in-time
Federal income taxes receivable	`IncomeTaxesReceivable`	$61.30M	USD	Point-in-time
Federal income taxes receivable	`IncomeTaxesReceivable`	$28.50M	USD	Point-in-time
Gas stored underground	`EnergyRelatedInventoryGasStoredUnderground`	$43.70M	USD	Point-in-time
Gas stored underground	`EnergyRelatedInventoryGasStoredUnderground`	$45.10M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$28.40M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$30.40M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$79.60M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$70.00M	USD	Point-in-time
Prepaid expenses and other	`PrepaidExpenseCurrent`	$11.20M	USD	Point-in-time
Prepaid expenses and other	`PrepaidExpenseCurrent`	$12.30M	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$440.10M	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$408.70M	USD	Point-in-time
Distribution property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentDistribution`	$2.35B	USD	Point-in-time
Distribution property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentDistribution`	$2.57B	USD	Point-in-time
Gas and oil property, plant and equipment, successful efforts method	`CapitalizedCostsOilAndGasProducingActivitiesGross`	$1.69B	USD	Point-in-time
Gas and oil property, plant and equipment, successful efforts method	`CapitalizedCostsOilAndGasProducingActivitiesGross`	$1.65B	USD	Point-in-time
Transportation property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentTransmission`	$1.83B	USD	Point-in-time
Transportation property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentTransmission`	$1.85B	USD	Point-in-time
Other property, plant and equipment	`PropertyPlantAndEquipmentOther`	$93.10M	USD	Point-in-time
Other property, plant and equipment	`PropertyPlantAndEquipmentOther`	$106.20M	USD	Point-in-time
Total Property, Plant and Equipment	`PropertyPlantAndEquipmentGross`	$5.96B	USD	Point-in-time
Total Property, Plant and Equipment	`PropertyPlantAndEquipmentGross`	$6.18B	USD	Point-in-time
Distribution accumulated depreciation and amortization	`DistributionAccumulatedDepreciationAndAmortization`	$812.20M	USD	Point-in-time
Distribution accumulated depreciation and amortization	`DistributionAccumulatedDepreciationAndAmortization`	$780.30M	USD	Point-in-time
Cost-of-service gas and oil accumulated depreciation, depletion and amortization	`CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities`	$789.90M	USD	Point-in-time
Cost-of-service gas and oil accumulated depreciation, depletion and amortization	`CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities`	$757.30M	USD	Point-in-time
Transportation accumulated depreciation and amortization	`TransportationAccumulatedDepreciationAndAmortization`	$673.90M	USD	Point-in-time
Transportation accumulated depreciation and amortization	`TransportationAccumulatedDepreciationAndAmortization`	$709.70M	USD	Point-in-time
Other accumulated depreciation and amortization	`OtherAccumulatedDepreciationAndAmortization`	$21.50M	USD	Point-in-time
Other accumulated depreciation and amortization	`OtherAccumulatedDepreciationAndAmortization`	$14.50M	USD	Point-in-time
Total accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$2.23B	USD	Point-in-time
Total accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$2.33B	USD	Point-in-time
Net Property, Plant and Equipment	`PropertyPlantAndEquipmentNet`	$3.85B	USD	Point-in-time
Net Property, Plant and Equipment	`PropertyPlantAndEquipmentNet`	$3.74B	USD	Point-in-time
Investment in unconsolidated affiliate	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$24.70M	USD	Point-in-time
Investment in unconsolidated affiliate	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$23.90M	USD	Point-in-time
Goodwill	`Goodwill`	$9.80M	USD	Point-in-time
Goodwill	`Goodwill`	$9.80M	USD	Point-in-time
Goodwill	`Goodwill`	$9.80M	USD	Point-in-time
Noncurrent regulatory assets	`RegulatoryAssetsNoncurrent`	$25.00M	USD	Point-in-time
Noncurrent regulatory assets	`RegulatoryAssetsNoncurrent`	$14.90M	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$40.20M	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$40.40M	USD	Point-in-time
Total Other Assets	`OtherAssets`	$65.10M	USD	Point-in-time
Total Other Assets	`OtherAssets`	$75.00M	USD	Point-in-time
TOTAL ASSETS	`Assets`	$4.38B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$4.24B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$4.04B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$457.60M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$347.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$113.70M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$116.00M	USD	Point-in-time
