10-K Filing

PORTLAND GENERAL ELECTRIC CO /OR/ CIK: 784977 FY 2017

Filing Information

Form Type	10-K
Accession Number	`0000784977-18-000005`
Period End Date	20171231
Filing Date	20180216
Fiscal Year	2017
Fiscal Period	FY
XBRL Instance	por-20171231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 109 Income Statement 57 Cash Flow Statement 117 Stockholders Equity 29 Comprehensive Income 9

Balance Sheet 109 line items

Line Item	Tag	Value	Unit	Period
Preferred Stock, No Par Value	`PreferredStockNoParValue`	-	USD	Point-in-time
Preferred Stock, No Par Value	`PreferredStockNoParValue`	-	USD	Point-in-time
Preferred Stock, Shares Authorized	`PreferredStockSharesAuthorized`	30.00M	shares	Point-in-time
Preferred Stock, Shares Authorized	`PreferredStockSharesAuthorized`	30.00M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$127.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$4.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$6.00M	USD	Point-in-time
Preferred Stock, Shares Issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$168.00M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$155.00M	USD	Point-in-time
Preferred Stock, Shares Issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Preferred Stock, Shares Outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Preferred Stock, Shares Outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Unbilled revenues	`UnbilledRevenue`	$107.00M	USD	Point-in-time
Unbilled revenues	`UnbilledRevenue`	$106.00M	USD	Point-in-time
Common Stock, No Par Value	`CommonStockNoParValue`	-	USD	Point-in-time
Common Stock, No Par Value	`CommonStockNoParValue`	-	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$50.00M	USD	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	160.00M	shares	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	160.00M	shares	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$52.00M	USD	Point-in-time
Fuel	`EnergyRelatedInventory`	$32.00M	USD	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	89.11M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	88.95M	shares	Point-in-time
Fuel	`EnergyRelatedInventory`	$26.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	88.95M	shares	Point-in-time
Regulatory assets--current	`RegulatoryAssetsCurrent`	$62.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	89.11M	shares	Point-in-time
Regulatory assets--current	`RegulatoryAssetsCurrent`	$36.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$77.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$73.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$526.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$463.00M	USD	Point-in-time
Generation	`PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing`	$4.67B	USD	Point-in-time
Generation	`PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing`	$4.60B	USD	Point-in-time
Transmission	`PublicUtilitiesPropertyPlantAndEquipmentTransmission`	$547.00M	USD	Point-in-time
Transmission	`PublicUtilitiesPropertyPlantAndEquipmentTransmission`	$521.00M	USD	Point-in-time
Distribution	`PublicUtilitiesPropertyPlantAndEquipmentDistribution`	$3.34B	USD	Point-in-time
Distribution	`PublicUtilitiesPropertyPlantAndEquipmentDistribution`	$3.54B	USD	Point-in-time
General	`PublicUtilitiesPropertyPlantAndEquipmentGeneral`	$550.00M	USD	Point-in-time
General	`PublicUtilitiesPropertyPlantAndEquipmentGeneral`	$501.00M	USD	Point-in-time
Intangible	`PublicUtilitiesPropertyPlantAndEquipmentIntangible`	$572.00M	USD	Point-in-time
Intangible	`PublicUtilitiesPropertyPlantAndEquipmentIntangible`	$607.00M	USD	Point-in-time
Construction work-in-progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$213.00M	USD	Point-in-time
Construction work-in-progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$391.00M	USD	Point-in-time
Total electric utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$10.30B	USD	Point-in-time
Total electric utility plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$9.75B	USD	Point-in-time
Accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$3.56B	USD	Point-in-time
Accumulated depreciation and amortization	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$3.31B	USD	Point-in-time
Electric utility plant, net	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$6.74B	USD	Point-in-time
Electric utility plant, net	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$6.43B	USD	Point-in-time
Regulatory assets--noncurrent	`RegulatoryAssetsNoncurrent`	$498.00M	USD	Point-in-time
Regulatory assets--noncurrent	`RegulatoryAssetsNoncurrent`	$438.00M	USD	Point-in-time
Nuclear decommissioning trust	`DecommissioningTrustAssetsAmount`	$42.00M	USD	Point-in-time
Nuclear decommissioning trust	`DecommissioningTrustAssetsAmount`	$41.00M	USD	Point-in-time
Non-qualified benefit plan trust	`AssetsHeldInTrustNoncurrent`	$37.00M	USD	Point-in-time
Non-qualified benefit plan trust	`AssetsHeldInTrustNoncurrent`	$34.00M	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$57.00M	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$54.00M	USD	Point-in-time
Total assets	`Assets`	$7.53B	USD	Point-in-time
Total assets	`Assets`	$7.84B	USD	Point-in-time
Accounts payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$129.00M	USD	Point-in-time
Accounts payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$132.00M	USD	Point-in-time
Liabilities from price risk management activities-current	`DerivativeLiabilitiesCurrent`	$44.00M	USD	Point-in-time
Liabilities from price risk management activities-current	`DerivativeLiabilitiesCurrent`	$59.00M	USD	Point-in-time
Short-term debt	`CommercialPaper`	-	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	$150.00M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	-	USD	Point-in-time
Accrued expenses and other current liabilities	`OtherLiabilitiesCurrent`	$241.00M	USD	Point-in-time
Accrued expenses and other current liabilities	`OtherLiabilitiesCurrent`	$254.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$577.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$432.00M	USD	Point-in-time
Long-term debt, net of current portion	`LongTermDebtNoncurrent`	$2.20B	USD	Point-in-time
Long-term debt, net of current portion	`LongTermDebtNoncurrent`	$2.43B	USD	Point-in-time
Regulatory liabilities--noncurrent	`RegulatoryLiabilityNoncurrent`	$958.00M	USD	Point-in-time
Regulatory liabilities--noncurrent	`RegulatoryLiabilityNoncurrent`	$1.29B	USD	Point-in-time
Deferred income taxes	`DeferredTaxLiabilitiesNoncurrent`	$669.00M	USD	Point-in-time
Deferred income taxes	`DeferredTaxLiabilitiesNoncurrent`	$376.00M	USD	Point-in-time
Unfunded status of pension and postretirement plans	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$281.00M	USD	Point-in-time
Unfunded status of pension and postretirement plans	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$284.00M	USD	Point-in-time
Liabilities from price risk management activities--noncurrent	`DerivativeLiabilitiesNoncurrent`	$151.00M	USD	Point-in-time
Liabilities from price risk management activities--noncurrent	`DerivativeLiabilitiesNoncurrent`	$125.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligation`	$151.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligation`	$161.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligation`	$116.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligation`	$167.00M	USD	Point-in-time
Non-qualified benefit plan liabilities	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$106.00M	USD	Point-in-time
Non-qualified benefit plan liabilities	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$105.00M	USD	Point-in-time
Other noncurrent liabilities	`OtherLiabilitiesNoncurrent`	$192.00M	USD	Point-in-time
Other noncurrent liabilities	`OtherLiabilitiesNoncurrent`	$107.00M	USD	Point-in-time
Total liabilities	`Liabilities`	$5.18B	USD	Point-in-time
Total liabilities	`Liabilities`	$5.42B	USD	Point-in-time
Commitments and Contingencies (see notes)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies (see notes)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Common stock, no par value, 160,000,000 shares authorized; 89,114,265 and 88,946,704 shares issued and outstanding as of December 31, 2017 and 2016, respectively	`CommonStockValue`	$1.21B	USD	Point-in-time
Common stock, no par value, 160,000,000 shares authorized; 89,114,265 and 88,946,704 shares issued and outstanding as of December 31, 2017 and 2016, respectively	`CommonStockValue`	$1.20B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-8.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-7.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.15B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.22B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.26B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.91B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.34B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.42B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$7.53B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$7.84B	USD	Point-in-time

