10-K Filing

PINNACLE WEST CAPITAL CORP CIK: 764622 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0000764622-21-000013`
Period End Date	20201231
Filing Date	20210224
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	pnw-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 146 Income Statement 75 Cash Flow Statement 128 Stockholders Equity 37 Comprehensive Income 33

Balance Sheet 146 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$59.97M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$10.28M	USD	Point-in-time
Customer and other receivables	`AccountsReceivableGrossCurrent`	$313.58M	USD	Point-in-time
Customer and other receivables	`AccountsReceivableGrossCurrent`	$266.43M	USD	Point-in-time
Accrued unbilled revenues	`ContractWithCustomerAssetNetCurrent`	$128.16M	USD	Point-in-time
Accrued unbilled revenues	`ContractWithCustomerAssetNetCurrent`	$132.20M	USD	Point-in-time
Accumulated depreciation of Palo Verde sale leaseback	`SaleLeasebackTransactionAccumulatedDepreciation`	$253.01M	USD	Point-in-time
Accumulated depreciation of Palo Verde sale leaseback	`SaleLeasebackTransactionAccumulatedDepreciation`	$249.14M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$8.17M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$19.78M	USD	Point-in-time
Accumulated amortization on intangible assets	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$698.50M	USD	Point-in-time
Accumulated amortization on intangible assets	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$647.28M	USD	Point-in-time
Accumulated amortization on nuclear fuel	`AccumulatedAmortizationOnNuclearFuel`	$137.33M	USD	Point-in-time
Materials and supplies (at average cost)	`OtherInventorySupplies`	$331.09M	USD	Point-in-time
Accumulated amortization on nuclear fuel	`AccumulatedAmortizationOnNuclearFuel`	$137.21M	USD	Point-in-time
Materials and supplies (at average cost)	`OtherInventorySupplies`	$314.75M	USD	Point-in-time
Fossil fuel (at average cost)	`EnergyRelatedInventoryOtherFossilFuel`	$14.83M	USD	Point-in-time
Fossil fuel (at average cost)	`EnergyRelatedInventoryOtherFossilFuel`	$19.55M	USD	Point-in-time
Income tax receivable (Note 5)	`IncomeTaxesReceivable`	$21.73M	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
Income tax receivable (Note 5)	`IncomeTaxesReceivable`	$6.79M	USD	Point-in-time
Assets from risk management activities (Note 16)	`DerivativeInstrumentsAndHedges`	$2.93M	USD	Point-in-time
Assets from risk management activities (Note 16)	`DerivativeInstrumentsAndHedges`	$515.00K	USD	Point-in-time
Common stock, issued shares (in shares)	`CommonStockSharesIssued`	112.76M	shares	Point-in-time
Common stock, issued shares (in shares)	`CommonStockSharesIssued`	112.54M	shares	Point-in-time
Treasury stock at cost, shares (in shares)	`TreasuryStockShares`	72,006.00	shares	Point-in-time
Deferred fuel and purchased power regulatory asset (Note 4)	`DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent`	$175.84M	USD	Point-in-time
Deferred fuel and purchased power regulatory asset (Note 4)	`DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent`	$70.14M	USD	Point-in-time
Treasury stock at cost, shares (in shares)	`TreasuryStockShares`	103,546.00	shares	Point-in-time
Other regulatory assets (Note 4)	`RegulatoryAssetsCurrent`	$115.88M	USD	Point-in-time
Other regulatory assets (Note 4)	`RegulatoryAssetsCurrent`	$133.07M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$76.63M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$61.96M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.20B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.03B	USD	Point-in-time
Nuclear decommissioning trust (Notes 13 and 19)	`DecommissioningTrustAssetsAmount`	$1.14B	USD	Point-in-time
Nuclear decommissioning trust (Notes 13 and 19)	`DecommissioningTrustAssetsAmount`	$1.01B	USD	Point-in-time
Other special use funds (Notes 13 and 19)	`CoalReclamationandUnionTrust`	$254.51M	USD	Point-in-time
Other special use funds (Notes 13 and 19)	`CoalReclamationandUnionTrust`	$245.09M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$92.92M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$96.95M	USD	Point-in-time
Total investments and other assets	`TotalInvestmentsAndOtherAssets`	$1.35B	USD	Point-in-time
Total investments and other assets	`TotalInvestmentsAndOtherAssets`	$1.49B	USD	Point-in-time
Plant in service and held for future use	`PropertyPlantAndEquipmentGross`	$19.84B	USD	Point-in-time
Plant in service and held for future use	`PropertyPlantAndEquipmentGross`	$20.84B	USD	Point-in-time
Accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.11B	USD	Point-in-time
Accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$6.64B	USD	Point-in-time
Net	`PropertyPlantAndEquipmentNet`	$13.20B	USD	Point-in-time
Net	`PropertyPlantAndEquipmentNet`	$13.73B	USD	Point-in-time
Construction work in progress	`ConstructionWorkInProgressGross`	$808.13M	USD	Point-in-time
Construction work in progress	`ConstructionWorkInProgressGross`	$937.38M	USD	Point-in-time
Palo Verde sale leaseback, net of accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentSaleLeasebackNet`	$98.04M	USD	Point-in-time
Palo Verde sale leaseback, net of accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentSaleLeasebackNet`	$101.91M	USD	Point-in-time
Intangible assets, net of accumulated amortization	`IntangibleAssetsNetExcludingGoodwill`	$282.57M	USD	Point-in-time
