10-K Filing

PINNACLE WEST CAPITAL CORP CIK: 764622 FY 2018

Filing Information

Form Type	10-K
Accession Number	`0000764622-19-000019`
Period End Date	20181231
Filing Date	20190222
Fiscal Year	2018
Fiscal Period	FY
XBRL Instance	pnw2018123110-k_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 142 Income Statement 139 Cash Flow Statement 151 Stockholders Equity 46 Comprehensive Income 41

Balance Sheet 142 line items

Line Item	Tag	Value	Unit	Period
Accumulated depreciation of Palo Verde sale leaseback	`SaleLeasebackTransactionAccumulatedDepreciation`	$241.41M	USD	Point-in-time
Accumulated depreciation of Palo Verde sale leaseback	`SaleLeasebackTransactionAccumulatedDepreciation`	$245.28M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$5.77M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$13.89M	USD	Point-in-time
Accumulated amortization on intangible assets	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$591.20M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$8.88M	USD	Point-in-time
Accumulated amortization on intangible assets	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$582.27M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.49M	USD	Point-in-time
Accumulated amortization on nuclear fuel	`AccumulatedAmortizationOnNuclearFuel`	$144.07M	USD	Point-in-time
Customer and other receivables	`AccountsReceivableGrossCurrent`	$267.89M	USD	Point-in-time
Customer and other receivables	`AccountsReceivableGrossCurrent`	$305.15M	USD	Point-in-time
Accumulated amortization on nuclear fuel	`AccumulatedAmortizationOnNuclearFuel`	$137.85M	USD	Point-in-time
Accrued unbilled revenues	`ContractWithCustomerAssetNetCurrent`	$137.17M	USD	Point-in-time
Accrued unbilled revenues	`ContractWithCustomerAssetNetCurrent`	$112.43M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$2.51M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$4.07M	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockNoParValue`	-	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockNoParValue`	-	USD	Point-in-time
Materials and supplies (at average cost)	`OtherInventorySupplies`	$264.01M	USD	Point-in-time
Materials and supplies (at average cost)	`OtherInventorySupplies`	$269.06M	USD	Point-in-time
Common stock, authorized shares (in shares)	`CommonStockSharesAuthorized`	150.00M	shares	Point-in-time
Common stock, authorized shares (in shares)	`CommonStockSharesAuthorized`	150.00M	shares	Point-in-time
Common stock, issued shares (in shares)	`CommonStockSharesIssued`	111.82M	shares	Point-in-time
Fossil fuel (at average cost)	`EnergyRelatedInventoryOtherFossilFuel`	$25.03M	USD	Point-in-time
Fossil fuel (at average cost)	`EnergyRelatedInventoryOtherFossilFuel`	$25.26M	USD	Point-in-time
Common stock, issued shares (in shares)	`CommonStockSharesIssued`	112.16M	shares	Point-in-time
Assets from risk management activities (Note 16)	`DerivativeInstrumentsAndHedges`	$1.11M	USD	Point-in-time
Treasury stock at cost, shares (in shares)	`TreasuryStockShares`	64,463.00	shares	Point-in-time
Assets from risk management activities (Note 16)	`DerivativeInstrumentsAndHedges`	$1.93M	USD	Point-in-time
Treasury stock at cost, shares (in shares)	`TreasuryStockShares`	58,135.00	shares	Point-in-time
Deferred fuel and purchased power regulatory asset (Note 3)	`DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent`	$37.16M	USD	Point-in-time
Deferred fuel and purchased power regulatory asset (Note 3)	`DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent`	$75.64M	USD	Point-in-time
Other regulatory assets (Note 3)	`RegulatoryAssetsCurrent`	$172.45M	USD	Point-in-time
Other regulatory assets (Note 3)	`RegulatoryAssetsCurrent`	$129.74M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$48.04M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$56.13M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$924.99M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.02B	USD	Point-in-time
Nuclear decommissioning trust (Notes 13 and 19)	`DecommissioningTrustAssetsAmount`	$851.13M	USD	Point-in-time
Nuclear decommissioning trust (Notes 13 and 19)	`DecommissioningTrustAssetsAmount`	$871.00M	USD	Point-in-time
Other special use funds (Notes 13 and 19)	`CoalReclamationandUnionTrust`	$32.54M	USD	Point-in-time