Income Statement 57 line items

Line Item	Tag	Value	Unit	Period
Revenues, net	`ElectricUtilityRevenue`	$2.01B	USD	Annual
Revenues, net	`ElectricUtilityRevenue`	$1.90B	USD	Annual
Revenues, net	`ElectricUtilityRevenue`	$1.92B	USD	Annual
Purchased power and fuel	`CostOfPurchasedPower`	$661.00M	USD	Annual
Purchased power and fuel	`CostOfPurchasedPower`	$617.00M	USD	Annual
Purchased power and fuel	`CostOfPurchasedPower`	$592.00M	USD	Annual
Generation, transmission and distribution	`ElectricProductionExpense`	$309.00M	USD	Annual
Generation, transmission and distribution	`ElectricProductionExpense`	$286.00M	USD	Annual
Generation, transmission and distribution	`ElectricProductionExpense`	$266.00M	USD	Annual
Administrative and other	`GeneralAndAdministrativeExpense`	$264.00M	USD	Annual
Administrative and other	`GeneralAndAdministrativeExpense`	$241.00M	USD	Annual
Administrative and other	`GeneralAndAdministrativeExpense`	$247.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$321.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$345.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$305.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$116.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$123.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$119.00M	USD	Annual
Total operating expenses	`CostsAndExpenses`	$1.63B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$1.59B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$1.59B	USD	Annual
Income from operations	`OperatingIncomeLoss`	$333.00M	USD	Annual
Income from operations	`OperatingIncomeLoss`	$309.00M	USD	Annual
Income from operations	`OperatingIncomeLoss`	$376.00M	USD	Annual
Interest expense, net	`InterestExpense`	$120.00M	USD	Annual
Interest expense, net	`InterestExpense`	$114.00M	USD	Annual
Interest expense, net	`InterestExpense`	$112.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$12.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$21.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$21.00M	USD	Annual
Miscellaneous income, net	`OtherNonoperatingIncomeExpense`	$5.00M	USD	Annual
Miscellaneous income, net	`OtherNonoperatingIncomeExpense`	$1.00M	USD	Annual
Miscellaneous income, net	`OtherNonoperatingIncomeExpense`	$1.00M	USD	Annual
Other income, net	`NonoperatingIncomeExpense`	$17.00M	USD	Annual
Other income, net	`NonoperatingIncomeExpense`	$22.00M	USD	Annual
Other income, net	`NonoperatingIncomeExpense`	$22.00M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$217.00M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$273.00M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$243.00M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$50.00M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$86.00M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$45.00M	USD	Annual
Net income	`ProfitLoss`	$193.00M	USD	Annual
Net income	`ProfitLoss`	$187.00M	USD	Annual
Net income	`ProfitLoss`	$172.00M	USD	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	88.90M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	84.18M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	89.06M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	89.05M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	84.34M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	89.18M	shares	Annual
Basic	`EarningsPerShareBasic`	$2.17	USD	Annual
Basic	`EarningsPerShareBasic`	$2.05	USD	Annual
Basic	`EarningsPerShareBasic`	$2.10	USD	Annual
Diluted	`EarningsPerShareDiluted`	$2.10	USD	Annual
Diluted	`EarningsPerShareDiluted`	$2.16	USD	Annual
Diluted	`EarningsPerShareDiluted`	$2.04	USD	Annual

