10-K Filing

WEC ENERGY GROUP, INC. CIK: 783325 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0000107815-21-000079`
Period End Date	20201231
Filing Date	20210225
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	wec-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 84 Income Statement 108 Cash Flow Statement 125 Stockholders Equity 30 Comprehensive Income 24

Balance Sheet 84 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable and unbilled revenues, reserves	`AllowanceForDoubtfulAccountsReceivableCurrent`	$220.10M	USD	Point-in-time
Accounts receivable and unbilled revenues, reserves	`AllowanceForDoubtfulAccountsReceivableCurrent`	$140.00M	USD	Point-in-time
Property, plant, and equipment, accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$8.88B	USD	Point-in-time
Property, plant, and equipment, accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.36B	USD	Point-in-time
Common stock, par value	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	325.00M	shares	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	325.00M	shares	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	315.43M	shares	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	315.43M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$37.50M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$84.50M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$24.80M	USD	Point-in-time
Accounts receivable and unbilled revenues, net of reserves of $220.1 and $140.0, respectively	`AccountsReceivableNetCurrent`	$1.18B	USD	Point-in-time
Accounts receivable and unbilled revenues, net of reserves of $220.1 and $140.0, respectively	`AccountsReceivableNetCurrent`	$1.20B	USD	Point-in-time
Materials, supplies, and inventories	`EnergyRelatedInventory`	$549.80M	USD	Point-in-time
Materials, supplies, and inventories	`EnergyRelatedInventory`	$528.60M	USD	Point-in-time
Prepayments	`PrepaidExpenseCurrent`	$263.40M	USD	Point-in-time
Prepayments	`PrepaidExpenseCurrent`	$261.80M	USD	Point-in-time
Other	`OtherAssetsCurrent`	$63.40M	USD	Point-in-time
Other	`OtherAssetsCurrent`	$68.00M	USD	Point-in-time
Current assets	`AssetsCurrent`	$2.08B	USD	Point-in-time
Current assets	`AssetsCurrent`	$2.09B	USD	Point-in-time
Property, plant, and equipment, net of accumulated depreciation and amortization of $9,364.7 and $8,878.7, respectively	`PropertyPlantAndEquipmentNet`	$23.62B	USD	Point-in-time
Property, plant, and equipment, net of accumulated depreciation and amortization of $9,364.7 and $8,878.7, respectively	`PropertyPlantAndEquipmentNet`	$25.71B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.51B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.52B	USD	Point-in-time
Equity investment in transmission affiliates	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$1.76B	USD	Point-in-time
Equity investment in transmission affiliates	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$1.72B	USD	Point-in-time
Goodwill	`Goodwill`	$3.05B	USD	Point-in-time
Goodwill	`Goodwill`	$3.05B	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$957.80M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$896.50M	USD	Point-in-time
Long-term assets	`AssetsNoncurrent`	$34.95B	USD	Point-in-time
Long-term assets	`AssetsNoncurrent`	$32.86B	USD	Point-in-time
Total assets	`Assets`	$34.95B	USD	Point-in-time
Total assets	`Assets`	$37.03B	USD	Point-in-time
Total assets	`Assets`	$33.48B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$830.80M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.78B	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$785.80M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$693.20M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$880.70M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$908.10M	USD	Point-in-time
Accrued payroll and benefits	`EmployeeRelatedLiabilitiesCurrent`	$174.00M	USD	Point-in-time
Accrued payroll and benefits	`EmployeeRelatedLiabilitiesCurrent`	$199.80M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$530.70M	USD	Point-in-time
Other	`OtherLiabilitiesCurrent`	$550.80M	USD	Point-in-time
Current liabilities	`LiabilitiesCurrent`	$4.15B	USD	Point-in-time
Current liabilities	`LiabilitiesCurrent`	$3.18B	USD	Point-in-time
Long-term debt	`LongTermDebtAndCapitalLeaseObligations`	$11.21B	USD	Point-in-time
Long-term debt	`LongTermDebtAndCapitalLeaseObligations`	$11.73B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$3.77B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$4.06B	USD	Point-in-time
Deferred revenue, net	`DeferredRevenueNoncurrent`	$497.10M	USD	Point-in-time
Deferred revenue, net	`DeferredRevenueNoncurrent`	$412.20M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.93B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.99B	USD	Point-in-time
Environmental remediation liabilities	`AccruedEnvironmentalLossContingenciesNoncurrent`	$589.20M	USD	Point-in-time