Intangible assets, net of accumulated amortization	`IntangibleAssetsNetExcludingGoodwill`	$290.56M	USD	Point-in-time
Nuclear fuel, net of accumulated amortization	`NuclearFuelNetOfAmortization`	$123.50M	USD	Point-in-time
Nuclear fuel, net of accumulated amortization	`NuclearFuelNetOfAmortization`	$113.64M	USD	Point-in-time
Total property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$14.52B	USD	Point-in-time
Total property, plant and equipment	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$15.16B	USD	Point-in-time
Regulatory assets (Notes 1, 4 and 5)	`RegulatoryAssetsNoncurrent`	$1.30B	USD	Point-in-time
Regulatory assets (Notes 1, 4 and 5)	`RegulatoryAssetsNoncurrent`	$1.13B	USD	Point-in-time
Operating lease right-of-use assets (Note 9)	`OperatingLeaseRightOfUseAsset`	$145.81M	USD	Point-in-time
Operating lease right-of-use assets (Note 9)	`OperatingLeaseRightOfUseAsset`	$505.06M	USD	Point-in-time
Assets for pension and other postretirement benefits (Note 8)	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$502.99M	USD	Point-in-time
Assets for pension and other postretirement benefits (Note 8)	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$90.57M	USD	Point-in-time
Other	`OtherDeferredCostsNet`	$34.98M	USD	Point-in-time
Other	`OtherDeferredCostsNet`	$33.40M	USD	Point-in-time
Total deferred debits	`TotalDeferredDebits`	$1.57B	USD	Point-in-time
Total deferred debits	`TotalDeferredDebits`	$2.18B	USD	Point-in-time
Total Assets	`Assets`	$20.02B	USD	Point-in-time
Total Assets	`Assets`	$18.48B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$346.45M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$318.58M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$159.55M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$144.90M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$53.53M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$56.96M	USD	Point-in-time
Common dividends payable	`DividendsPayableCurrent`	$87.98M	USD	Point-in-time
Common dividends payable	`DividendsPayableCurrent`	$93.53M	USD	Point-in-time
Short-term borrowings (Note 6)	`ShortTermBorrowings`	$114.67M	USD	Point-in-time
Short-term borrowings (Note 6)	`ShortTermBorrowings`	$169.00M	USD	Point-in-time
Current maturities of long-term debt (Note 7)	`OtherLongTermDebtCurrent`	-	USD	Point-in-time
Current maturities of long-term debt (Note 7)	`OtherLongTermDebtCurrent`	$800.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$64.91M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$48.34M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeInstrumentsAndHedgesLiabilities`	$38.95M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeInstrumentsAndHedgesLiabilities`	$7.56M	USD	Point-in-time
Liabilities for asset retirements (Note 12)	`AssetRetirementObligationCurrent`	$15.59M	USD	Point-in-time
Liabilities for asset retirements (Note 12)	`AssetRetirementObligationCurrent`	$11.03M	USD	Point-in-time
Operating lease liabilities (Note 9)	`OperatingLeaseLiabilityCurrent`	$74.78M	USD	Point-in-time
Operating lease liabilities (Note 9)	`OperatingLeaseLiabilityCurrent`	$12.71M	USD	Point-in-time
Regulatory liabilities (Note 4)	`RegulatoryLiabilityCurrent`	$229.09M	USD	Point-in-time
Regulatory liabilities (Note 4)	`RegulatoryLiabilityCurrent`	$234.91M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$187.45M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$168.32M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$1.36B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.08B	USD	Point-in-time
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 7)	`LongTermDebtNoncurrent`	$6.31B	USD	Point-in-time
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 7)	`LongTermDebtNoncurrent`	$4.83B	USD	Point-in-time
Deferred income taxes (Note 5)	`DeferredIncomeTaxLiabilitiesNet`	$1.99B	USD	Point-in-time
Deferred income taxes (Note 5)	`DeferredIncomeTaxLiabilitiesNet`	$2.14B	USD	Point-in-time
Regulatory liabilities (Notes 1, 4, 5 and 8)	`RegulatoryLiabilityNoncurrent`	$2.45B	USD	Point-in-time
Regulatory liabilities (Notes 1, 4, 5 and 8)	`RegulatoryLiabilityNoncurrent`	$2.27B	USD	Point-in-time
Liabilities for asset retirements (Note 12)	`AssetRetirementObligationsNoncurrent`	$689.50M	USD	Point-in-time
Liabilities for asset retirements (Note 12)	`AssetRetirementObligationsNoncurrent`	$646.19M	USD	Point-in-time
Liabilities for pension benefits (Note 8)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$280.19M	USD	Point-in-time
Liabilities for pension benefits (Note 8)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$166.48M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeLiabilitiesNoncurrent`	$11.06M	USD	Point-in-time
Liabilities from risk management activities (Note 16)	`DerivativeLiabilitiesNoncurrent`	$33.19M	USD	Point-in-time
Customer advances	`ContractWithCustomerLiabilityNoncurrent`	$215.33M	USD	Point-in-time
Customer advances	`ContractWithCustomerLiabilityNoncurrent`	$221.03M	USD	Point-in-time
Coal mine reclamation	`UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount`	$165.69M	USD	Point-in-time
Coal mine reclamation	`UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount`	$170.10M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$191.37M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$196.47M	USD	Point-in-time
