10-K Filing

CMS ENERGY CORP CIK: 811156 FY 2023

Filing Information

Form Type	10-K
Accession Number	`0000811156-24-000044`
Period End Date	20231231
Filing Date	20240208
Fiscal Year	2023
Fiscal Period	FY
XBRL Instance	cms-20231231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 110 Income Statement 93 Cash Flow Statement 107 Stockholders Equity 39 Comprehensive Income 51

Balance Sheet 110 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$27.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$21.00M	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`	291.30M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	294.40M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$227.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$164.00M	USD	Point-in-time
Preferred stock authorized (in shares)	`PreferredStockSharesAuthorized`	10.00M	shares	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$18.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$21.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$840.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$587.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$267.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$212.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$84.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$65.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$426.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$384.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$57.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$203.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$113.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$80.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.84B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$3.43B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$29.89B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$33.13B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$30.49B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.01B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$8.96B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$21.53B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$24.13B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.18B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$944.00M	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$22.71B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$25.07B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.60B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.68B	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$22.00M	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$23.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$76.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.47B	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.21B	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$310.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$357.00M	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$5.61B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$5.21B	USD	Point-in-time
Total Assets	`Assets`	$33.52B	USD	Point-in-time
Total Assets	`Assets`	$28.75B	USD	Point-in-time
Total Assets	`Assets`	$31.35B	USD	Point-in-time
Current portion of long-term debt and finance leases	`LongTermDebtAndLeaseObligationCurrentExcludingNotesPayable`	$980.00M	USD	Point-in-time
Current portion of long-term debt and finance leases	`LongTermDebtAndLeaseObligationCurrentExcludingNotesPayable`	$1.10B	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$93.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$20.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	-	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$54.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$122.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$142.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$538.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$612.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$104.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$56.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$166.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$149.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.98B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.90B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$13.12B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$14.51B	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$62.00M	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$68.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.80B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.89B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$108.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$106.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$771.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$746.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$129.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$126.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.41B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.62B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$415.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$397.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$22.50B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$20.77B	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`	$5.49B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.71B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-52.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-46.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.66B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.35B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$6.79B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$7.32B	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	$224.00M	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	$224.00M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$7.54B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$7.01B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$581.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$580.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$33.52B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$31.35B	USD	Point-in-time

Income Statement 93 line items

Line Item	Tag	Value	Unit	Period
Tax effect of discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$1.00M	USD	Annual
Tax effect of discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$170.00M	USD	Annual
Tax effect of discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	-	USD	Annual
Operating Revenue	`Revenues`	$7.46B	USD	Annual
Operating Revenue	`Revenues`	$8.60B	USD	Annual
Operating Revenue	`Revenues`	$7.33B	USD	Annual
Fuel for electric generation	`FuelCosts`	$905.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$593.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$561.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$76.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$75.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$77.00M	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.69B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.67B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.61B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.11B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.13B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.18B	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$389.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$447.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$412.00M	USD	Annual
Total operating expenses	`CostsAndExpenses`	$6.18B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$6.23B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$7.37B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.15B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.22B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.24B	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$165.00M	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$180.00M	USD	Annual
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$205.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$30.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$195.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$19.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$18.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$27.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$13.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$362.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$197.00M	USD	Annual
Total other income	`NonoperatingIncomeExpense`	$177.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$616.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$509.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$481.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$3.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$3.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.00M	USD	Annual
Total interest charges	`InterestExpense`	$643.00M	USD	Annual
Total interest charges	`InterestExpense`	$500.00M	USD	Annual
Total interest charges	`InterestExpense`	$519.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$823.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$954.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$902.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$95.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$147.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$93.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$807.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$809.00M	USD	Annual
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$728.00M	USD	Annual
Income From Discontinued Operations, Net of Tax of $, $1, and $170	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$4.00M	USD	Annual
Income From Discontinued Operations, Net of Tax of $, $1, and $170	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$1.00M	USD	Annual
Income From Discontinued Operations, Net of Tax of $, $1, and $170	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$602.00M	USD	Annual
Net Income	`ProfitLoss`	$808.00M	USD	Annual
Net Income	`ProfitLoss`	$813.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-24.00M	USD	Annual
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-23.00M	USD	Annual
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-79.00M	USD	Annual
Net Income	`NetIncomeLoss`	$887.00M	USD	Annual
Net Income	`NetIncomeLoss`	$1.35B	USD	Annual
Net Income	`NetIncomeLoss`	$837.00M	USD	Annual
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$5.00M	USD	Annual
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$10.00M	USD	Annual
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$10.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$877.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$827.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.35B	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$3.01	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.58	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.84	USD	Annual
Income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.01	USD	Annual
Income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$2.08	USD	Annual
Income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$3.01	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$2.85	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$4.66	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.84	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.58	USD	Annual
Income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$3.01	USD	Annual
Income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	Annual
Income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.01	USD	Annual
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`	$2.85	USD	Annual
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`	$3.01	USD	Annual