Cash Flow Statement 117 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$193.00M	USD	Annual
Net income	`ProfitLoss`	$187.00M	USD	Annual
Net income	`ProfitLoss`	$172.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$321.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$345.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$305.00M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$70.00M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$37.00M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$40.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$12.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$21.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$21.00M	USD	Annual
Pension and other postretirement benefits	`PensionAndOtherPostretirementBenefitExpense`	$24.00M	USD	Annual
Pension and other postretirement benefits	`PensionAndOtherPostretirementBenefitExpense`	$34.00M	USD	Annual
Pension and other postretirement benefits	`PensionAndOtherPostretirementBenefitExpense`	$28.00M	USD	Annual
Unrealized losses on non-qualified benefit plan trust assets	`UnrealizedGainLossOnSecurities`	$-2.00M	USD	Annual
Unrealized losses on non-qualified benefit plan trust assets	`UnrealizedGainLossOnSecurities`	$-5.00M	USD	Annual
Unrealized losses on non-qualified benefit plan trust assets	`UnrealizedGainLossOnSecurities`	$-6.00M	USD	Annual
Decoupling mechanism deferrals, net of amortization	`DecouplingMechanismDeferralsNet`	$-6.00M	USD	Annual
Decoupling mechanism deferrals, net of amortization	`DecouplingMechanismDeferralsNet`	$-22.00M	USD	Annual
Decoupling mechanism deferrals, net of amortization	`DecouplingMechanismDeferralsNet`	$14.00M	USD	Annual
Other non-cash income and expenses, net	`OtherNoncashIncomeExpense`	$-29.00M	USD	Annual
Other non-cash income and expenses, net	`OtherNoncashIncomeExpense`	$-7.00M	USD	Annual
Other non-cash income and expenses, net	`OtherNoncashIncomeExpense`	$-22.00M	USD	Annual
(Increase) in receivables and unbilled revenues	`IncreaseDecreaseInReceivables`	$9.00M	USD	Annual
(Increase) in receivables and unbilled revenues	`IncreaseDecreaseInReceivables`	$3.00M	USD	Annual
(Increase) in receivables and unbilled revenues	`IncreaseDecreaseInReceivables`	$11.00M	USD	Annual
(Increase) decrease in margin deposits	`IncreaseDecreaseInMarginDepositsOutstanding`	$-25.00M	USD	Annual
(Increase) decrease in margin deposits	`IncreaseDecreaseInMarginDepositsOutstanding`	$22.00M	USD	Annual
(Increase) decrease in margin deposits	`IncreaseDecreaseInMarginDepositsOutstanding`	$3.00M	USD	Annual
Increase in payables and accrued liabilities	`IncreaseDecreaseInAccountsPayable`	$6.00M	USD	Annual
Increase in payables and accrued liabilities	`IncreaseDecreaseInAccountsPayable`	$15.00M	USD	Annual
Increase in payables and accrued liabilities	`IncreaseDecreaseInAccountsPayable`	$5.00M	USD	Annual
Other working capital items, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$4.00M	USD	Annual
Other working capital items, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-1.00M	USD	Annual
Other working capital items, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$4.00M	USD	Annual
Contribution to non-qualified employee benefit trust	`IncreaseDecreaseInDeferredCompensation`	$-9.00M	USD	Annual
Contribution to non-qualified employee benefit trust	`IncreaseDecreaseInDeferredCompensation`	$-8.00M	USD	Annual
Contribution to non-qualified employee benefit trust	`IncreaseDecreaseInDeferredCompensation`	$-10.00M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingAssets`	$28.00M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingAssets`	$12.00M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingAssets`	$18.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$520.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$553.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$597.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$584.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$598.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$514.00M	USD	Annual
Purchases of nuclear decommissioning trust securities	`PaymentsToInvestInDecommissioningFund`	$18.00M	USD	Annual
Purchases of nuclear decommissioning trust securities	`PaymentsToInvestInDecommissioningFund`	$25.00M	USD	Annual
Purchases of nuclear decommissioning trust securities	`PaymentsToInvestInDecommissioningFund`	$19.00M	USD	Annual
Sales of nuclear decommissioning trust securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	$27.00M	USD	Annual
Sales of nuclear decommissioning trust securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	$21.00M	USD	Annual
Sales of nuclear decommissioning trust securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	$22.00M	USD	Annual
Distribution from nuclear decommissioning trust	`PaymentsForProceedsFromInvestments`	-	USD	Annual
