10-K Filing

CMS ENERGY CORP CIK: 811156 FY 2021

Filing Information

Form Type	10-K
Accession Number	`0000811156-22-000048`
Period End Date	20211231
Filing Date	20220210
Fiscal Year	2021
Fiscal Period	FY
XBRL Instance	cms-20211231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 122 Income Statement 220 Cash Flow Statement 121 Stockholders Equity 48 Comprehensive Income 65

Balance Sheet 122 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$452.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$24.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$17.00M	USD	Point-in-time
Accounts receivable and accrued revenue	`AccountsReceivableNetCurrent`	$853.00M	USD	Point-in-time
Accounts receivable and accrued revenue	`AccountsReceivableNetCurrent`	$931.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$20.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$29.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$12.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$19.00M	USD	Point-in-time
Common stock authorized (in shares)	`CommonStockSharesAuthorized`	350.00M	shares	Point-in-time
Common stock authorized (in shares)	`CommonStockSharesAuthorized`	350.00M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	288.90M	shares	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$353.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$462.00M	USD	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	289.80M	shares	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$168.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$155.00M	USD	Point-in-time
Preferred stock authorized (in shares)	`PreferredStockSharesAuthorized`	10.00M	shares	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$68.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$37.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$332.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$356.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$46.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$42.00M	USD	Point-in-time
Assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$429.00M	USD	Point-in-time
Assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$19.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$120.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$104.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.40B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.63B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$27.87B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$29.89B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$25.37B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$8.50B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.94B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$19.93B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$21.39B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$961.00M	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.08B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$22.35B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$21.02B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.65B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.26B	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$30.00M	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$19.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$70.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Assets held for sale	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	$2.68B	USD	Point-in-time
Assets held for sale	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	-	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$1.41B	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$823.00M	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$6.25B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$3.77B	USD	Point-in-time
Total Assets	`Assets`	$29.67B	USD	Point-in-time
Total Assets	`Assets`	$26.84B	USD	Point-in-time
Total Assets	`Assets`	$28.75B	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationCurrentAndOtherFinancingCurrent`	$591.00M	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationCurrentAndOtherFinancingCurrent`	$382.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$661.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$875.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$11.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$7.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$12.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$20.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$107.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$104.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$454.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$515.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$151.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$146.00M	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$953.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$156.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$133.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.20B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.07B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$12.05B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$11.74B	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$56.00M	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$46.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.80B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.74B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$152.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$142.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$628.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$553.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$115.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$112.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.21B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.86B	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$1.89B	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	-	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$394.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$375.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$20.52B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$19.36B	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.41B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.37B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-59.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-86.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$214.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.06B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$5.50B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$6.41B	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	$224.00M	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	-	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$5.50B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$6.63B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$557.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$581.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$28.75B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$29.67B	USD	Point-in-time