Accrued expenses and other	`AccruedLiabilitiesCurrentAndNoncurrent`	$42.30M	USD	Point-in-time
Accrued expenses and other	`AccruedLiabilitiesCurrentAndNoncurrent`	$39.10M	USD	Point-in-time
Production and other taxes	`TaxesPayableCurrent`	$26.10M	USD	Point-in-time
Production and other taxes	`TaxesPayableCurrent`	$35.50M	USD	Point-in-time
Customer advances	`CustomerAdvancesCurrent`	$29.40M	USD	Point-in-time
Customer advances	`CustomerAdvancesCurrent`	$34.30M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$6.40M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$13.40M	USD	Point-in-time
Interest payable	`InterestPayableCurrent`	$11.70M	USD	Point-in-time
Interest payable	`InterestPayableCurrent`	$11.60M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	$25.10M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	$250.20M	USD	Point-in-time
Current portion of capital lease obligation	`CapitalLeaseObligationsCurrent`	$1.20M	USD	Point-in-time
Current portion of capital lease obligation	`CapitalLeaseObligationsCurrent`	$1.00M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$621.40M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$940.20M	USD	Point-in-time
Long-term debt, less current portion	`LongTermDebtNoncurrent`	$1.22B	USD	Point-in-time
Long-term debt, less current portion	`LongTermDebtNoncurrent`	$968.10M	USD	Point-in-time
Capital lease obligation, less current portion	`CapitalLeaseObligationsNoncurrent`	$36.00M	USD	Point-in-time
Capital lease obligation, less current portion	`CapitalLeaseObligationsNoncurrent`	$37.40M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$779.50M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$709.80M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$67.70M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$67.60M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$69.30M	USD	Point-in-time
Defined benefit pension plan	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$141.90M	USD	Point-in-time
Defined benefit pension plan	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$81.10M	USD	Point-in-time
Other postretirement benefits	`OtherPostretirementBenefitsPayableNoncurrent`	$41.90M	USD	Point-in-time
Other postretirement benefits	`OtherPostretirementBenefitsPayableNoncurrent`	$43.80M	USD	Point-in-time
Noncurrent regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$69.90M	USD	Point-in-time
Noncurrent regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$75.60M	USD	Point-in-time
Customer contributions in aid of construction	`ContributionsInAidOfConstruction`	$29.20M	USD	Point-in-time
Customer contributions in aid of construction	`ContributionsInAidOfConstruction`	$23.70M	USD	Point-in-time
Other noncurrent liabilities	`OtherLiabilitiesNoncurrent`	$54.90M	USD	Point-in-time
Other noncurrent liabilities	`OtherLiabilitiesNoncurrent`	$49.00M	USD	Point-in-time
Commitments and contingencies - Note 10	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies - Note 10	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$476.80M	USD	Point-in-time
Common stock	`CommonStockValue`	$469.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.03B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$970.70M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-201.30M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-185.30M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-141.80M	USD	Point-in-time
Total Common Shareholders' Equity	`StockholdersEquity`	$1.32B	USD	Point-in-time
Total Common Shareholders' Equity	`StockholdersEquity`	$1.20B	USD	Point-in-time
Total Common Shareholders' Equity	`StockholdersEquity`	$1.25B	USD	Point-in-time
Total Common Shareholders' Equity	`StockholdersEquity`	$1.04B	USD	Point-in-time
TOTAL LIABILITIES AND COMMON SHAREHOLDERS' EQUITY	`LiabilitiesAndStockholdersEquity`	$4.38B	USD	Point-in-time
TOTAL LIABILITIES AND COMMON SHAREHOLDERS' EQUITY	`LiabilitiesAndStockholdersEquity`	$4.24B	USD	Point-in-time

Income Statement 119 line items

Line Item	Tag	Value	Unit	Period
Questar Gas / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueDistribution`	$985.20M	USD	Annual
Questar Gas / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueDistribution`	$960.90M	USD	Annual
Questar Gas / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueDistribution`	$917.60M	USD	Annual
Wexpro	`NaturalGasProductionRevenue`	$22.90M	USD	Annual
Wexpro	`NaturalGasProductionRevenue`	$35.60M	USD	Annual
Wexpro	`NaturalGasProductionRevenue`	$45.10M	USD	Annual
Questar Pipeline / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueTransmission`	$189.50M	USD	Annual