Distribution from nuclear decommissioning trust	`PaymentsForProceedsFromInvestments`	$-50.00M	USD	Annual
Distribution from nuclear decommissioning trust	`PaymentsForProceedsFromInvestments`	-	USD	Annual
Sales tax refund received - Tucannon River Wind Farm	`IncreaseDecreaseInOtherReceivables`	-	USD	Annual
Sales tax refund received - Tucannon River Wind Farm	`IncreaseDecreaseInOtherReceivables`	$-23.00M	USD	Annual
Sales tax refund received - Tucannon River Wind Farm	`IncreaseDecreaseInOtherReceivables`	-	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	-	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$3.00M	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$3.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-522.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-585.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-514.00M	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$225.00M	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$75.00M	USD	Point-in-time
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$290.00M	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$145.00M	USD	Annual
Proceeds from issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$150.00M	USD	Point-in-time
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$150.00M	USD	Annual
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$133.00M	USD	Annual
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$442.00M	USD	Annual
Proceeds from issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$20.00M	USD	1 Quarter
Proceeds from issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$271.00M	USD	1 Quarter
Proceeds from issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	-	USD	Annual
Proceeds from issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	-	USD	Annual
Proceeds from issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$271.00M	USD	Annual
(Maturities) issuances of commercial paper, net	`ProceedsFromRepaymentsOfCommercialPaper`	$-6.00M	USD	Annual
(Maturities) issuances of commercial paper, net	`ProceedsFromRepaymentsOfCommercialPaper`	$6.00M	USD	Annual
(Maturities) issuances of commercial paper, net	`ProceedsFromRepaymentsOfCommercialPaper`	-	USD	Annual
Dividends paid	`PaymentsOfDividends`	$118.00M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$97.00M	USD	Annual
Dividends paid	`PaymentsOfDividends`	$110.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-7.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-7.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-4.00M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-121.00M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$34.00M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-50.00M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-123.00M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$2.00M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$33.00M	USD	Annual
Cash and cash equivalents, beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$39.00M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$127.00M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$4.00M	USD	Point-in-time
Cash and cash equivalents, beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$6.00M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$39.00M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$127.00M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$4.00M	USD	Point-in-time
Cash and cash equivalents, end of year	`CashAndCashEquivalentsAtCarryingValue`	$6.00M	USD	Point-in-time
Cash paid for interest, net of amounts capitalized	`InterestPaidNet`	$104.00M	USD	Annual
Cash paid for interest, net of amounts capitalized	`InterestPaidNet`	$110.00M	USD	Annual
Cash paid for interest, net of amounts capitalized	`InterestPaidNet`	$108.00M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$18.00M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$16.00M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$3.00M	USD	Annual
Accrued capital additions	`CapitalExpendituresIncurredButNotYetPaid`	$32.00M	USD	Annual
Accrued capital additions	`CapitalExpendituresIncurredButNotYetPaid`	$50.00M	USD	Annual
Accrued capital additions	`CapitalExpendituresIncurredButNotYetPaid`	$53.00M	USD	Annual
Accrued dividends payable	`DividendsPayableCurrentAndNoncurrent`	$28.00M	USD	Point-in-time
Accrued dividends payable	`DividendsPayableCurrentAndNoncurrent`	$30.00M	USD	Point-in-time
Accrued dividends payable	`DividendsPayableCurrentAndNoncurrent`	$31.00M	USD	Point-in-time
Assets obtained under leasing arrangements	`CapitalLeaseObligationsIncurred`	-	USD	Annual
Assets obtained under leasing arrangements	`CapitalLeaseObligationsIncurred`	$87.00M	USD	Annual
Assets obtained under leasing arrangements	`CapitalLeaseObligationsIncurred`	$78.00M	USD	Annual