Other special use funds (Notes 13 and 19)	`CoalReclamationandUnionTrust`	$236.10M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$103.25M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$52.04M	USD	Point-in-time
Total investments and other assets	`TotalInvestmentsAndOtherAssets`	$1.19B	USD	Point-in-time
Total investments and other assets	`TotalInvestmentsAndOtherAssets`	$955.58M	USD	Point-in-time
Plant in service and held for future use	`PropertyPlantAndEquipmentGross`	$17.80B	USD	Point-in-time
Plant in service and held for future use	`PropertyPlantAndEquipmentGross`	$18.74B	USD	Point-in-time
Accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$6.37B	USD	Point-in-time
Accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$6.13B	USD	Point-in-time
Net	`PropertyPlantAndEquipmentNet`	$11.67B	USD	Point-in-time
Net	`PropertyPlantAndEquipmentNet`	$12.37B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.29B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.17B	USD	Point-in-time
Palo Verde sale leaseback, net of accumulated depreciation of $245,275 and $241,405 (Note 18)	`VariableInterestEntityConsolidatedCarryingAmountAssets`	$109.64M	USD	Point-in-time
Palo Verde sale leaseback, net of accumulated depreciation of $245,275 and $241,405 (Note 18)	`VariableInterestEntityConsolidatedCarryingAmountAssets`	$105.78M	USD	Point-in-time
Intangible assets, net of accumulated amortization	`IntangibleAssetsNetExcludingGoodwill`	$257.19M	USD	Point-in-time
Intangible assets, net of accumulated amortization	`IntangibleAssetsNetExcludingGoodwill`	$262.90M	USD	Point-in-time
Nuclear fuel, net of accumulated amortization of $137,850 and $144,070	`NuclearFuelNetOfAmortization`	$117.41M	USD	Point-in-time
Nuclear fuel, net of accumulated amortization of $137,850 and $144,070	`NuclearFuelNetOfAmortization`	$120.22M	USD	Point-in-time
Total property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$14.03B	USD	Point-in-time
Total property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$13.45B	USD	Point-in-time
Regulatory assets (Notes 1, 3 and 4)	`RegulatoryAssetsNoncurrent`	$1.20B	USD	Point-in-time
Regulatory assets (Notes 1, 3 and 4)	`RegulatoryAssetsNoncurrent`	$1.34B	USD	Point-in-time
Assets for other postretirement benefits (Note 7)	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$46.91M	USD	Point-in-time
Assets for other postretirement benefits (Note 7)	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$268.98M	USD	Point-in-time
Other	`OtherDeferredCostsNet`	$129.31M	USD	Point-in-time
Other	`OtherDeferredCostsNet`	$130.67M	USD	Point-in-time
Total deferred debits	`TotalDeferredDebits`	$1.52B	USD	Point-in-time
Total deferred debits	`TotalDeferredDebits`	$1.60B	USD	Point-in-time
Total Assets	`Assets`	$17.02B	USD	Point-in-time
Total Assets	`Assets`	$17.66B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$277.34M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$256.44M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$154.82M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$148.95M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$56.40M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$61.11M	USD	Point-in-time
Common dividends payable	`DividendsPayableCurrent`	$77.67M	USD	Point-in-time
Common dividends payable	`DividendsPayableCurrent`	$82.67M	USD	Point-in-time
Short-term borrowings (Note 5)	`ShortTermBorrowings`	$76.40M	USD	Point-in-time
Short-term borrowings (Note 5)	`ShortTermBorrowings`	$95.40M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$70.39M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$91.17M	USD	Point-in-time
Current maturities of long-term debt (Note 6)	`OtherLongTermDebtCurrent`	$82.00M	USD	Point-in-time
Current maturities of long-term debt (Note 6)	`OtherLongTermDebtCurrent`	$500.00M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeInstrumentsAndHedgesLiabilities`	$59.25M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeInstrumentsAndHedgesLiabilities`	$35.51M	USD	Point-in-time
Liabilities for asset retirements (Note 11)	`AssetRetirementObligationCurrent`	$4.75M	USD	Point-in-time
Liabilities for asset retirements (Note 11)	`AssetRetirementObligationCurrent`	$19.84M	USD	Point-in-time
Regulatory liabilities (Note 3)	`RegulatoryLiabilityCurrent`	$100.09M	USD	Point-in-time