Questar Pipeline / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueTransmission`	$190.20M	USD	Annual
Questar Pipeline / Revenues from unaffiliated customers	`GasDomesticRegulatedRevenueTransmission`	$187.90M	USD	Annual
Other	`OtherSalesRevenueNet`	$200.00K	USD	Annual
Other	`OtherSalesRevenueNet`	$2.60M	USD	Annual
Other	`OtherSalesRevenueNet`	$6.50M	USD	Annual
Total Revenues	`Revenues`	$201.30M	USD	1 Quarter
Total Revenues	`Revenues`	$373.20M	USD	1 Quarter
Total Revenues	`Revenues`	$456.90M	USD	1 Quarter
Total Revenues	`Revenues`	$1.19B	USD	Annual
Total Revenues	`Revenues`	$142.30M	USD	1 Quarter
Total Revenues	`Revenues`	$1.13B	USD	Annual
Total Revenues	`Revenues`	$199.30M	USD	1 Quarter
Total Revenues	`Revenues`	$157.90M	USD	1 Quarter
Total Revenues	`Revenues`	$364.70M	USD	1 Quarter
Total Revenues	`Revenues`	$1.22B	USD	Annual
Total Revenues	`Revenues`	$428.60M	USD	1 Quarter
Cost of sales (excluding operating expenses shown separately)	`CostOfGoodsSoldOilAndGas`	$175.20M	USD	Annual
Cost of sales (excluding operating expenses shown separately)	`CostOfGoodsSoldOilAndGas`	$285.90M	USD	Annual
Cost of sales (excluding operating expenses shown separately)	`CostOfGoodsSoldOilAndGas`	$186.30M	USD	Annual
Operating and maintenance	`CostOfPropertyRepairsAndMaintenance`	$181.60M	USD	Annual
Operating and maintenance	`CostOfPropertyRepairsAndMaintenance`	$179.40M	USD	Annual
Operating and maintenance	`CostOfPropertyRepairsAndMaintenance`	$194.20M	USD	Annual
General and administrative	`GeneralAndAdministrativeExpense`	$122.70M	USD	Annual
General and administrative	`GeneralAndAdministrativeExpense`	$115.90M	USD	Annual
General and administrative	`GeneralAndAdministrativeExpense`	$109.00M	USD	Annual
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	-	USD	Annual
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	-	USD	Annual
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	-	USD	1 Quarter
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	-	USD	1 Quarter
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	-	USD	1 Quarter
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	$-16.70M	USD	1 Quarter
Pension settlement costs	`DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1`	$-16.70M	USD	Annual
Production and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$57.40M	USD	Annual
Production and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$51.30M	USD	Annual
Production and other taxes	`TaxesExcludingIncomeAndExciseTaxes`	$66.20M	USD	Annual
Depreciation, depletion and amortization	`DepreciationAndAmortization`	$194.80M	USD	Annual
Depreciation, depletion and amortization	`DepreciationAndAmortization`	$213.70M	USD	Annual
Depreciation, depletion and amortization	`DepreciationAndAmortization`	$216.00M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$12.50M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$2.00M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$80.60M	USD	Annual
Total Operating Expenses	`OperatingExpenses`	$914.00M	USD	Annual
Total Operating Expenses	`OperatingExpenses`	$762.30M	USD	Annual
Total Operating Expenses	`OperatingExpenses`	$785.10M	USD	Annual
Net gain (loss) from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$1.80M	USD	Annual
Net gain (loss) from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$-200.00K	USD	Annual
Net gain (loss) from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$1.20M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$148.30M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$111.70M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$405.40M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$62.30M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$89.80M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$305.80M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$76.50M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$68.90M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$374.40M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$75.30M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$147.00M	USD	1 Quarter
Interest and other income	`InvestmentIncomeNonoperating`	$6.60M	USD	Annual
Interest and other income	`InvestmentIncomeNonoperating`	$4.20M	USD	Annual
Interest and other income	`InvestmentIncomeNonoperating`	$9.90M	USD	Annual
Income from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.70M	USD	Annual
Income from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.70M	USD	Annual
Income from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.50M	USD	Annual
Interest expense	`InterestExpense`	$63.10M	USD	Annual