Stockholders Equity 29 line items

Line Item	Tag	Value	Unit	Period
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$12.00M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	-	USD	Annual
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	$1.18	USD	Annual
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	$1.34	USD	Annual
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	$1.26	USD	Annual
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.26B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.91B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.34B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.42B	USD	Point-in-time
Issuances of common stock, net of issuance costs	`StockIssuedDuringPeriodValueNewIssues`	$271.00M	USD	Annual
Proceeds from issuance of shares pursuant to equity-based plans	`ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions`	$1.00M	USD	Annual
Proceeds from issuance of shares pursuant to equity-based plans	`ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions`	$2.00M	USD	Annual
Proceeds from issuance of shares pursuant to equity-based plans	`ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions`	$1.00M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$6.00M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$4.00M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$4.00M	USD	Annual
Dividends declared	`DividendsCommonStock`	$102.00M	USD	Annual
Dividends declared	`DividendsCommonStock`	$113.00M	USD	Annual
Dividends declared	`DividendsCommonStock`	$120.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$193.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$187.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$172.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$1.00M	USD	Annual
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.26B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.91B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.34B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.42B	USD	Point-in-time

Comprehensive Income 9 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$193.00M	USD	Annual
Net income	`ProfitLoss`	$187.00M	USD	Annual
Net income	`ProfitLoss`	$172.00M	USD	Annual
Other comprehensive (loss) income - Change in compensation retirement benefits liability and amortization, net of taxes of an immaterial amount in 2017, 2016, and 2015	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.00M	USD	Annual
Other comprehensive (loss) income - Change in compensation retirement benefits liability and amortization, net of taxes of an immaterial amount in 2017, 2016, and 2015	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.00M	USD	Annual
Other comprehensive (loss) income - Change in compensation retirement benefits liability and amortization, net of taxes of an immaterial amount in 2017, 2016, and 2015	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$171.00M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$186.00M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$194.00M	USD	Annual

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