Environmental remediation liabilities	`AccruedEnvironmentalLossContingenciesNoncurrent`	$532.90M	USD	Point-in-time
Pension and OPEB obligations	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$326.20M	USD	Point-in-time
Pension and OPEB obligations	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$327.00M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$1.23B	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$1.13B	USD	Point-in-time
Long-term liabilities	`LiabilitiesNoncurrent`	$22.22B	USD	Point-in-time
Long-term liabilities	`LiabilitiesNoncurrent`	$21.51B	USD	Point-in-time
Commitments and contingencies (Note 24)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (Note 24)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock $0.01 par value; 325,000,000 shares authorized; 315,434,531 shares outstanding	`CommonStockValue`	$3.20M	USD	Point-in-time
Common stock $0.01 par value; 325,000,000 shares authorized; 315,434,531 shares outstanding	`CommonStockValue`	$3.20M	USD	Point-in-time
Additional paid in capital	`AdditionalPaidInCapitalCommonStock`	$4.14B	USD	Point-in-time
Additional paid in capital	`AdditionalPaidInCapitalCommonStock`	$4.19B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$5.93B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$6.33B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.80M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.10M	USD	Point-in-time
Common shareholders' equity	`TotalCommonShareholdersEquity`	$10.47B	USD	Point-in-time
Common shareholders' equity	`TotalCommonShareholdersEquity`	$10.11B	USD	Point-in-time
Preferred stock of subsidiary	`PreferredStockValue`	$30.40M	USD	Point-in-time
Preferred stock of subsidiary	`PreferredStockValue`	$30.40M	USD	Point-in-time
Noncontrolling interests	`OtherMinorityInterests`	$110.80M	USD	Point-in-time
Noncontrolling interests	`OtherMinorityInterests`	$162.40M	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$34.95B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$37.03B	USD	Point-in-time

Income Statement 108 line items

Line Item	Tag	Value	Unit	Period
Operating revenues	`Revenues`	$1.95B	USD	1 Quarter
Operating revenues	`Revenues`	$1.65B	USD	1 Quarter
Operating revenues	`Revenues`	$1.61B	USD	1 Quarter
Operating revenues	`Revenues`	$2.38B	USD	1 Quarter
Operating revenues	`Revenues`	$7.24B	USD	Annual
Operating revenues	`Revenues`	$1.93B	USD	1 Quarter
Operating revenues	`Revenues`	$7.52B	USD	Annual
Operating revenues	`Revenues`	$1.59B	USD	1 Quarter
Operating revenues	`Revenues`	$2.11B	USD	1 Quarter
Operating revenues	`Revenues`	$1.55B	USD	1 Quarter
Operating revenues	`Revenues`	$7.68B	USD	Annual
Cost of sales	`CostOfGoodsAndServicesSold`	$2.68B	USD	Annual
Cost of sales	`CostOfGoodsAndServicesSold`	$2.32B	USD	Annual
Cost of sales	`CostOfGoodsAndServicesSold`	$2.90B	USD	Annual
Other operation and maintenance	`OtherCostAndExpenseOperating`	$2.27B	USD	Annual
Other operation and maintenance	`OtherCostAndExpenseOperating`	$2.03B	USD	Annual
Other operation and maintenance	`OtherCostAndExpenseOperating`	$2.18B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$845.80M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$975.90M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$926.30M	USD	Annual
Property and revenue taxes	`TaxesExcludingIncomeAndExciseTaxes`	$201.80M	USD	Annual
Property and revenue taxes	`TaxesExcludingIncomeAndExciseTaxes`	$196.90M	USD	Annual
Property and revenue taxes	`TaxesExcludingIncomeAndExciseTaxes`	$208.00M	USD	Annual
Total operating expenses	`CostsAndExpenses`	$6.21B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.99B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.54B	USD	Annual
Operating income	`OperatingIncomeLoss`	$1.47B	USD	Annual
Operating income	`OperatingIncomeLoss`	$370.50M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$310.90M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$542.80M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$370.20M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$314.60M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.53B	USD	Annual
Operating income	`OperatingIncomeLoss`	$363.10M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.71B	USD	Annual
Operating income	`OperatingIncomeLoss`	$338.80M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$626.60M	USD	1 Quarter
Equity in earnings of transmission affiliates	`IncomeLossFromEquityMethodInvestments`	$175.80M	USD	Annual
Equity in earnings of transmission affiliates	`IncomeLossFromEquityMethodInvestments`	$127.60M	USD	Annual
Equity in earnings of transmission affiliates	`IncomeLossFromEquityMethodInvestments`	$136.70M	USD	Annual
Other income, net	`OtherNonoperatingIncomeExpense`	$79.50M	USD	Annual
Other income, net	`OtherNonoperatingIncomeExpense`	$70.30M	USD	Annual
Other income, net	`OtherNonoperatingIncomeExpense`	$102.20M	USD	Annual
Interest expense	`InterestExpense`	$493.70M	USD	Annual