Regulatory liabilities (Note 3)	`RegulatoryLiabilityCurrent`	$165.88M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$246.53M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$184.23M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$1.20B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$1.65B	USD	Point-in-time
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 6)	`LongTermDebtNoncurrent`	$4.79B	USD	Point-in-time
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 6)	`LongTermDebtNoncurrent`	$4.64B	USD	Point-in-time
Deferred income taxes (Note 4)	`DeferredIncomeTaxLiabilitiesNet`	$1.69B	USD	Point-in-time
Deferred income taxes (Note 4)	`DeferredIncomeTaxLiabilitiesNet`	$1.81B	USD	Point-in-time
Regulatory liabilities (Notes 1, 3, 4 and 7)	`RegulatoryLiabilityNoncurrent`	$2.33B	USD	Point-in-time
Regulatory liabilities (Notes 1, 3, 4 and 7)	`RegulatoryLiabilityNoncurrent`	$2.45B	USD	Point-in-time
Liabilities for asset retirements (Note 11)	`AssetRetirementObligationsNoncurrent`	$706.70M	USD	Point-in-time
Liabilities for asset retirements (Note 11)	`AssetRetirementObligationsNoncurrent`	$674.78M	USD	Point-in-time
Liabilities for pension benefits (Note 7)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$327.30M	USD	Point-in-time
Liabilities for pension benefits (Note 7)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$443.17M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeLiabilitiesNoncurrent`	$37.17M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeLiabilitiesNoncurrent`	$24.53M	USD	Point-in-time
Customer advances	`ContractWithCustomerLiabilityNoncurrent`	$114.00M	USD	Point-in-time
Customer advances	`ContractWithCustomerLiabilityNoncurrent`	$137.15M	USD	Point-in-time
Coal mine reclamation	`MineReclamationAndClosingLiabilityNoncurrent`	$231.60M	USD	Point-in-time
Coal mine reclamation	`MineReclamationAndClosingLiabilityNoncurrent`	$212.78M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$200.41M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$205.57M	USD	Point-in-time
Unrecognized tax benefits (Note 4)	`LiabilityForUncertainTaxPositionsNoncurrent`	$13.12M	USD	Point-in-time
Unrecognized tax benefits (Note 4)	`LiabilityForUncertainTaxPositionsNoncurrent`	$22.52M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$148.91M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$147.64M	USD	Point-in-time
Total deferred credits and other	`DeferredCreditsAndOtherLiabilities`	$5.90B	USD	Point-in-time
Total deferred credits and other	`DeferredCreditsAndOtherLiabilities`	$6.03B	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (SEE NOTES)	`CommitmentsAndContingencies`	-	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (SEE NOTES)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock, no par value; authorized 150,000,000 shares, 112,159,896 and 111,816,170 issued at respective dates	`CommonStockValue`	$2.63B	USD	Point-in-time
Common stock, no par value; authorized 150,000,000 shares, 112,159,896 and 111,816,170 issued at respective dates	`CommonStockValue`	$2.61B	USD	Point-in-time
Treasury stock at cost; 58,135 shares at end of 2018 and 64,463 shares at end of 2017	`TreasuryStockValue`	$5.62M	USD	Point-in-time
Treasury stock at cost; 58,135 shares at end of 2018 and 64,463 shares at end of 2017	`TreasuryStockValue`	$4.83M	USD	Point-in-time
Total common stock	`CommonStockValueOutstanding`	$2.61B	USD	Point-in-time
Total common stock	`CommonStockValueOutstanding`	$2.63B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$2.44B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$2.64B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-47.71M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-45.00M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$5.01B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$5.22B	USD	Point-in-time
Noncontrolling interests (Note 18)	`MinorityInterest`	$129.04M	USD	Point-in-time
Noncontrolling interests (Note 18)	`MinorityInterest`	$125.79M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.72B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.94B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$17.66B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$17.02B	USD	Point-in-time