Unrecognized tax benefits (Note 5)	`LiabilityForUncertainTaxPositionsNoncurrent`	$5.83M	USD	Point-in-time
Unrecognized tax benefits (Note 5)	`LiabilityForUncertainTaxPositionsNoncurrent`	$6.19M	USD	Point-in-time
Operating lease liabilities (Note 9)	`OperatingLeaseLiabilityNoncurrent`	$51.87M	USD	Point-in-time
Operating lease liabilities (Note 9)	`OperatingLeaseLiabilityNoncurrent`	$361.34M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$190.64M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$159.84M	USD	Point-in-time
Total deferred credits and other	`DeferredCreditsAndOtherLiabilities`	$6.59B	USD	Point-in-time
Total deferred credits and other	`DeferredCreditsAndOtherLiabilities`	$6.02B	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, 112,760,051 and 112,540,126 issued at respective dates	`CommonStockValue`	$2.66B	USD	Point-in-time
Common stock, no par value; authorized 150,000,000 shares, 112,760,051 and 112,540,126 issued at respective dates	`CommonStockValue`	$2.68B	USD	Point-in-time
Treasury stock at cost; 72,006 shares at end of 2020 and 103,546 shares at end of 2019	`TreasuryStockValue`	$9.43M	USD	Point-in-time
Treasury stock at cost; 72,006 shares at end of 2020 and 103,546 shares at end of 2019	`TreasuryStockValue`	$6.29M	USD	Point-in-time
Total common stock	`CommonStockValueCommonAndTreasury`	$2.67B	USD	Point-in-time
Total common stock	`CommonStockValueCommonAndTreasury`	$2.65B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$2.84B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$3.03B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-62.80M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-57.10M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$5.63B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$5.43B	USD	Point-in-time
Noncontrolling interests (Note 18)	`MinorityInterest`	$119.29M	USD	Point-in-time
Noncontrolling interests (Note 18)	`MinorityInterest`	$122.54M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.55B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.75B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$20.02B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$18.48B	USD	Point-in-time

Income Statement 75 line items

Line Item	Tag	Value	Unit	Period
OPERATING REVENUES (NOTE 2)	`Revenues`	$3.59B	USD	Annual
OPERATING REVENUES (NOTE 2)	`Revenues`	$3.47B	USD	Annual
OPERATING REVENUES (NOTE 2)	`Revenues`	$3.69B	USD	Annual
Fuel and purchased power	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$1.08B	USD	Annual
Fuel and purchased power	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$1.04B	USD	Annual
Fuel and purchased power	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$993.42M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$1.04B	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$958.91M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$941.62M	USD	Annual
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$614.38M	USD	Annual
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$582.35M	USD	Annual
Depreciation and amortization	`CostOfGoodsAndServicesSoldDepreciationAndAmortization`	$590.93M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$218.58M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$224.84M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$212.85M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$9.50M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$7.29M	USD	Annual
Other expenses	`OtherCostAndExpenseOperating`	$5.89M	USD	Annual
Total	`CostsAndExpenses`	$2.80B	USD	Annual
Total	`CostsAndExpenses`	$2.92B	USD	Annual
Total	`CostsAndExpenses`	$2.80B	USD	Annual
Operating loss	`OperatingIncomeLoss`	$773.69M	USD	Annual
Operating loss	`OperatingIncomeLoss`	$671.96M	USD	Annual
Operating loss	`OperatingIncomeLoss`	$788.15M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$31.43M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$52.32M	USD	Annual
Allowance for equity funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$33.78M	USD	Annual
Pension and other postretirement non-service credits - net (Note 8)	`PensionAndOtherPostretirementBenefitExpense`	$-49.79M	USD	Annual
Pension and other postretirement non-service credits - net (Note 8)	`PensionAndOtherPostretirementBenefitExpense`	$-22.99M	USD	Annual
Pension and other postretirement non-service credits - net (Note 8)	`PensionAndOtherPostretirementBenefitExpense`	$-56.34M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$56.70M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$24.90M	USD	Annual
Other income (Note 17)	`OtherNonoperatingIncome`	$50.26M	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$17.88M	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$57.78M	USD	Annual
Other expense (Note 17)	`OtherNonoperatingExpense`	$17.97M	USD	Annual
Total	`NonoperatingIncomeExpense`	$89.04M	USD	Annual
Total	`NonoperatingIncomeExpense`	$109.04M	USD	Annual
Total	`NonoperatingIncomeExpense`	$86.80M	USD	Annual
Interest charges	`InterestCostsIncurred`	$235.25M	USD	Annual
Interest charges	`InterestCostsIncurred`	$247.50M	USD	Annual
Interest charges	`InterestCostsIncurred`	$243.47M	USD	Annual
Allowance for borrowed funds used during construction (Note 1)	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions`	$18.53M	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`	$18.53M	USD	Annual
