10-K Filing

CMS ENERGY CORP CIK: 811156 FY 2018

Filing Information

Form Type	10-K
Accession Number	`0000811156-19-000003`
Period End Date	20181231
Filing Date	20190205
Fiscal Year	2018
Fiscal Period	FY
XBRL Instance	cms-20181231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 119 Income Statement 134 Cash Flow Statement 115 Stockholders Equity 73 Comprehensive Income 65

Balance Sheet 119 line items

Line Item	Tag	Value	Unit	Period
Allowance for doubtful accounts receivable	`AllowanceForDoubtfulAccountsReceivableCurrent`	$20.00M	USD	Point-in-time
Allowance for doubtful accounts receivable	`AllowanceForDoubtfulAccountsReceivableCurrent`	$20.00M	USD	Point-in-time
Allowances for doubtful notes receivable	`AllowanceForNotesAndLoansReceivableCurrent`	$24.00M	USD	Point-in-time
Allowances for doubtful notes receivable	`AllowanceForNotesAndLoansReceivableCurrent`	$20.00M	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
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$182.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$153.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$17.00M	USD	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	281.60M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	283.40M	shares	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$21.00M	USD	Point-in-time
Accounts receivable and accrued revenue, less allowances of $20 in both periods	`AccountsReceivableNetCurrent`	$964.00M	USD	Point-in-time
Accounts receivable and accrued revenue, less allowances of $20 in both periods	`AccountsReceivableNetCurrent`	$1.03B	USD	Point-in-time
Notes receivable, less allowances of $24 in 2018 and $20 in 2017	`NotesAndLoansReceivableNetCurrent`	$233.00M	USD	Point-in-time
Notes receivable, less allowances of $24 in 2018 and $20 in 2017	`NotesAndLoansReceivableNetCurrent`	$198.00M	USD	Point-in-time
Notes receivable held for sale	`LoansReceivableHeldForSaleAmount`	-	USD	Point-in-time
Notes receivable held for sale	`LoansReceivableHeldForSaleAmount`	$2.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$14.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$12.00M	USD	Point-in-time
Accrued gas revenue	`UnrecoveredCostsForPurchasedGasAmount`	$16.00M	USD	Point-in-time
Accrued gas revenue	`UnrecoveredCostsForPurchasedGasAmount`	-	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$450.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$458.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$133.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$143.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$57.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$81.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$279.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$257.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$20.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$37.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$83.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$101.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.48B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.47B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$21.01B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$22.51B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$24.40B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$6.51B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.04B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$17.36B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$16.00B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$765.00M	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$763.00M	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$18.13B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$16.76B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.76B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.74B	USD	Point-in-time
Accounts and notes receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$1.19B	USD	Point-in-time
Accounts and notes receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$1.65B	USD	Point-in-time
Investments	`EquityMethodInvestments`	$64.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$65.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$69.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$799.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$478.00M	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$3.81B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$3.94B	USD	Point-in-time
Total Assets	`Assets`	$23.05B	USD	Point-in-time
Total Assets	`Assets`	$21.62B	USD	Point-in-time
Total Assets	`Assets`	$24.53B	USD	Point-in-time
Current portion of long-term debt, capital leases, and financing obligation	`DebtCurrent`	$1.10B	USD	Point-in-time
Current portion of long-term debt, capital leases, and financing obligation	`DebtCurrent`	$996.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$170.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$97.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$725.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$723.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$15.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$10.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$33.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$4.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$94.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$103.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$360.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$398.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$155.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$80.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$147.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$195.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.78B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.62B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$9.12B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$10.62B	USD	Point-in-time
Non-current portion of capital leases and financing obligation	`CapitalLeaseObligationsNoncurrent`	$91.00M	USD	Point-in-time
Non-current portion of capital leases and financing obligation	`CapitalLeaseObligationsNoncurrent`	$69.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.68B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.71B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$436.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$766.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$432.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$430.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$87.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$99.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.27B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.49B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$307.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$294.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$17.11B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$15.79B	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock, authorized 350.0 shares; outstanding 283.4 shares in 2018 and 281.6 shares in 2017	`CommonStockValue`	$3.00M	USD	Point-in-time
Common stock, authorized 350.0 shares; outstanding 283.4 shares in 2018 and 281.6 shares in 2017	`CommonStockValue`	$3.00M	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.02B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.09B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-50.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-65.00M	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-271.00M	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-531.00M	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$4.75B	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$4.44B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$37.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$37.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.48B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.29B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$3.98B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$24.53B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$23.05B	USD	Point-in-time