Interest expense	`InterestExpense`	$445.10M	USD	Annual
Interest expense	`InterestExpense`	$501.50M	USD	Annual
Loss on debt extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-38.40M	USD	Annual
Loss on debt extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	Annual
Loss on debt extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-10.50M	USD	Point-in-time
Loss on debt extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	Annual
Loss on debt extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-27.90M	USD	Point-in-time
Other expense	`NonoperatingIncomeExpense`	$-276.80M	USD	Annual
Other expense	`NonoperatingIncomeExpense`	$-271.70M	USD	Annual
Other expense	`NonoperatingIncomeExpense`	$-238.10M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.26B	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.23B	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.43B	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$169.80M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$125.00M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$227.90M	USD	Annual
Net income	`ProfitLoss`	$1.20B	USD	Annual
Net income	`ProfitLoss`	$1.13B	USD	Annual
Net income	`ProfitLoss`	$1.06B	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Net (income) loss attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	Annual
Net (income) loss attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-500.00K	USD	Annual
Net (income) loss attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$300.00K	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$452.50M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.20B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.06B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$234.30M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$420.10M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$266.80M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$239.00M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$243.90M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$241.60M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.13B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$235.70M	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$3.80	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.74	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$3.36	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.76	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.85	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$3.60	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.33	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.77	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$1.43	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.75	USD	1 Quarter
Basic (in dollars per share)	`EarningsPerShareBasic`	$0.77	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$3.34	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.33	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$1.43	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$3.58	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.76	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$3.79	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.76	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.84	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.74	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.74	USD	1 Quarter
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$0.77	USD	1 Quarter
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	315.40M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	315.40M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	315.50M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	316.70M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	316.50M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	316.90M	shares	Annual

Cash Flow Statement 125 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$1.20B	USD	Annual
Net income	`ProfitLoss`	$1.13B	USD	Annual
Net income	`ProfitLoss`	$1.06B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$845.80M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$975.90M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$926.30M	USD	Annual
Deferred income taxes and ITCs, net	`DeferredIncomeTaxesAndTaxCredits`	$209.40M	USD	Annual
Deferred income taxes and ITCs, net	`DeferredIncomeTaxesAndTaxCredits`	$297.30M	USD	Annual
Deferred income taxes and ITCs, net	`DeferredIncomeTaxesAndTaxCredits`	$162.90M	USD	Annual
Contributions and payments related to pension and OPEB plans	`PensionAndOtherPostretirementBenefitContributions`	$65.90M	USD	Annual
Contributions and payments related to pension and OPEB plans	`PensionAndOtherPostretirementBenefitContributions`	$113.20M	USD	Annual
Contributions and payments related to pension and OPEB plans	`PensionAndOtherPostretirementBenefitContributions`	$77.60M	USD	Annual