Total	`InterestExpense`	$216.72M	USD	Annual
Total	`InterestExpense`	$218.28M	USD	Annual
Total	`InterestExpense`	$228.97M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$542.04M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$648.23M	USD	Annual
INCOME BEFORE INCOME TAXES	`IncomeLossIncludingPortionAttributableToNoncontrollingInterest`	$664.44M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$133.90M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$78.17M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$-15.77M	USD	Annual
NET INCOME	`ProfitLoss`	$530.54M	USD	Annual
NET INCOME	`ProfitLoss`	$570.05M	USD	Annual
NET INCOME	`ProfitLoss`	$557.81M	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
Less: Net income attributable to noncontrolling interests (Note 18)	`NetIncomeLossAttributableToNoncontrollingInterest`	$19.49M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$550.56M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$511.05M	USD	Annual
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$538.32M	USD	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	112.67M	shares	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	112.44M	shares	Annual
Weighted Average common shares outstanding basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	112.13M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.94M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.55M	shares	Annual
Weighted Average common shares outstanding diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	112.76M	shares	Annual
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`	$4.89	USD	Annual
Net income attributable to common shareholders - basic (in dollars per share)	`EarningsPerShareBasic`	$4.79	USD	Annual
Net income attributable to common shareholders diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.87	USD	Annual
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`	$4.77	USD	Annual

Cash Flow Statement 128 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$530.54M	USD	Annual
Net income	`ProfitLoss`	$570.05M	USD	Annual
Net income	`ProfitLoss`	$557.81M	USD	Annual
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$686.25M	USD	Annual
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$650.96M	USD	Annual
Depreciation and amortization including nuclear fuel	`DepreciationDepletionAndAmortization`	$664.14M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-78.28M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-82.48M	USD	Annual
Deferred fuel and purchased power	`IncreaseDecreaseInRegulatoryClauseRevenue`	$-93.65M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$49.51M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$-12.05M	USD	Annual
Deferred fuel and purchased power amortization	`IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization`	$116.75M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$31.43M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$52.32M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$33.78M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-1.48M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$69.47M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$117.36M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$-5.10M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$-5.17M	USD	Annual
Deferred investment tax credit	`DeferredInvestmentTaxCreditExpense`	$-3.94M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$18.29M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$18.38M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$19.55M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInAccountsAndNotesReceivable`	$18.19M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInAccountsAndNotesReceivable`	$-37.53M	USD	Annual
Customer and other receivables	`IncreaseDecreaseInAccountsAndNotesReceivable`	$12.79M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$24.74M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$4.03M	USD	Annual
Accrued unbilled revenues	`IncreaseDecreaseInContractWithCustomerAsset`	$-9.01M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$51.83M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$6.10M	USD	Annual
Materials, supplies and fossil fuel	`IncreaseDecreaseInInventories`	$-11.62M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$21.73M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$-14.94M	USD	Annual
Income tax receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	-	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$3.51M	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$-33.84M	USD	Annual
Other current assets	`IncreaseDecreaseInPrepaidExpense`	$30.64M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-6.06M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$50.64M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-14.60M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$6.60M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-9.92M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$14.65M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$22.52M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$-84.65M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherAccruedLiabilities`	$28.17M	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$247.00K	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$-404.00K	USD	Annual