Income Statement 134 line items

Line Item	Tag	Value	Unit	Period
Operating Revenue	`Revenues`	$6.58B	USD	Annual
Operating Revenue	`Revenues`	$1.53B	USD	1 Quarter
Operating Revenue	`Revenues`	$6.87B	USD	Annual
Operating Revenue	`Revenues`	$1.83B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.83B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.78B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.45B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.49B	USD	1 Quarter
Operating Revenue	`Revenues`	$6.40B	USD	Annual
Operating Revenue	`Revenues`	$1.95B	USD	1 Quarter
Operating Revenue	`Revenues`	$1.60B	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$528.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$505.00M	USD	Annual
Fuel for electric generation	`FuelCosts`	$499.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$81.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$86.00M	USD	Annual
Purchased power related parties	`PurchasedPowerRelatedParties`	$86.00M	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.24B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.42B	USD	Annual
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.25B	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$881.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$811.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$933.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$303.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$281.00M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$284.00M	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.71B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.25B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$5.14B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$241.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$330.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$388.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$379.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$294.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.34B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.16B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$250.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.26B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$363.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$255.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$12.00M	USD	Annual
Interest income	`InvestmentIncomeInterestAndDividend`	$11.00M	USD	Annual
Interest income	`InvestmentIncomeInterestAndDividend`	$6.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$5.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$6.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$12.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$15.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$9.00M	USD	Annual
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$13.00M	USD	Annual
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$24.00M	USD	Annual
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$90.00M	USD	Annual
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$41.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$6.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$8.00M	USD	Annual
Other income	`OtherNonoperatingIncome`	$2.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$48.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$76.00M	USD	Annual
Other expense	`OtherNonoperatingExpense`	$75.00M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-14.00M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$70.00M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$5.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$412.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$411.00M	USD	Annual
Interest on long-term debt	`InterestExpenseDebt`	$406.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$29.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$34.00M	USD	Annual
Other interest expense	`InterestExpenseOther`	$49.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$5.00M	USD	Annual
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$3.00M	USD	Annual
Total interest charges	`InterestExpense`	$435.00M	USD	Annual
Total interest charges	`InterestExpense`	$458.00M	USD	Annual
Total interest charges	`InterestExpense`	$438.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$826.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$886.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$774.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$115.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$424.00M	USD	Annual
Income Tax Expense	`IncomeTaxExpenseBenefit`	$273.00M	USD	Annual
Net Income	`ProfitLoss`	$109.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$462.00M	USD	Annual
Net Income	`ProfitLoss`	$140.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$169.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$241.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$553.00M	USD	Annual
Net Income	`ProfitLoss`	$-2.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$199.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$659.00M	USD	Annual
Net Income	`ProfitLoss`	$172.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$93.00M	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLoss`	$-3.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$139.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$169.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$241.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$657.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLoss`	$460.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLoss`	$172.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$551.00M	USD	Annual
Net Income Available to Common Stockholders	`NetIncomeLoss`	$92.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$108.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$199.00M	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$-0.01	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.86	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.38	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.64	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.33	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.71	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.99	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.60	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`	$2.33	USD	Annual
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.49	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.64	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$2.32	USD	Annual
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.38	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.59	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.49	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`	$0.86	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$-0.01	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.71	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.33	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.98	USD	Annual