Equity income in transmission affiliates, net of distributions	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$18.60M	USD	Annual
Equity income in transmission affiliates, net of distributions	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$2.90M	USD	Annual
Equity income in transmission affiliates, net of distributions	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$29.10M	USD	Annual
Accounts receivable and unbilled revenues, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-23.50M	USD	Annual
Accounts receivable and unbilled revenues, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-16.10M	USD	Annual
Accounts receivable and unbilled revenues, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-98.20M	USD	Annual
Materials, supplies, and inventories	`IncreaseDecreaseInInventories`	$1.50M	USD	Annual
Materials, supplies, and inventories	`IncreaseDecreaseInInventories`	$-21.20M	USD	Annual
Materials, supplies, and inventories	`IncreaseDecreaseInInventories`	$8.80M	USD	Annual
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$10.00M	USD	Annual
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$7.10M	USD	Annual
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$-13.40M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$110.60M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-61.30M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$1.50M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-67.60M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-41.20M	USD	Annual
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$78.70M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	$20.60M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	$290.40M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	$3.40M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.35B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.20B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.45B	USD	Annual
Capital expenditures	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	$2.24B	USD	Annual
Capital expenditures	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	$2.12B	USD	Annual
Capital expenditures	`PaymentsToAcquireOtherPropertyPlantAndEquipment`	$2.26B	USD	Annual
Acquisition of Blooming Grove, net of restricted cash acquired of $24.1	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	Annual
Acquisition of Blooming Grove, net of restricted cash acquired of $24.1	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	Annual
Acquisition of Blooming Grove, net of restricted cash acquired of $24.1	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$364.60M	USD	Annual
Acquisition of Tatanka Ridge	`PaymentsToAcquireAssetsInvestingActivities`	$239.90M	USD	Annual
Acquisition of Tatanka Ridge	`PaymentsToAcquireAssetsInvestingActivities`	-	USD	Annual
Acquisition of Tatanka Ridge	`PaymentsToAcquireAssetsInvestingActivities`	-	USD	Annual
Acquisition of Upstream, net of cash and restricted cash acquired of $9.2	`PaymentsToAcquireBusinessTwoNetOfCashAcquired`	-	USD	Annual
Acquisition of Upstream, net of cash and restricted cash acquired of $9.2	`PaymentsToAcquireBusinessTwoNetOfCashAcquired`	$268.20M	USD	Annual
Acquisition of Upstream, net of cash and restricted cash acquired of $9.2	`PaymentsToAcquireBusinessTwoNetOfCashAcquired`	-	USD	Annual
Acquisition of Bishop Hill III, net of restricted cash acquired of $4.5	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	-	USD	Annual
Acquisition of Bishop Hill III, net of restricted cash acquired of $4.5	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	-	USD	Annual
Acquisition of Bishop Hill III, net of restricted cash acquired of $4.5	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	$162.90M	USD	Annual
Acquisition of Forward Wind Energy Center	`PaymentsToAcquireBusinessFive`	-	USD	Annual
Acquisition of Forward Wind Energy Center	`PaymentsToAcquireBusinessFive`	$77.10M	USD	Annual
Acquisition of Forward Wind Energy Center	`PaymentsToAcquireBusinessFive`	-	USD	Annual
Acquisition of Coyote Ridge	`PaymentsToAcquireBusinessFour`	-	USD	Annual
Acquisition of Coyote Ridge	`PaymentsToAcquireBusinessFour`	$61.40M	USD	Annual
Acquisition of Coyote Ridge	`PaymentsToAcquireBusinessFour`	-	USD	Annual
Capital contributions to transmission affiliates	`PaymentsToAcquireInterestInSubsidiariesAndAffiliates`	$52.60M	USD	Annual
Capital contributions to transmission affiliates	`PaymentsToAcquireInterestInSubsidiariesAndAffiliates`	$53.50M	USD	Annual
Capital contributions to transmission affiliates	`PaymentsToAcquireInterestInSubsidiariesAndAffiliates`	$21.20M	USD	Annual
Proceeds from the sale of assets and businesses	`ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets`	$12.10M	USD	Annual
Proceeds from the sale of assets and businesses	`ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets`	$37.60M	USD	Annual