Change in margin and collateral accounts assets	`IncreaseDecreaseInDepositOtherAssets`	$-143.00K	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$100.00K	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$-125.00K	USD	Annual
Change in margin and collateral accounts liabilities	`ChangeInMarginAndCollateralAccountsLiabilities`	$-2.21M	USD	Annual
Change in unrecognized tax benefits	`IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes`	$2.22M	USD	Annual
Change in unrecognized tax benefits	`IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes`	$-1.24M	USD	Annual
Change in unrecognized tax benefits	`IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes`	$2.70M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-109.28M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$124.22M	USD	Annual
Change in long-term regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$13.02M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$82.89M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$-78.60M	USD	Annual
Change in other long-term assets	`IncreaseDecreaseInOtherOperatingAssets`	$67.45M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-132.67M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-48.96M	USD	Annual
Change in other long-term liabilities	`IncreaseDecreaseInOtherOperatingLiabilities`	$-186.23M	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$956.73M	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$966.37M	USD	Annual
Net cash flow provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.28B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.18B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.19B	USD	Annual
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$1.33B	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$27.72M	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$70.69M	USD	Annual
Contributions in aid of construction	`ProceedsFromContributionInAidOfConstruction`	$62.50M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-18.53M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-25.18M	USD	Annual
Allowance for borrowed funds used during construction	`AllowanceForFundsUsedDuringConstructionInvestingActivities`	$-18.53M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds`	$653.03M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds`	$819.52M	USD	Annual
Proceeds from nuclear decommissioning trust sales and other special use funds	`ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds`	$719.03M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds`	$822.61M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds`	$672.16M	USD	Annual
Investment in nuclear decommissioning trust and other special use funds	`PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds`	$722.18M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.94M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-11.45M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-7.88M	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.13B	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.28B	USD	Annual
Net cash flow used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.19B	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.09B	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$445.25M	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.60B	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$915.15M	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$182.00M	USD	Annual
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$600.00M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebtNet`	$54.27M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebtNet`	$-7.00M	USD	Annual
Short-term borrowings and (repayments) net	`ProceedsFromRepaymentsOfShortTermDebtNet`	$73.33M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$751.69M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$45.00M	USD	Annual
Short-term debt borrowings under revolving credit facility	`ProceedsFromLinesOfCredit`	$49.00M	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	$65.00M	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	$57.00M	USD	Annual
Short-term debt repayments under revolving credit facility	`RepaymentsOfLinesOfCredit`	$770.69M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$308.89M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$350.58M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$329.64M	USD	Annual
Common stock equity issuance and purchases net	`ProceedsFromIssuanceOfCommonStock`	$-5.05M	USD	Annual
Common stock equity issuance and purchases net	`ProceedsFromIssuanceOfCommonStock`	$692.00K	USD	Annual
Common stock equity issuance and purchases net	`ProceedsFromIssuanceOfCommonStock`	$-1.39M	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 provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$361.14M	USD	Annual
Net cash flow provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$178.77M	USD	Annual
Net cash flow provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-92.45M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$49.69M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$4.52M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-8.13M	USD	Annual