Interest expense	`InterestExpense`	$63.00M	USD	Annual
Interest expense	`InterestExpense`	$56.90M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$262.50M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$352.40M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$319.30M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$125.90M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$110.60M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$101.30M	USD	Annual
NET INCOME	`NetIncomeLoss`	$84.60M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$50.90M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$208.70M	USD	Annual
NET INCOME	`NetIncomeLoss`	$40.30M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$40.60M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$32.60M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$38.60M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$226.50M	USD	Annual
NET INCOME	`NetIncomeLoss`	$85.10M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$62.50M	USD	1 Quarter
NET INCOME	`NetIncomeLoss`	$161.20M	USD	Annual
Basic	`EarningsPerShareBasic`	$0.92	USD	Annual
Basic	`EarningsPerShareBasic`	$1.29	USD	Annual
Basic	`EarningsPerShareBasic`	$0.18	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.29	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.22	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.23	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.23	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.36	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.48	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.48	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$1.18	USD	Annual
Diluted	`EarningsPerShareDiluted`	$1.29	USD	Annual
Diluted	`EarningsPerShareDiluted`	$0.18	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.35	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.23	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.48	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.22	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.92	USD	Annual
Diluted	`EarningsPerShareDiluted`	$0.23	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$1.18	USD	Annual
Diluted	`EarningsPerShareDiluted`	$0.29	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.48	USD	1 Quarter
Used in basic calculation	`WeightedAverageNumberOfSharesOutstandingBasic`	175.80M	shares	Annual
Used in basic calculation	`WeightedAverageNumberOfSharesOutstandingBasic`	176.10M	shares	Annual
Used in basic calculation	`WeightedAverageNumberOfSharesOutstandingBasic`	175.40M	shares	Annual
Used in diluted calculation	`WeightedAverageNumberOfDilutedSharesOutstanding`	176.30M	shares	Annual
Used in diluted calculation	`WeightedAverageNumberOfDilutedSharesOutstanding`	176.00M	shares	Annual
Used in diluted calculation	`WeightedAverageNumberOfDilutedSharesOutstanding`	176.10M	shares	Annual

Cash Flow Statement 121 line items

Line Item	Tag	Value	Unit	Period
Net income	`NetIncomeLoss`	$161.20M	USD	Annual
Net income	`NetIncomeLoss`	$85.10M	USD	1 Quarter
Net income	`NetIncomeLoss`	$226.50M	USD	Annual
Net income	`NetIncomeLoss`	$38.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$62.50M	USD	1 Quarter
Net income	`NetIncomeLoss`	$40.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$40.30M	USD	1 Quarter
Net income	`NetIncomeLoss`	$208.70M	USD	Annual
Net income	`NetIncomeLoss`	$50.90M	USD	1 Quarter
Net income	`NetIncomeLoss`	$32.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$84.60M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$234.40M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$201.80M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$223.50M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$59.50M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$42.40M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$49.20M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$12.50M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$2.00M	USD	Annual
Abandonment and impairment	`AssetImpairmentCharges`	$80.60M	USD	Annual
Share-based compensation	`ShareBasedCompensation`	$11.40M	USD	Annual
Share-based compensation	`ShareBasedCompensation`	$10.20M	USD	Annual
Share-based compensation	`ShareBasedCompensation`	$12.40M	USD	Annual
Net (gain) loss from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$-200.00K	USD	Annual
Net (gain) loss from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$1.20M	USD	Annual
Net (gain) loss from asset sales	`GainLossOnSaleOfPropertyPlantEquipment`	$1.80M	USD	Annual
(Income) from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.50M	USD	Annual