Income Statement 220 line items

Line Item	Tag	Value	Unit	Period
Operating Revenue	`Revenues`	$1.73B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.80B	USD	1 Quarter
Operating Revenue	`Revenues`	$2.01B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.73B	USD	1 Quarter
Operating Revenue	`Revenues`	$2.03B	USD	1 Quarter
Operating Revenue	`Revenues`	$7.33B	USD	Annual
Operating Revenue	`Revenues`	$6.62B	USD	Annual
Operating Revenue	`Revenues`	$1.51B	USD	1 Quarter
Operating Revenue	`Revenues`	$6.42B	USD	Annual
Operating Revenue	`Revenues`	$1.38B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.56B	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$493.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$593.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$375.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$77.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$64.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$75.00M	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.36B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.28B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.61B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$989.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.11B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.04B	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$389.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$357.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$331.00M	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.19B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.51B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$6.18B	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$335.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$1.23B	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$204.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$248.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$430.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$1.15B	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$260.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$1.11B	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$307.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$340.00M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$252.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$7.00M	USD	Annual
Interest income	`InvestmentIncomeInterestAndDividend`	$3.00M	USD	Annual
Interest income	`InvestmentIncomeInterestAndDividend`	$4.00M	USD	Annual
Interest income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	Annual
Interest income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	Annual
Interest income related parties	`InterestAndDividendIncomeRelatedParties`	$7.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$8.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$10.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$6.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$5.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$10.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$10.00M	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$91.00M	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$165.00M	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$118.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$9.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$4.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$6.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$18.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$62.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$13.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$84.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$109.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$177.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$481.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$439.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$483.00M	USD	Annual
Interest expense related parties	`InterestExpenseRelatedParty`	$12.00M	USD	Annual
Interest expense related parties	`InterestExpenseRelatedParty`	$12.00M	USD	Annual
Interest expense related parties	`InterestExpenseRelatedParty`	$9.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$16.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$12.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$10.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$3.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$4.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.00M	USD	Annual
Total interest charges	`InterestExpense`	$505.00M	USD	Annual
Total interest charges	`InterestExpense`	$500.00M	USD	Annual
Total interest charges	`InterestExpense`	$460.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$823.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$764.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$809.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$131.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$115.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$95.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$229.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$198.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$153.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$129.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$153.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$728.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$694.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$633.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$138.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$114.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$308.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$520.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$12.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$18.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$14.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$30.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$49.00M	USD	Annual
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$24.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$602.00M	USD	Annual
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$34.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$8.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $170, $18, and $16	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$58.00M	USD	Annual
Net Income	`ProfitLoss`	$634.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$243.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$162.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$183.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$752.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Net Income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$682.00M	USD	Annual
Net Income	`ProfitLoss`	$342.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-3.00M	USD	Annual
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-23.00M	USD	Annual
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-5.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-5.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-8.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-7.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$4.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-6.00M	USD	1 Quarter
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$755.00M	USD	Annual
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$680.00M	USD	Annual
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$189.00M	USD	1 Quarter
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$639.00M	USD	1 Quarter
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$1.35B	USD	Annual
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$349.00M	USD	1 Quarter
Net Income Attributable to CMS Energy	`NetIncomeLoss`	$176.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$2.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$3.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	-	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	-	USD	Annual
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	-	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$5.00M	USD	Annual
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	-	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$243.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$136.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$186.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.35B	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$755.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$218.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$158.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$176.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$637.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$680.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$349.00M	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.54	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.09	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.45	USD	Annual
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.40	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.47	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.55	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.45	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.23	USD	Annual
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.81	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.72	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.58	USD	Annual
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.06	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.10	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.05	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.04	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.20	USD	Annual
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.17	USD	Annual
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.03	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.12	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$1.80	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.08	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$2.08	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.55	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.21	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$4.66	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$2.20	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.61	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.48	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$2.40	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$2.65	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.76	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.64	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.86	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.80	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.22	USD	Annual
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.55	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.47	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.44	USD	Annual
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.58	USD	Annual
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.45	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.09	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.40	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.54	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.72	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.17	USD	Annual
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.06	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.03	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.10	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$1.80	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.05	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.08	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.12	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.04	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.20	USD	Annual
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$2.08	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.21	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$2.39	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$2.64	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.48	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.61	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.55	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.76	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.85	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$4.66	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$2.20	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.64	USD	1 Quarter