Proceeds from the sale of assets and businesses	`ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets`	$20.30M	USD	Annual
Proceeds from the sale of investments held in rabbi trust	`ProceedsFromSaleOfRestrictedInvestments`	$118.60M	USD	Annual
Proceeds from the sale of investments held in rabbi trust	`ProceedsFromSaleOfRestrictedInvestments`	$200.00K	USD	Annual
Proceeds from the sale of investments held in rabbi trust	`ProceedsFromSaleOfRestrictedInvestments`	$56.20M	USD	Annual
Purchase of investments held in rabbi trust	`PaymentsToAcquireRestrictedInvestments`	$65.00M	USD	Annual
Purchase of investments held in rabbi trust	`PaymentsToAcquireRestrictedInvestments`	$37.80M	USD	Annual
Purchase of investments held in rabbi trust	`PaymentsToAcquireRestrictedInvestments`	-	USD	Annual
Reimbursement for ATC's construction costs	`ProceedsFromCollectionOfOtherReceivables`	$32.40M	USD	Annual
Reimbursement for ATC's construction costs	`ProceedsFromCollectionOfOtherReceivables`	-	USD	Annual
Reimbursement for ATC's construction costs	`ProceedsFromCollectionOfOtherReceivables`	$1.10M	USD	Annual
Insurance proceeds received for property damage	`ProceedsFromInsuranceSettlementInvestingActivities`	$23.20M	USD	Annual
Insurance proceeds received for property damage	`ProceedsFromInsuranceSettlementInvestingActivities`	-	USD	Annual
Insurance proceeds received for property damage	`ProceedsFromInsuranceSettlementInvestingActivities`	-	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-20.50M	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$5.30M	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-16.50M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.38B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.49B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.81B	USD	Annual
Exercise of stock options	`ProceedsFromStockOptionsExercised`	$29.10M	USD	Annual
Exercise of stock options	`ProceedsFromStockOptionsExercised`	$67.00M	USD	Annual
Exercise of stock options	`ProceedsFromStockOptionsExercised`	$43.80M	USD	Annual
Purchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$99.20M	USD	Annual
Purchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$72.40M	USD	Annual
Purchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$140.10M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$697.30M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$798.00M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividendsCommonStock`	$744.50M	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.74B	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.90B	USD	Annual
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.37B	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$360.10M	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$1.77B	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$953.30M	USD	Annual
Issuance of short-term loan	`ProceedsFromOtherShortTermDebt`	$340.00M	USD	Annual
Issuance of short-term loan	`ProceedsFromOtherShortTermDebt`	-	USD	Annual
Issuance of short-term loan	`ProceedsFromOtherShortTermDebt`	-	USD	Annual
Change in other short-term debt	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$-4.50M	USD	Annual
Change in other short-term debt	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$606.10M	USD	Annual
Change in other short-term debt	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$-609.30M	USD	Annual
Payments for debt extinguishment and issuance costs	`PaymentsForDebtExtinguishmentAndIssuanceCosts`	$55.80M	USD	Annual
Payments for debt extinguishment and issuance costs	`PaymentsForDebtExtinguishmentAndIssuanceCosts`	$9.50M	USD	Annual
Payments for debt extinguishment and issuance costs	`PaymentsForDebtExtinguishmentAndIssuanceCosts`	$12.50M	USD	Annual
Purchase of additional ownership interest in Upstream from noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Purchase of additional ownership interest in Upstream from noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	$31.00M	USD	Annual
Purchase of additional ownership interest in Upstream from noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$-11.40M	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$-5.70M	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$-9.90M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$26.40M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$601.10M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$85.60M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$87.50M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-63.80M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-9.70M	USD	Annual
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$82.30M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$146.10M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$72.60M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$58.60M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$82.30M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$146.10M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$72.60M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$58.60M	USD	Point-in-time