(Income) from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.70M	USD	Annual
(Income) from unconsolidated affiliate	`IncomeLossFromEquityMethodInvestments`	$3.70M	USD	Annual
Distributions from unconsolidated affiliate	`EquityMethodInvestmentDividendsOrDistributions`	$4.60M	USD	Annual
Distributions from unconsolidated affiliate	`EquityMethodInvestmentDividendsOrDistributions`	$4.40M	USD	Annual
Distributions from unconsolidated affiliate	`EquityMethodInvestmentDividendsOrDistributions`	$4.50M	USD	Annual
Other operating	`OtherNoncashIncomeExpense`	$-900.00K	USD	Annual
Other operating	`OtherNoncashIncomeExpense`	$-900.00K	USD	Annual
Other operating	`OtherNoncashIncomeExpense`	$-1.10M	USD	Annual
Accounts receivable, including unbilled gas sales	`IncreaseDecreaseInAccountsReceivable`	$-29.50M	USD	Annual
Accounts receivable, including unbilled gas sales	`IncreaseDecreaseInAccountsReceivable`	$41.50M	USD	Annual
Accounts receivable, including unbilled gas sales	`IncreaseDecreaseInAccountsReceivable`	$11.40M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$10.40M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-600.00K	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$200.00K	USD	Annual
Prepaid expenses and other	`IncreaseDecreaseInPrepaidExpense`	$1.70M	USD	Annual
Prepaid expenses and other	`IncreaseDecreaseInPrepaidExpense`	$-3.60M	USD	Annual
Prepaid expenses and other	`IncreaseDecreaseInPrepaidExpense`	$1.10M	USD	Annual
Accounts payable, accrued expenses and other	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-15.10M	USD	Annual
Accounts payable, accrued expenses and other	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-19.60M	USD	Annual
Accounts payable, accrued expenses and other	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$33.70M	USD	Annual
Federal income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$-24.00M	USD	Annual
Federal income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$-32.80M	USD	Annual
Federal income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$6.20M	USD	Annual
Current regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-19.20M	USD	Annual
Current regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$44.50M	USD	Annual
Current regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-2.60M	USD	Annual
Noncurrent regulatory and other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$17.10M	USD	Annual
Noncurrent regulatory and other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$10.80M	USD	Annual
Noncurrent regulatory and other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$47.10M	USD	Annual
NET CASH PROVIDED BY OPERATING ACTIVITIES	`NetCashProvidedByUsedInOperatingActivities`	$443.60M	USD	Annual
NET CASH PROVIDED BY OPERATING ACTIVITIES	`NetCashProvidedByUsedInOperatingActivities`	$411.40M	USD	Annual
NET CASH PROVIDED BY OPERATING ACTIVITIES	`NetCashProvidedByUsedInOperatingActivities`	$502.10M	USD	Annual
Property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$319.10M	USD	Annual
Property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$306.80M	USD	Annual
Property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$399.40M	USD	Annual
Wexpro acquisition of producing properties	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$104.30M	USD	Annual
Wexpro acquisition of producing properties	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$52.40M	USD	Annual
Wexpro acquisition of producing properties	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$12.20M	USD	Annual
Questar Gas acquisition	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	-	USD	Annual
Questar Gas acquisition	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	-	USD	Annual
Questar Gas acquisition	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	$11.40M	USD	Annual
Cash used in disposition of assets	`PaymentsForProceedsFromRemovalCosts`	$4.90M	USD	Annual
Cash used in disposition of assets	`PaymentsForProceedsFromRemovalCosts`	$6.20M	USD	Annual
Cash used in disposition of assets	`PaymentsForProceedsFromRemovalCosts`	$4.80M	USD	Annual
Proceeds from disposition of assets	`ProceedsFromSaleOfProductiveAssets`	$1.10M	USD	Annual
Proceeds from disposition of assets	`ProceedsFromSaleOfProductiveAssets`	$9.50M	USD	Annual
Proceeds from disposition of assets	`ProceedsFromSaleOfProductiveAssets`	$600.00K	USD	Annual
NET CASH USED IN INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-508.00M	USD	Annual
NET CASH USED IN INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-335.50M	USD	Annual