Income Statement 139 line items

Line Item	Tag	Value	Unit	Period
OPERATING REVENUES	`Revenues`	$3.50B	USD	Annual
OPERATING REVENUES	`Revenues`	$944.59M	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$3.69B	USD	Annual
OPERATING REVENUES	`Revenues`	$1.18B	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$759.66M	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$1.27B	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$3.57B	USD	Annual
OPERATING REVENUES	`Revenues`	$974.12M	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$756.38M	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$692.71M	USD	1 Quarter
OPERATING REVENUES	`Revenues`	$677.73M	USD	1 Quarter
Fuel and purchased power	`CostOfGoodsAndServicesSold`	$1.08B	USD	Annual
Fuel and purchased power	`CostOfGoodsAndServicesSold`	$981.30M	USD	Annual
Fuel and purchased power	`CostOfGoodsAndServicesSold`	$1.08B	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$230.84M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$265.68M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$268.40M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$226.07M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$1.04B	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$220.99M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$271.21M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$246.54M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$931.69M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$949.11M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$256.12M	USD	1 Quarter
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$485.83M	USD	Annual
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$582.35M	USD	Annual
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$534.12M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$184.35M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$212.85M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$166.50M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$3.54M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$9.50M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$6.66M	USD	Annual
Total	`CostsAndExpenses`	$2.92B	USD	Annual
Total	`CostsAndExpenses`	$2.66B	USD	Annual
Total	`CostsAndExpenses`	$2.66B	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$85.55M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$773.69M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$433.31M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$909.76M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$459.55M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$242.16M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$66.88M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$67.41M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$297.26M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$31.33M	USD	1 Quarter
OPERATING INCOME	`OperatingIncomeLoss`	$835.61M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$42.14M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$47.01M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$52.32M	USD	Annual
Pension and other postretirement non-service credits - net (Note 7)	`PensionAndOtherPostretirementBenefitExpense`	$-49.79M	USD	Annual
Pension and other postretirement non-service credits - net (Note 7)	`PensionAndOtherPostretirementBenefitExpense`	$-20.37M	USD	Annual
Pension and other postretirement non-service credits - net (Note 7)	`PensionAndOtherPostretirementBenefitExpense`	$-24.66M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$4.01M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$24.90M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$901.00K	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$15.34M	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$17.97M	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$21.54M	USD	Annual
Total	`NonoperatingIncomeExpense`	$48.08M	USD	Annual
Total	`NonoperatingIncomeExpense`	$54.14M	USD	Annual
Total	`NonoperatingIncomeExpense`	$109.04M	USD	Annual
Interest charges	`InterestCostsIncurred`	$219.80M	USD	Annual
Interest charges	`InterestCostsIncurred`	$243.47M	USD	Annual
Interest charges	`InterestCostsIncurred`	$205.72M	USD	Annual
Allowance for borrowed funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$22.11M	USD	Annual
Allowance for borrowed funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$25.18M	USD	Annual
Allowance for borrowed funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$19.97M	USD	Annual
Total	`InterestExpense`	$218.28M	USD	Annual
Total	`InterestExpense`	$197.68M	USD	Annual
Total	`InterestExpense`	$185.75M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$664.44M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$697.94M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$766.22M	USD	Annual
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$88.97M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$6.79M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$144.32M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$20.77M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$44.04M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$4.21M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$236.41M	USD	Annual
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$258.27M	USD	Annual
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$133.90M	USD	Annual
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$-1.26M	USD	1 Quarter
INCOME TAXES (Note 4)	`IncomeTaxExpenseBenefit`	$84.33M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$280.94M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$461.53M	USD	Annual
NET INCOME	`ProfitLoss`	$28.18M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$530.54M	USD	Annual
NET INCOME	`ProfitLoss`	$171.61M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$507.95M	USD	Annual
NET INCOME	`ProfitLoss`	$26.50M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$172.32M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$8.09M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$319.88M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$30.95M	USD	1 Quarter
Less: Net income attributable to noncontrolling interests (Note 18)	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
Less: Net income attributable to noncontrolling interests (Note 18)	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
Less: Net income attributable to noncontrolling interests (Note 18)	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$315.01M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$26.08M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$21.63M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$276.07M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$23.31M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$167.44M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$511.05M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$166.74M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$3.22M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$488.46M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$442.03M	USD	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	112.13M	shares	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	111.41M	shares	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	111.84M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.37M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.55M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.05M	shares	Annual
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$0.03	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$0.21	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$1.49	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$4.56	USD	Annual
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$3.97	USD	Annual
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$2.81	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$0.19	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$1.50	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$0.23	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$2.47	USD	1 Quarter
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$4.37	USD	Annual
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.21	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.35	USD	Annual
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.03	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.80	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.54	USD	Annual
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.19	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.46	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.49	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.23	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.48	USD	1 Quarter
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$3.95	USD	Annual