Cash Flow Statement 115 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$109.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$462.00M	USD	Annual
Net Income	`ProfitLoss`	$140.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$169.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$241.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$553.00M	USD	Annual
Net Income	`ProfitLoss`	$-2.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$199.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$659.00M	USD	Annual
Net Income	`ProfitLoss`	$172.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$93.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$881.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$811.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$933.00M	USD	Annual
Deferred income taxes and investment tax credit	`DeferredIncomeTaxesAndTaxCredits`	$417.00M	USD	Annual
Deferred income taxes and investment tax credit	`DeferredIncomeTaxesAndTaxCredits`	$182.00M	USD	Annual
Deferred income taxes and investment tax credit	`DeferredIncomeTaxesAndTaxCredits`	$264.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$54.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$49.00M	USD	Annual
Bad debt expense	`ProvisionForDoubtfulAccounts`	$50.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$-82.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$-22.00M	USD	Annual
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$-52.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$12.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$252.00M	USD	Annual
Postretirement benefits contributions	`PensionAndOtherPostretirementBenefitContributions`	$108.00M	USD	Annual
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$66.00M	USD	Annual
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$155.00M	USD	Annual
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-15.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-14.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-146.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$46.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$49.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$59.00M	USD	Annual
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$22.00M	USD	Annual
Other current and non-current assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$43.00M	USD	Annual
Other current and non-current assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-54.00M	USD	Annual
Other current and non-current assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$111.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.70B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.63B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.71B	USD	Annual
Capital expenditures (excludes assets placed under capital lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.67B	USD	Annual
Capital expenditures (excludes assets placed under capital lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.07B	USD	Annual
Capital expenditures (excludes assets placed under capital lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.67B	USD	Annual
Increase in EnerBank notes receivable	`PaymentsToAcquireLoansReceivable`	$136.00M	USD	Annual
Increase in EnerBank notes receivable	`PaymentsToAcquireLoansReceivable`	$138.00M	USD	Annual
Increase in EnerBank notes receivable	`PaymentsToAcquireLoansReceivable`	$307.00M	USD	Annual
Purchase of notes receivable by EnerBank	`PaymentsToAcquireNotesReceivable`	$225.00M	USD	Annual
Purchase of notes receivable by EnerBank	`PaymentsToAcquireNotesReceivable`	-	USD	Annual
Purchase of notes receivable by EnerBank	`PaymentsToAcquireNotesReceivable`	-	USD	Annual
Proceeds from DB SERP investments	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	-	USD	Annual
Proceeds from DB SERP investments	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	-	USD	Annual
Proceeds from DB SERP investments	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	$146.00M	USD	Annual
Proceeds from the sale of EnerBank notes receivable	`ProceedsFromSaleOfNotesReceivable`	$50.00M	USD	Annual
Proceeds from the sale of EnerBank notes receivable	`ProceedsFromSaleOfNotesReceivable`	-	USD	Annual
Proceeds from the sale of EnerBank notes receivable	`ProceedsFromSaleOfNotesReceivable`	-	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$115.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$146.00M	USD	Annual
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$107.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.61B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.92B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.87B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.77B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.63B	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.05B	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.87B	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$980.00M	USD	Annual
Retirement of debt	`RepaymentsOfLongTermDebt`	$728.00M	USD	Annual
Increase in EnerBank certificates of deposit	`ProceedsFromPaymentsForInInterestBearingDepositsInBanks`	$513.00M	USD	Annual
Increase in EnerBank certificates of deposit	`ProceedsFromPaymentsForInInterestBearingDepositsInBanks`	$100.00M	USD	Annual
Increase in EnerBank certificates of deposit	`ProceedsFromPaymentsForInInterestBearingDepositsInBanks`	$47.00M	USD	Annual
Increase (decrease) in notes payable	`RepaymentsOfShortTermDebt`	$73.00M	USD	Annual
Increase (decrease) in notes payable	`RepaymentsOfShortTermDebt`	$228.00M	USD	Annual
Increase (decrease) in notes payable	`ProceedsFromShortTermDebt`	$149.00M	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$72.00M	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$83.00M	USD	Annual
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$41.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$347.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$407.00M	USD	Annual
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$377.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	$22.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	$36.00M	USD	Annual
Debt prepayment costs	`PaymentsOfDebtExtinguishmentCosts`	$18.00M	USD	Annual
Payment of capital lease obligations and other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-61.00M	USD	Annual
Payment of capital lease obligations and other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-22.00M	USD	Annual
Payment of capital lease obligations and other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-46.00M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$874.00M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$110.00M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$255.00M	USD	Annual
Net Decrease in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-53.00M	USD	Annual
Net Decrease in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-29.00M	USD	Annual
Net Decrease in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-31.00M	USD	Annual
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$257.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$288.00M	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`	$204.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$257.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$288.00M	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`	$204.00M	USD	Point-in-time
Interest paid (net of amounts capitalized)	`InterestPaid`	$458.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaid`	$418.00M	USD	Annual
Interest paid (net of amounts capitalized)	`InterestPaid`	$427.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$32.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$-123.00M	USD	Annual
Income taxes paid (refunds received), net	`IncomeTaxesPaidNet`	$5.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$172.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$158.00M	USD	Annual
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$138.00M	USD	Annual
Note receivable recorded for future refund of use taxes paid and capitalized	`RefundNotReceived`	-	USD	Annual
Note receivable recorded for future refund of use taxes paid and capitalized	`RefundNotReceived`	$29.00M	USD	Annual
Note receivable recorded for future refund of use taxes paid and capitalized	`RefundNotReceived`	-	USD	Annual
Other assets placed under capital lease	`CapitalLeaseObligationsIncurred`	$13.00M	USD	Annual
Other assets placed under capital lease	`CapitalLeaseObligationsIncurred`	-	USD	Annual
Other assets placed under capital lease	`CapitalLeaseObligationsIncurred`	$3.00M	USD	Annual