NET CASH USED IN INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-366.80M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$3.50M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$2.90M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$2.30M	USD	Annual
Common stock repurchased	`PaymentsForRepurchaseOfCommonStock`	$4.20M	USD	Annual
Common stock repurchased	`PaymentsForRepurchaseOfCommonStock`	$4.10M	USD	Annual
Common stock repurchased	`PaymentsForRepurchaseOfCommonStock`	$23.30M	USD	Annual
Long-term debt issued, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	$147.30M	USD	Annual
Long-term debt issued, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Long-term debt issued, net of issuance costs	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Long-term debt repaid	`RepaymentsOfLongTermDebt`	-	USD	Annual
Long-term debt repaid	`RepaymentsOfLongTermDebt`	$42.00M	USD	Annual
Long-term debt repaid	`RepaymentsOfLongTermDebt`	$25.10M	USD	Annual
Capital lease obligation repaid	`RepaymentsOfLongTermCapitalLeaseObligations`	$900.00K	USD	Annual
Capital lease obligation repaid	`RepaymentsOfLongTermCapitalLeaseObligations`	$700.00K	USD	Annual
Capital lease obligation repaid	`RepaymentsOfLongTermCapitalLeaseObligations`	$1.20M	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$110.60M	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$71.00M	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$13.00M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$124.60M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$131.90M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$148.00M	USD	Annual
Tax benefits from share-based compensation	`ExcessTaxBenefitFromShareBasedCompensationFinancingActivities`	$14.00M	USD	Annual
Tax benefits from share-based compensation	`ExcessTaxBenefitFromShareBasedCompensationFinancingActivities`	$600.00K	USD	Annual
Tax benefits from share-based compensation	`ExcessTaxBenefitFromShareBasedCompensationFinancingActivities`	$2.20M	USD	Annual
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$5.10M	USD	Annual
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$-60.80M	USD	Annual
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$-82.90M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-7.00M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$16.00M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-800.00K	USD	Annual
Beginning cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.00M	USD	Point-in-time
Beginning cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$25.00M	USD	Point-in-time
Beginning cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.80M	USD	Point-in-time
Beginning cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.00M	USD	Point-in-time
Ending cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.00M	USD	Point-in-time
Ending cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$25.00M	USD	Point-in-time
Ending cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$16.80M	USD	Point-in-time
Ending cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.00M	USD	Point-in-time
Interest	`InterestPaidNet`	$62.00M	USD	Annual
Interest	`InterestPaidNet`	$61.30M	USD	Annual
Interest	`InterestPaidNet`	$55.80M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$97.40M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$33.60M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$89.00M	USD	Annual

Stockholders Equity 40 line items

Line Item	Tag	Value	Unit	Period
Dividends paid per common share	`CommonStockDividendsPerShareCashPaid`	$0.71	USD	Annual
Dividends paid per common share	`CommonStockDividendsPerShareCashPaid`	$0.84	USD	Annual
Dividends paid per common share	`CommonStockDividendsPerShareCashPaid`	$0.75	USD	Annual
Beginning balances	`StockholdersEquity`	$1.32B	USD	Point-in-time
Beginning balances	`StockholdersEquity`	$1.20B	USD	Point-in-time
Beginning balances	`StockholdersEquity`	$1.25B	USD	Point-in-time
Beginning balances	`StockholdersEquity`	$1.04B	USD	Point-in-time
Common stock issued	`StockIssuedDuringPeriodValueNewIssues`	$3.50M	USD	Annual
Common stock issued	`StockIssuedDuringPeriodValueNewIssues`	$2.30M	USD	Annual
Common stock issued	`StockIssuedDuringPeriodValueNewIssues`	$2.90M	USD	Annual
Common stock repurchased	`StockRepurchasedDuringPeriodValue`	$23.30M	USD	Annual
Common stock repurchased	`StockRepurchasedDuringPeriodValue`	$4.10M	USD	Annual
Common stock repurchased	`StockRepurchasedDuringPeriodValue`	$4.20M	USD	Annual
Dividends paid	`DividendsCommonStockCash`	$124.60M	USD	Annual
Dividends paid	`DividendsCommonStockCash`	$148.00M	USD	Annual
