10-K Filing

BLACK HILLS CORP /SD/ CIK: 1130464 FY 2021

Filing Information

Form Type	10-K
Accession Number	`0001130464-22-000004`
Period End Date	20211231
Filing Date	20220215
Fiscal Year	2021
Fiscal Period	FY
XBRL Instance	bkh-20211231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 95 Income Statement 65 Cash Flow Statement 112 Stockholders Equity 34 Comprehensive Income 39

Balance Sheet 95 line items

Line Item	Tag	Value	Unit	Period
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	64.79M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$8.92M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$6.36M	USD	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	62.83M	shares	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	54,078.00	shares	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$4.89M	USD	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$4.38M	USD	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	32,492.00	shares	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$265.96M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$321.65M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$117.40M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$150.98M	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$1.85M	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$4.37M	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	$18.02M	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	$19.45M	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$270.29M	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$51.68M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$26.22M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$29.01M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$493.29M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$808.13M	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$7.31B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$7.86B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.29B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.41B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$6.45B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$6.02B	USD	Point-in-time
Goodwill	`Goodwill`	$1.30B	USD	Point-in-time
Goodwill	`Goodwill`	$1.30B	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$11.94M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$14.34M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$13.27M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$10.77M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$226.58M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$526.31M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$37.80M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$38.05M	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.87B	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.58B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$9.13B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$8.09B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$217.76M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$183.34M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$244.76M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$243.61M	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$2.04M	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$1.44M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$25.06M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$17.57M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$234.04M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$420.18M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	-	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$8.44M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$696.53M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$901.71M	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$3.53B	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$4.13B	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredIncomeTaxLiabilitiesNet`	$408.62M	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredIncomeTaxLiabilitiesNet`	$465.39M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$507.66M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$485.38M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$150.56M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$123.92M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$141.45M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$134.67M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.20B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.22B	USD	Point-in-time
Commitments, contingencies and guarantees (Note 3)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments, contingencies and guarantees (Note 3)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock $1.00 par value; 100,000,000 shares authorized; issued: 64,793,095 and 62,827,179, respectively	`CommonStockValue`	$64.79M	USD	Point-in-time
Common stock $1.00 par value; 100,000,000 shares authorized; issued: 64,793,095 and 62,827,179, respectively	`CommonStockValue`	$62.83M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.78B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.66B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$962.46M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$870.74M	USD	Point-in-time
Treasury stock at cost - 54,078 and 32,492, respectively	`TreasuryStockValue`	$2.12M	USD	Point-in-time
Treasury stock at cost - 54,078 and 32,492, respectively	`TreasuryStockValue`	$3.51M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-27.35M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-20.08M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-30.66M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$2.79B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$2.56B	USD	Point-in-time
Non-controlling interest	`NoncontrollingInterestInVariableInterestEntity`	$100.03M	USD	Point-in-time
Non-controlling interest	`NoncontrollingInterestInVariableInterestEntity`	$101.26M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.89B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$9.13B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$8.09B	USD	Point-in-time

Income Statement 65 line items

Line Item	Tag	Value	Unit	Period
Revenue	`Revenues`	$1.70B	USD	Annual
Revenue	`Revenues`	$1.95B	USD	Annual
Revenue	`Revenues`	$1.73B	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$741.93M	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$492.40M	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$570.83M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$495.40M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$501.69M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$495.99M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$209.12M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$224.46M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$235.95M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$60.10M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$56.37M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$52.91M	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.27B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.54B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.33B	USD	Annual
Operating income	`OperatingIncomeLoss`	$406.04M	USD	Annual
Operating income	`OperatingIncomeLoss`	$409.43M	USD	Annual
Operating income	`OperatingIncomeLoss`	$428.30M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$144.93M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$139.29M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$154.11M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.63M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.71M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.46M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$20.00M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	-	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$19.74M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.86M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.90M	USD	1 Quarter
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-5.74M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$1.40M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-2.29M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-163.14M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-151.00M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-152.62M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$258.43M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$242.90M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$275.68M	USD	Annual
Income tax (expense)	`IncomeTaxExpenseBenefit`	$7.17M	USD	Annual
Income tax (expense)	`IncomeTaxExpenseBenefit`	$29.58M	USD	Annual
Income tax (expense)	`IncomeTaxExpenseBenefit`	$32.92M	USD	Annual
Net income	`ProfitLoss`	$251.26M	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
Net income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.15M	USD	Annual
Net income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.52M	USD	Annual
Net income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.01M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$236.74M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$227.61M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$199.31M	USD	Annual
Earnings per share, Basic (usd per share)	`EarningsPerShareBasic`	$3.65	USD	Annual
Earnings per share, Basic (usd per share)	`EarningsPerShareBasic`	$3.29	USD	Annual
Earnings per share, Basic (usd per share)	`EarningsPerShareBasic`	$3.74	USD	Annual
Earnings per share, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.74	USD	Annual
Earnings per share, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.65	USD	Annual
Earnings per share, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.28	USD	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	62.38M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	63.22M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	60.66M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	60.80M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	63.33M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	62.44M	shares	Annual