Cash Flow Statement 121 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$634.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$243.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$162.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$183.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$752.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Net Income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$682.00M	USD	Annual
Net Income	`ProfitLoss`	$342.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$989.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.11B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.04B	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$249.00M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$150.00M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$170.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$22.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$30.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$30.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$10.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$712.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$12.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$15.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$55.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$70.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$33.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$39.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-111.00M	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$5.00M	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-48.00M	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$103.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-44.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$93.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-28.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-71.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$56.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$153.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$93.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-13.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$68.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-37.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$36.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$16.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.82B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.28B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.79B	USD	Annual
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.31B	USD	Annual
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.08B	USD	Annual
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.10B	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$898.00M	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	-	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	-	USD	Annual
Proceeds from sale of transmission equipment	`ProceedsFromSaleOfProductiveAssets`	$58.00M	USD	Annual
Proceeds from sale of transmission equipment	`ProceedsFromSaleOfProductiveAssets`	-	USD	Annual
Proceeds from sale of transmission equipment	`ProceedsFromSaleOfProductiveAssets`	$97.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$78.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-485.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-689.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$133.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$129.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$127.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.23B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.87B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.82B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$3.18B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.15B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$335.00M	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$2.01B	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.28B	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$235.00M	USD	Annual
Decrease in notes payable	`RepaymentsOfShortTermDebt`	$90.00M	USD	Annual
Decrease in notes payable	`RepaymentsOfShortTermDebt`	-	USD	Annual
Decrease in notes payable	`RepaymentsOfShortTermDebt`	$7.00M	USD	Annual
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$12.00M	USD	Annual
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$253.00M	USD	Annual
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$26.00M	USD	Annual
Issuance of preferred stock, net of issuance costs	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	$224.00M	USD	Annual
Issuance of preferred stock, net of issuance costs	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	-	USD	Annual
Issuance of preferred stock, net of issuance costs	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	-	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$509.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$467.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$436.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	$59.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	$8.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	-	USD	Annual
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	-	USD	Annual
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	$417.00M	USD	Annual
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	-	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$31.00M	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$1.00M	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	-	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$416.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$-84.00M	USD	Annual
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$631.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-51.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-50.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-53.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-295.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.01B	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.62B	USD	Annual
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-18.00M	USD	Annual
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$291.00M	USD	Annual
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$28.00M	USD	Annual
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$476.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$175.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$185.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$157.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$476.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$175.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$185.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$157.00M	USD	Point-in-time
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$549.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$498.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$489.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$16.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$-58.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$-58.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$141.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$170.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$196.00M	USD	Annual

Stockholders Equity 48 line items

Line Item	Tag	Value	Unit	Period
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	288.90M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	289.80M	shares	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Net gain (loss) arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-7.00M	USD	Annual
Net gain (loss) arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-15.00M	USD	Annual
Net gain (loss) arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$19.00M	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.00M	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-2.00M	USD	Annual
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-3.00M	USD	Annual
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-2.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Net Income	`ProfitLoss`	$634.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$243.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$162.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$183.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$752.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Net Income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$682.00M	USD	Annual
Net Income	`ProfitLoss`	$342.00M	USD	1 Quarter
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.63	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.74	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.53	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	-	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	-	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.57	USD	Annual

Comprehensive Income 65 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$634.00M	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$6.00M	USD	Annual
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$243.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$162.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-3.00M	USD	Annual
Net Income	`ProfitLoss`	$183.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$752.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-4.00M	USD	Annual
Net Income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$682.00M	USD	Annual
Net Income	`ProfitLoss`	$342.00M	USD	1 Quarter
Settlement arising during the period, tax	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	Annual
Settlement arising during the period, tax	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	Annual
Settlement arising during the period, tax	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	Annual
Prior service credit adjustment, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Net loss arising during the period, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-7.00M	USD	Annual
Net loss arising during the period, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-15.00M	USD	Annual
Prior service credit adjustment, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Prior service credit adjustment, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Net loss arising during the period, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$19.00M	USD	Annual
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	Annual
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	Annual
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-2.00M	USD	Annual
Settlement arising during the period, net of tax	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Settlement arising during the period, net of tax	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Settlement arising during the period, net of tax	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Unrealized gain (loss) on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	Annual
Unrealized gain (loss) on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-2.00M	USD	Annual
Unrealized gain (loss) on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-1.00M	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.00M	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.00M	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income , tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income , tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	Annual
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-2.00M	USD	Annual
Reclassification adjustments included in net income , tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$1.00M	USD	Annual
Unrealized loss on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized loss on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-3.00M	USD	Annual
Unrealized loss on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	Annual
Reclassification adjustments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-2.00M	USD	Annual
Reclassification adjustments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$27.00M	USD	Annual
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-8.00M	USD	Annual
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-13.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.36B	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$674.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$739.00M	USD	Annual
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-3.00M	USD	Annual
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-23.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$742.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$672.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$1.38B	USD	Annual

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