Cash Flow Statement 151 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$280.94M	USD	1 Quarter
Net income	`ProfitLoss`	$461.53M	USD	Annual
Net income	`ProfitLoss`	$28.18M	USD	1 Quarter
Net income	`ProfitLoss`	$530.54M	USD	Annual
Net income	`ProfitLoss`	$171.61M	USD	1 Quarter
Net income	`ProfitLoss`	$507.95M	USD	Annual
Net income	`ProfitLoss`	$26.50M	USD	1 Quarter
Net income	`ProfitLoss`	$172.32M	USD	1 Quarter
Net income	`ProfitLoss`	$8.09M	USD	1 Quarter
Net income	`ProfitLoss`	$319.88M	USD	1 Quarter
Net income	`ProfitLoss`	$30.95M	USD	1 Quarter
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$650.96M	USD	Annual
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$610.63M	USD	Annual
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$565.01M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-78.28M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-60.30M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-48.41M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$-14.77M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$38.15M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$116.75M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$42.14M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$47.01M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$52.32M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$206.87M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$248.16M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$117.36M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$23.08M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$-4.59M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$-5.17M	USD	Annual
Change in derivative instruments fair value	`UnrealizedGainLossOnDerivatives`	-	USD	Annual
Change in derivative instruments fair value	`UnrealizedGainLossOnDerivatives`	$373.00K	USD	Annual
Change in derivative instruments fair value	`UnrealizedGainLossOnDerivatives`	$403.00K	USD	Annual
Stock compensation	`ShareBasedCompensation`	$18.88M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$19.55M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$20.50M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInReceivables`	$93.80M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInReceivables`	$2.49M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInReceivables`	$-37.53M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$24.74M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$11.71M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$4.49M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$1.49M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$6.68M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$6.10M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$3.16M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$-3.75M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	-	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$-33.84M	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$23.32M	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$10.58M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-23.77M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-66.92M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-14.60M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$9.98M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$6.60M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$447.00K	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$19.15M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$29.59M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$28.17M	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$-143.00K	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$-673.00K	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$300.00K	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$17.73M	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$-2.21M	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$-533.00K	USD	Annual
Change in unrecognized tax benefits	`UnrecognizedTaxBenefitsPeriodIncreaseDecrease`	$-1.24M	USD	Annual
Change in unrecognized tax benefits	`UnrecognizedTaxBenefitsPeriodIncreaseDecrease`	$1.63M	USD	Annual
Change in unrecognized tax benefits	`UnrecognizedTaxBenefitsPeriodIncreaseDecrease`	$5.89M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$14.68M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$45.76M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-109.28M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$68.48M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$-78.60M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$60.16M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-82.79M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-48.96M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-29.98M	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.02B	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.28B	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.12B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.18B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.41B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.28B	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$64.30M	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$27.72M	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$23.71M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-19.97M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-25.18M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-22.11M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsFromDecommissioningFund`	$542.25M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsFromDecommissioningFund`	$633.41M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsFromDecommissioningFund`	$653.03M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentsToInvestInDecommissioningFund`	$672.16M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentsToInvestInDecommissioningFund`	$544.53M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentsToInvestInDecommissioningFund`	$635.69M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$18.65M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$19.08M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.94M	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.19B	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.43B	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.25B	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$848.24M	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$693.15M	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$445.25M	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$370.43M	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$182.00M	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$125.00M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebt`	$137.20M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebt`	$-107.80M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebt`	$-7.00M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$58.00M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$40.00M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$45.00M	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	$32.00M	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	-	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	$57.00M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$308.89M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$289.79M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$274.23M	USD	Annual
Common stock equity issuance and purchases - net	`ProceedsFromIssuanceOfCommonStock`	$-5.05M	USD	Annual
Common stock equity issuance and purchases - net	`ProceedsFromIssuanceOfCommonStock`	$-13.39M	USD	Annual
Common stock equity issuance and purchases - net	`ProceedsFromIssuanceOfCommonStock`	$-4.87M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$22.74M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$22.74M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$22.74M	USD	Annual
Net cash flow (used for) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$315.51M	USD	Annual
Net cash flow (used for) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$198.08M	USD	Annual
Net cash flow (used for) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-92.45M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$5.01M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-8.13M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-30.61M	USD	Annual
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$5.77M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$13.89M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$8.88M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$39.49M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$5.77M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$13.89M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$8.88M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValue`	$39.49M	USD	Point-in-time
Income taxes, net of refunds	`IncomeTaxesPaidNet`	$2.19M	USD	Annual
Income taxes, net of refunds	`IncomeTaxesPaidNet`	$21.17M	USD	Annual
Income taxes, net of refunds	`IncomeTaxesPaidNet`	$9.96M	USD	Annual
Interest, net of amounts capitalized	`InterestPaidNet`	$208.48M	USD	Annual
Interest, net of amounts capitalized	`InterestPaidNet`	$184.46M	USD	Annual
Interest, net of amounts capitalized	`InterestPaidNet`	$189.29M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$114.86M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$130.40M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$132.62M	USD	Annual
Dividends declared but not paid	`DividendsPayableCurrentAndNoncurrent`	$77.67M	USD	Point-in-time
Dividends declared but not paid	`DividendsPayableCurrentAndNoncurrent`	$82.67M	USD	Point-in-time
Dividends declared but not paid	`DividendsPayableCurrentAndNoncurrent`	$72.93M	USD	Point-in-time