Cash Flow Statement 112 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$251.26M	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$209.12M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$224.46M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$235.95M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.84M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$6.97M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.88M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$20.00M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	-	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$19.74M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.86M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.90M	USD	1 Quarter
Stock compensation	`ShareBasedCompensation`	$9.65M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$5.37M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$12.10M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$38.02M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$38.09M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$7.26M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$9.59M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$12.00M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$12.41M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-16.48M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-11.67M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-7.02M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$35.71M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$-2.75M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$-2.05M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$-7.58M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$43.17M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$10.84M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$10.66M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$24.66M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-34.91M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$5.05M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$-23.62M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$514.69M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-10.71M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-9.53M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-15.16M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	-	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-4.65M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-167.00K	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-6.00M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$505.51M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$541.86M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$-64.56M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$677.49M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$818.38M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$767.40M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-13.26M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-2.17M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-5.74M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-761.66M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-664.23M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-816.21M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$145.02M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$124.65M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$135.44M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$118.98M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$99.28M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$101.36M	USD	Annual
Term Loan - borrowings	`ProceedsFromOtherShortTermDebt`	-	USD	Annual
Term Loan - borrowings	`ProceedsFromOtherShortTermDebt`	$800.00M	USD	Annual
Term Loan - borrowings	`ProceedsFromOtherShortTermDebt`	-	USD	Annual
Term Loan - repayments	`RepaymentsOfOtherShortTermDebt`	-	USD	Annual
Term Loan - repayments	`RepaymentsOfOtherShortTermDebt`	-	USD	Annual
Term Loan - repayments	`RepaymentsOfOtherShortTermDebt`	$800.00M	USD	Annual
Net borrowings (payments) of Revolving Credit Facility and CP Program	`NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram`	$186.14M	USD	Annual
Net borrowings (payments) of Revolving Credit Facility and CP Program	`NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram`	$-115.46M	USD	Annual
Net borrowings (payments) of Revolving Credit Facility and CP Program	`NetBorrowingsPaymentsOfRevolvingCreditFacilityAndCPProgram`	$163.88M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$600.00M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$400.00M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$1.10B	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$905.74M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$8.44M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$8.60M	USD	Annual
Distributions to non-controlling interests	`PaymentsToMinorityShareholders`	$17.90M	USD	Annual
Distributions to non-controlling interests	`PaymentsToMinorityShareholders`	$15.84M	USD	Annual
Distributions to non-controlling interests	`PaymentsToMinorityShareholders`	$15.75M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-7.06M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-16.74M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-4.04M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$300.21M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$731.87M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$216.88M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$3.07M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-10.49M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-2.92M	USD	Annual
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.66M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.81M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$10.74M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$24.14M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.66M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.81M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$10.74M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$24.14M	USD	Point-in-time
Interest (net of amounts capitalized)	`InterestPaidNet`	$142.69M	USD	Annual
Interest (net of amounts capitalized)	`InterestPaidNet`	$136.55M	USD	Annual
Interest (net of amounts capitalized)	`InterestPaidNet`	$131.77M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-1.52M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-4.68M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-2.17M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$72.22M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$91.49M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$68.76M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$4.77M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$5.04M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$2.11M	USD	Annual

Stockholders Equity 34 line items

Line Item	Tag	Value	Unit	Period
Dividends on common stock (usd per share)	`CommonStockDividendsPerShareCashPaid`	$2.29	USD	Annual
Dividends on common stock (usd per share)	`CommonStockDividendsPerShareCashPaid`	$2.05	USD	Annual
Dividends on common stock (usd per share)	`CommonStockDividendsPerShareCashPaid`	$2.17	USD	Annual
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.89B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
Net income	`ProfitLoss`	$251.26M	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
Other comprehensive (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.26M	USD	Annual
Other comprehensive (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.31M	USD	Annual
Other comprehensive (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-3.74M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$135.44M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$145.02M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$124.65M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$5.19M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$8.02M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$7.08M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$119.92M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$100.00M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$100.00M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.22M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.18M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.20M	USD	Annual
Other	`StockholdersEquityOther`	$1.00K	USD	Annual
Other	`StockholdersEquityOther`	$-327.00K	USD	Annual
Distributions to non-controlling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$15.75M	USD	Annual
Distributions to non-controlling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$15.84M	USD	Annual
Distributions to non-controlling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$17.90M	USD	Annual
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.89B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time

Comprehensive Income 39 line items

Line Item	Tag	Value	Unit	Period
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-191.00K	USD	Annual
Net income	`ProfitLoss`	$251.26M	USD	Annual
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-1.89M	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$664.00K	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	$2.00K	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(664), $191 and $1,886, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.06M	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$-434.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(664), $191 and $1,886, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.96M	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$958.00K	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$665.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(664), $191 and $1,886, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-6.25M	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $0 and $2 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$-8.00K	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$19.00K	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $0 and $2 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $0 and $2 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$27.00K	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$23.00K	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(665), $(958) and $434, respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.73M	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(665), $(958) and $434, respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.43M	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(665), $(958) and $434, respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.18M	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $27, $23 and $19, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-58.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $27, $23 and $19, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-80.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $27, $23 and $19, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-71.00K	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.26M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.31M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-3.74M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$209.58M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$258.52M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$246.07M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.15M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.52M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.01M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$244.01M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$195.57M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$230.92M	USD	Annual

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