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$59.97M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$10.28M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.77M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.89M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$59.97M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$10.28M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.77M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.89M	USD	Point-in-time

Stockholders Equity 37 line items

Line Item	Tag	Value	Unit	Period
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$3.23	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$3.04	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.87	USD	Annual
Beginning balance (in shares)	`CommonStockSharesIssued`	112.76M	shares	Point-in-time
Beginning balance (in shares)	`CommonStockSharesIssued`	112.54M	shares	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.55B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.75B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time
Net income	`ProfitLoss`	$530.54M	USD	Annual
Net income	`ProfitLoss`	$570.05M	USD	Annual
Net income	`ProfitLoss`	$557.81M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-5.70M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$5.85M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-9.39M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$363.06M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$341.89M	USD	Annual
Dividends on common stock	`DividendsCommonStock`	$320.93M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$25.30M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$17.92M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$19.46M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$10.34M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$11.20M	USD	Annual
Purchase of treasury stock	`TreasuryStockValueAcquiredCostMethod`	$7.18M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$11.14M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$10.32M	USD	Annual
Reissuance of treasury stock for stock-based compensation and other	`StockIssuedDuringPeriodValueTreasuryStockReissued`	$6.60M	USD	Annual
Reclassification of income tax effects related to new tax reform	`TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect`	-	USD	Annual
Capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Capital activities by noncontrolling interests	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$22.74M	USD	Annual
Ending balance (in shares)	`CommonStockSharesIssued`	112.76M	shares	Point-in-time
Ending balance (in shares)	`CommonStockSharesIssued`	112.54M	shares	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.35B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.55B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.75B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.14B	USD	Point-in-time

Comprehensive Income 33 line items

Line Item	Tag	Value	Unit	Period
NET INCOME	`ProfitLoss`	$530.54M	USD	Annual
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-662.00K	USD	Annual
NET INCOME	`ProfitLoss`	$570.05M	USD	Annual
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	Annual
Net unrealized loss, tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$78.00K	USD	Annual
NET INCOME	`ProfitLoss`	$557.81M	USD	Annual
Reclassification of net realized gain, tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$171.00K	USD	Annual
Reclassification of net realized gain, tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$473.00K	USD	Annual
Reclassification of net realized gain, tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$375.00K	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$3.45M	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$1.37M	USD	Annual
Pension and other postretirement benefits activity, tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-1.58M	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-78.00K	USD	Annual
Net unrealized loss, net of tax benefit (expense)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-2.09M	USD	Annual
Reclassification of net realized gain, net of tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.53M	USD	Annual
Reclassification of net realized gain, net of tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.14M	USD	Annual
Reclassification of net realized gain, net of tax expense	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-592.00K	USD	Annual
Pension and other postretirement benefits activity, net of tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$4.20M	USD	Annual
Pension and other postretirement benefits activity, net of tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$10.53M	USD	Annual
Pension and other postretirement benefits activity, net of tax benefit (expense)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-4.40M	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-5.70M	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$5.85M	USD	Annual
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-9.39M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$536.39M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$564.35M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$548.42M	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`	$528.93M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$544.86M	USD	Annual
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$516.89M	USD	Annual

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