Stockholders Equity 73 line items

Line Item	Tag	Value	Unit	Period
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.48B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.29B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$3.98B	USD	Point-in-time
Beginning of period (in shares)	`CommonStockSharesOutstanding`	281.60M	shares	Point-in-time
Beginning of period (in shares)	`CommonStockSharesOutstanding`	283.40M	shares	Point-in-time
Common stock issued (in shares)	`StockIssuedDuringPeriodSharesNewIssues`	638,898.00	shares	Point-in-time
Common stock issued (in shares)	`StockIssuedDuringPeriodSharesNewIssues`	1.49M	shares	Point-in-time
Common stock issued	`StockIssuedDuringPeriodValueNewIssues`	$70.00M	USD	Point-in-time
Common stock issued	`StockIssuedDuringPeriodValueNewIssues`	$29.00M	USD	Point-in-time
Net income attributable to CMS Energy	`NetIncomeLoss`	$-3.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$139.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$169.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$241.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$657.00M	USD	Annual
Net income attributable to CMS Energy	`NetIncomeLoss`	$460.00M	USD	Annual
Net income attributable to CMS Energy	`NetIncomeLoss`	$172.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$551.00M	USD	Annual
Net income attributable to CMS Energy	`NetIncomeLoss`	$92.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$108.00M	USD	1 Quarter
Net income attributable to CMS Energy	`NetIncomeLoss`	$199.00M	USD	1 Quarter
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-5.00M	USD	Annual
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-4.00M	USD	Annual
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-8.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$-4.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Prior service credit adjustment	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	Annual
Amortization of 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 investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized gain on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Unrealized gain on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	-	USD	Annual
Other-than-temporary impairment included in net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	$3.00M	USD	Annual
Other-than-temporary impairment included in net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	-	USD	Annual
Other-than-temporary impairment included in net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	$-2.00M	USD	Annual
Net Income	`ProfitLoss`	$109.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$462.00M	USD	Annual
Net Income	`ProfitLoss`	$140.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$169.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$241.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$553.00M	USD	Annual
Net Income	`ProfitLoss`	$-2.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$199.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$659.00M	USD	Annual
Net Income	`ProfitLoss`	$172.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$93.00M	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.24	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.33	USD	Annual
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.43	USD	Annual
End of period (in shares)	`CommonStockSharesOutstanding`	281.60M	shares	Point-in-time
End of period (in shares)	`CommonStockSharesOutstanding`	283.40M	shares	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.48B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.29B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$3.98B	USD	Point-in-time

Comprehensive Income 65 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$109.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$462.00M	USD	Annual
Net Income	`ProfitLoss`	$140.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$169.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$241.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$553.00M	USD	Annual
Net loss arising during the period TAX	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-5.00M	USD	Annual
Net Income	`ProfitLoss`	$-2.00M	USD	1 Quarter
Net loss arising during the period TAX	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-4.00M	USD	Annual
Net Income	`ProfitLoss`	$199.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$659.00M	USD	Annual
Net Income	`ProfitLoss`	$172.00M	USD	1 Quarter
Net loss arising during the period TAX	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-1.00M	USD	Annual
Net Income	`ProfitLoss`	$93.00M	USD	1 Quarter
Prior service credit adjustment TAX	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	$3.00M	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`	$-5.00M	USD	Annual
Net loss arising during the period, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-4.00M	USD	Annual
Amortization of net actuarial loss TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$1.00M	USD	Annual
Amortization of net actuarial loss TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	Annual
Amortization of net actuarial loss TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$1.00M	USD	Annual
Net loss arising during the period, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-8.00M	USD	Annual
Prior service credit adjustment, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$-4.00M	USD	Annual
Amortization of prior service credit TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Amortization of prior service credit TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	Annual
Prior service credit adjustment, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Prior service credit adjustment, net of tax	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Amortization of prior service credit TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-1.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	Annual
Unrealized gain on investments TAX	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	-	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	Annual
Unrealized gain on investments TAX	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	-	USD	Annual
Unrealized gain on investments TAX	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	-	USD	Annual
Amortization of prior service credit, net of tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Amortization of prior service credit, net of tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Amortization of prior service credit, net of tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	Annual
Other-than-temporary impairment included in net income TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax`	$2.00M	USD	Annual
Other-than-temporary impairment included in net income TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax`	-	USD	Annual
Other-than-temporary impairment included in net income TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax`	-	USD	Annual
Unrealized gain on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	-	USD	Annual
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	-	USD	Annual
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax`	-	USD	Annual
Unrealized gain on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$1.00M	USD	Annual
Unrealized gain on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	-	USD	Annual
Other-than-temporary impairment included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	$3.00M	USD	Annual
Other-than-temporary impairment included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	-	USD	Annual
Other-than-temporary impairment included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments, net of tax of $- for all periods	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments, net of tax of $- for all periods	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	-	USD	Annual
Unrealized loss on derivative instruments, net of tax of $- for all periods	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax`	$-2.00M	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	$-2.00M	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	-	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	$-3.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$462.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$550.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$657.00M	USD	Annual
Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$2.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$548.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$655.00M	USD	Annual
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$460.00M	USD	Annual

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