Stockholders Equity 46 line items

Line Item	Tag	Value	Unit	Period
Common stock dividends declared (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.70	USD	Annual
Common stock dividends declared (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.56	USD	Annual
Common stock dividends declared (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.87	USD	Annual
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.72B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.94B	USD	Point-in-time
Beginning Balance (in shares)	`CommonStockSharesIssued`	111.82M	shares	Point-in-time
Beginning Balance (in shares)	`CommonStockSharesIssued`	112.16M	shares	Point-in-time
Net income	`ProfitLoss`	$280.94M	USD	1 Quarter
Net income	`ProfitLoss`	$461.53M	USD	Annual
Net income	`ProfitLoss`	$28.18M	USD	1 Quarter
Net income	`ProfitLoss`	$530.54M	USD	Annual
Net income	`ProfitLoss`	$171.61M	USD	1 Quarter
Net income	`ProfitLoss`	$507.95M	USD	Annual
Net income	`ProfitLoss`	$26.50M	USD	1 Quarter
Net income	`ProfitLoss`	$172.32M	USD	1 Quarter
Net income	`ProfitLoss`	$8.09M	USD	1 Quarter
Net income	`ProfitLoss`	$319.88M	USD	1 Quarter
Net income	`ProfitLoss`	$30.95M	USD	1 Quarter
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$926.00K	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$5.85M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.18M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$320.93M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$284.76M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$301.49M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$19.46M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$18.77M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$13.98M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$10.34M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$17.75M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$9.09M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$16.26M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$10.76M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$11.14M	USD	Annual
Stock compensation cumulative effect adjustments	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$45.85M	USD	Point-in-time
Net capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Net capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Net capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Reclassification of income tax effects related to new tax reform (See Note 2)	`TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect`	$-8.55M	USD	Annual
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.72B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.94B	USD	Point-in-time
Ending Balance (in shares)	`CommonStockSharesIssued`	111.82M	shares	Point-in-time
Ending Balance (in shares)	`CommonStockSharesIssued`	112.16M	shares	Point-in-time

Comprehensive Income 41 line items

Line Item	Tag	Value	Unit	Period
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$78.00K	USD	Annual
NET INCOME	`ProfitLoss`	$280.94M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$461.53M	USD	Annual
NET INCOME	`ProfitLoss`	$28.18M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$530.54M	USD	Annual
NET INCOME	`ProfitLoss`	$171.61M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$507.95M	USD	Annual
NET INCOME	`ProfitLoss`	$26.50M	USD	1 Quarter
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$585.00K	USD	Annual
NET INCOME	`ProfitLoss`	$172.32M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$8.09M	USD	1 Quarter
NET INCOME	`ProfitLoss`	$319.88M	USD	1 Quarter
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$-24.00K	USD	Annual
NET INCOME	`ProfitLoss`	$30.95M	USD	1 Quarter
Reclassification of net realized loss, tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax`	$-473.00K	USD	Annual
Reclassification of net realized loss, tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax`	$-985.00K	USD	Annual
Reclassification of net realized loss, tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax`	$-1.29M	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-1.58M	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$633.00K	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$693.00K	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	$-78.00K	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	$-35.00K	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	$-538.00K	USD	Annual
Reclassification of net realized loss, net of tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.23M	USD	Annual
Reclassification of net realized loss, net of tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-1.53M	USD	Annual
Reclassification of net realized loss, net of tax benefit	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.94M	USD	Annual
Pension and other postretirement benefits activity, net of tax (expense) benefit	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-4.40M	USD	Annual
Pension and other postretirement benefits activity, net of tax (expense) benefit	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$1.48M	USD	Annual
Pension and other postretirement benefits activity, net of tax (expense) benefit	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$3.37M	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$926.00K	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$5.85M	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.18M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$506.77M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$462.45M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$536.39M	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
Less: Comprehensive income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$442.96M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$516.89M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$487.28M	USD	Annual

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