Cash Flow Statement 107 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$808.00M	USD	Annual
Net Income	`ProfitLoss`	$813.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.11B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.13B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$1.18B	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$157.00M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$249.00M	USD	Annual
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$89.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$34.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$50.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$22.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$12.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$12.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$12.00M	USD	Annual
Gain from sale of EnerBank	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	$657.00M	USD	Annual
Gain from sale of EnerBank	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	-	USD	Annual
Gain from sale of EnerBank	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	$5.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$274.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$70.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$93.00M	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-111.00M	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	-	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-241.00M	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$677.00M	USD	Annual
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$103.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$93.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-185.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$450.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$4.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$153.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-136.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-14.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$21.00M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-13.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$4.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-147.00M	USD	Annual
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$16.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$855.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.31B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.82B	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	-	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$898.00M	USD	Annual
Net proceeds from sale of EnerBank	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$5.00M	USD	Annual
Net cash provided by discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash provided by discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$78.00M	USD	Annual
Net cash provided by discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	-	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$107.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$133.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$167.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.39B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.48B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.23B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$3.55B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.90B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$335.00M	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$2.13B	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$106.00M	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$235.00M	USD	Annual
Increase in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$73.00M	USD	Annual
Increase in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$20.00M	USD	Annual
Increase in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$26.00M	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$69.00M	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$192.00M	USD	Annual
Issuance of preferred stock, net of issuance costs	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	-	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
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$579.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$544.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$508.00M	USD	Annual
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	$49.00M	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`	$86.00M	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$1.00M	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$6.00M	USD	Annual
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$2.00M	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash used in discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$-84.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-54.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-54.00M	USD	Annual
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-62.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-295.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.14B	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.33B	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`	$66.00M	USD	Annual
Net Increase (Decrease) in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-294.00M	USD	Annual
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$248.00M	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`	$476.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$182.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$248.00M	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`	$476.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$182.00M	USD	Point-in-time
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$490.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$489.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaidNet`	$607.00M	USD	Annual
Income taxes paid	`IncomeTaxesPaidNet`	$15.00M	USD	Annual
Income taxes paid	`IncomeTaxesPaidNet`	$1.00M	USD	Annual
Income taxes paid	`IncomeTaxesPaidNet`	$16.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$196.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$228.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$265.00M	USD	Annual

Stockholders Equity 39 line items

Line Item	Tag	Value	Unit	Period
Beginning of period (in shares)	`CommonStockSharesOutstanding`	291.30M	shares	Point-in-time
Beginning of period (in shares)	`CommonStockSharesOutstanding`	294.40M	shares	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$19.00M	USD	Annual
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$5.00M	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	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`	$-1.00M	USD	Annual
Unrealized gain on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized gain on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized gain on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	Annual
Net Income	`ProfitLoss`	$808.00M	USD	Annual
Net Income	`ProfitLoss`	$813.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.19B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
End of period (in shares)	`CommonStockSharesOutstanding`	291.30M	shares	Point-in-time
End of period (in shares)	`CommonStockSharesOutstanding`	294.40M	shares	Point-in-time
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.84	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`	$1.95	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$1.05	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.57	USD	Annual
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$1.05	USD	Annual

Comprehensive Income 51 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$808.00M	USD	Annual
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$2.00M	USD	Annual
Net Income	`ProfitLoss`	$813.00M	USD	Annual
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$6.00M	USD	Annual
Net Income	`ProfitLoss`	$1.33B	USD	Annual
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	Annual
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
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-2.00M	USD	Annual
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$19.00M	USD	Annual
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$5.00M	USD	Annual
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	Annual
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	Annual
Amortization of prior service credit, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	Annual
Unrealized gain on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	Annual
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.00M	USD	Annual
Unrealized gain on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	Annual
Unrealized gain on derivative instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$1.00M	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`	$-1.00M	USD	Annual
Reclassification adjustments included in net income , tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$1.00M	USD	Annual
Unrealized gain on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized gain on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$2.00M	USD	Annual
Unrealized gain on derivative instruments, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	Annual
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	Annual
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$27.00M	USD	Annual
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$6.00M	USD	Annual
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$7.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$814.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.36B	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$820.00M	USD	Annual
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-23.00M	USD	Annual
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-24.00M	USD	Annual
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-79.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$844.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$1.38B	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$893.00M	USD	Annual

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