Stockholders Equity 30 line items

Line Item	Tag	Value	Unit	Period
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.63	USD	1 Quarter
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.63	USD	1 Quarter
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.63	USD	1 Quarter
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.21	USD	Annual
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.36	USD	Annual
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.63	USD	1 Quarter
Dividends per share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$2.53	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$452.50M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.20B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.06B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$234.30M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$420.10M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$266.80M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$239.00M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$243.90M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$241.60M	USD	1 Quarter
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.13B	USD	Annual
Net income attributed to common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$235.70M	USD	1 Quarter
Net income (loss) attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	Annual
Net income (loss) attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-500.00K	USD	Annual
Net income (loss) attributed to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$300.00K	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$-1.50M	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$-2.70M	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$-5.50M	USD	Annual
Purchase of common stock	`StockRepurchasedDuringPeriodValue`	$99.20M	USD	Annual
Purchase of common stock	`StockRepurchasedDuringPeriodValue`	$140.10M	USD	Annual
Purchase of common stock	`StockRepurchasedDuringPeriodValue`	$72.40M	USD	Annual
Capital contributions from noncontrolling interest	`NoncontrollingInterestIncreaseFromCapitalContributions`	-	USD	Annual
Capital contributions from noncontrolling interest	`NoncontrollingInterestIncreaseFromCapitalContributions`	$21.00M	USD	Annual
Capital contributions from noncontrolling interest	`NoncontrollingInterestIncreaseFromCapitalContributions`	-	USD	Annual

Comprehensive Income 24 line items

Line Item	Tag	Value	Unit	Period
Net derivative loss, net of tax benefit of	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$-1.30M	USD	Annual
Net derivative loss, net of tax benefit of	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$-800.00K	USD	Annual
Net derivative loss, net of tax benefit of	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	$-1.60M	USD	Annual
Pension and OPEB adjustments arising during the period, net of tax expense (benefit) of	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax`	$-1.20M	USD	Annual
Pension and OPEB adjustments arising during the period, net of tax expense (benefit) of	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax`	$-200.00K	USD	Annual
Pension and OPEB adjustments arising during the period, net of tax expense (benefit) of	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax`	$1.00M	USD	Annual
Net income	`ProfitLoss`	$1.20B	USD	Annual
Net income	`ProfitLoss`	$1.13B	USD	Annual
Net income	`ProfitLoss`	$1.06B	USD	Annual
Other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-1.50M	USD	Annual
Other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-2.70M	USD	Annual
Other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-5.50M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.05B	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.13B	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.20B	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Preferred stock dividends of subsidiary	`PreferredStockDividendsIncomeStatementImpact`	$1.20M	USD	Annual
Comprehensive (income) loss attributed to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-500.00K	USD	Annual
Comprehensive (income) loss attributed to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	-	USD	Annual
Comprehensive (income) loss attributed to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$300.00K	USD	Annual
Comprehensive income attributed to common shareholders	`ComprehensiveIncomeNetOfTax`	$1.13B	USD	Annual
Comprehensive income attributed to common shareholders	`ComprehensiveIncomeNetOfTax`	$1.05B	USD	Annual
Comprehensive income attributed to common shareholders	`ComprehensiveIncomeNetOfTax`	$1.20B	USD	Annual

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