Dividends paid	`DividendsCommonStockCash`	$131.90M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$11.30M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$10.00M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$11.40M	USD	Annual
Tax benefits from share-based compensation	`AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation`	$14.00M	USD	Annual
Tax benefits from share-based compensation	`AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation`	$2.20M	USD	Annual
Tax benefits from share-based compensation	`AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation`	$600.00K	USD	Annual
Net income	`NetIncomeLoss`	$50.90M	USD	1 Quarter
Net income	`NetIncomeLoss`	$161.20M	USD	Annual
Net income	`NetIncomeLoss`	$85.10M	USD	1 Quarter
Net income	`NetIncomeLoss`	$226.50M	USD	Annual
Net income	`NetIncomeLoss`	$38.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$62.50M	USD	1 Quarter
Net income	`NetIncomeLoss`	$40.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$40.30M	USD	1 Quarter
Net income	`NetIncomeLoss`	$208.70M	USD	Annual
Net income	`NetIncomeLoss`	$32.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$84.60M	USD	1 Quarter
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$104.50M	USD	Annual
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$16.00M	USD	Annual
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-59.50M	USD	Annual
Ending balances	`StockholdersEquity`	$1.20B	USD	Point-in-time
Ending balances	`StockholdersEquity`	$1.25B	USD	Point-in-time
Ending balances	`StockholdersEquity`	$1.32B	USD	Point-in-time
Ending balances	`StockholdersEquity`	$1.04B	USD	Point-in-time

Comprehensive Income 35 line items

Line Item	Tag	Value	Unit	Period
Net income	`NetIncomeLoss`	$161.20M	USD	Annual
Net income	`NetIncomeLoss`	$84.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$32.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$208.70M	USD	Annual
Net income	`NetIncomeLoss`	$40.30M	USD	1 Quarter
Net income	`NetIncomeLoss`	$50.90M	USD	1 Quarter
Net income	`NetIncomeLoss`	$62.50M	USD	1 Quarter
Net income	`NetIncomeLoss`	$38.60M	USD	1 Quarter
Net income	`NetIncomeLoss`	$226.50M	USD	Annual
Net income	`NetIncomeLoss`	$85.10M	USD	1 Quarter
Net income	`NetIncomeLoss`	$40.60M	USD	1 Quarter
Change in unrecognized actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-97.50M	USD	Annual
Change in unrecognized actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$167.70M	USD	Annual
Change in unrecognized actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$25.70M	USD	Annual
Change in unrecognized prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax`	$100.00K	USD	Annual
Change in unrecognized prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax`	$-600.00K	USD	Annual
Change in unrecognized prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax`	$-1.10M	USD	Annual
Interest rate cash flow hedge amortization	`OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateCashFlowHedgesBeforeTax`	$500.00K	USD	Annual
Interest rate cash flow hedge amortization	`OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateCashFlowHedgesBeforeTax`	$500.00K	USD	Annual
Interest rate cash flow hedge amortization	`OtherComprehensiveIncomeUnrealizedGainLossOnInterestRateCashFlowHedgesBeforeTax`	$600.00K	USD	Annual
Commodity cash flow hedge	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax`	-	USD	Annual
Commodity cash flow hedge	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax`	-	USD	Annual
Commodity cash flow hedge	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax`	$-200.00K	USD	Annual
Change in fair value of long-term investment	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax`	-	USD	Annual
Change in fair value of long-term investment	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax`	-	USD	Annual
Change in fair value of long-term investment	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax`	$-100.00K	USD	Annual
Income taxes	`OtherComprehensiveIncomeLossTaxPortionAttributableToParent1`	$10.00M	USD	Annual
Income taxes	`OtherComprehensiveIncomeLossTaxPortionAttributableToParent1`	$-36.90M	USD	Annual
Income taxes	`OtherComprehensiveIncomeLossTaxPortionAttributableToParent1`	$64.70M	USD	Annual
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-59.50M	USD	Annual
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$16.00M	USD	Annual
Net other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$104.50M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTax`	$265.70M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTax`	$167.00M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTax`	$224.70M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.