10-Q Filing

CMS ENERGY CORP CIK: 811156 Q1 2024

Filing Information

Form Type	10-Q
Accession Number	`0000811156-24-000084`
Period End Date	20240331
Filing Date	20240425
Fiscal Year	2024
Fiscal Period	Q1
XBRL Instance	cms-20240331_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 212 Income Statement 92 Cash Flow Statement 100 Stockholders Equity 36 Comprehensive Income 40

Balance Sheet 212 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$21.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$21.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$23.00M	USD	Point-in-time
Accounts receivable and accrued revenue, allowance	`AllowanceForDoubtfulAccountsReceivableCurrent`	$23.00M	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 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`	294.40M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	294.40M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	298.60M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	298.60M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$227.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$227.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$802.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$802.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$21.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$21.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$59.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$59.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$326.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$326.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$587.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$587.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$273.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$273.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$267.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$267.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$84.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$84.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$78.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$78.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$426.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$426.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$344.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$344.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$203.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$203.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$201.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$201.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$110.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$110.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$80.00M	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`	$2.84B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$3.09B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$3.09B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$33.24B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$33.24B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$33.13B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$33.13B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.01B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.01B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.01B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$9.01B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$24.23B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$24.23B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$24.13B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$24.13B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.05B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.05B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$944.00M	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$944.00M	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$25.28B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$25.28B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$25.07B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$25.07B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.61B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.61B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$3.68B	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`	$22.00M	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$22.00M	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$22.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$76.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$76.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$73.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$73.00M	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.47B	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.47B	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.51B	USD	Point-in-time
Postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$1.51B	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$318.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$318.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$357.00M	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`	$5.61B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$5.53B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$5.53B	USD	Point-in-time
Total Assets	`Assets`	$33.90B	USD	Point-in-time
Total Assets	`Assets`	$33.90B	USD	Point-in-time
Total Assets	`Assets`	$33.52B	USD	Point-in-time
Total Assets	`Assets`	$33.52B	USD	Point-in-time
Current portion of long-term debt and finance leases	`LongTermDebtAndLeaseObligationCurrentExcludingNotesPayable`	$772.00M	USD	Point-in-time
Current portion of long-term debt and finance leases	`LongTermDebtAndLeaseObligationCurrentExcludingNotesPayable`	$772.00M	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`	$980.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$93.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$93.00M	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	-	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	-	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$28.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$28.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$54.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$54.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$142.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$142.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$169.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$169.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$455.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$455.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$612.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$612.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$56.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$56.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$72.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$72.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$149.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$149.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$148.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$148.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.90B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.90B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.29B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.29B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$14.51B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$14.51B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$14.97B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$14.97B	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$61.00M	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$61.00M	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$62.00M	USD	Point-in-time
Non-current portion of finance leases	`FinanceLeaseLiabilityNoncurrent`	$62.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.97B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.97B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.89B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.89B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$106.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$106.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$104.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$104.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$771.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$771.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$777.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$777.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$125.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$125.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$126.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$126.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.68B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.68B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$2.62B	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`	$415.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$413.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$413.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$23.10B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$23.10B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$22.50B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$22.50B	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	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
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.97B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.97B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.71B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.71B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-45.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-45.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-46.00M	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`	$1.66B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.79B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.79B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$7.32B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$7.32B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$7.72B	USD	Point-in-time
Total common stockholders equity	`CommonStockholdersEquity`	$7.72B	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	$224.00M	USD	Point-in-time
Cumulative preferred stock	`PreferredStockValue`	$224.00M	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`	$7.95B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$7.95B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$7.54B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$7.54B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$560.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$560.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$581.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$581.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$33.90B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$33.90B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$33.52B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$33.52B	USD	Point-in-time

Income Statement 92 line items

Line Item	Tag	Value	Unit	Period
Operating Revenue	`Revenues`	$2.18B	USD	1 Quarter
Operating Revenue	`Revenues`	$2.18B	USD	1 Quarter
Operating Revenue	`Revenues`	$2.28B	USD	1 Quarter
Operating Revenue	`Revenues`	$2.28B	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$137.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$137.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$156.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$156.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$18.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$18.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$19.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$19.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$431.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$431.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$402.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$402.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$368.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$368.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$353.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$353.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$142.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$142.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$155.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$155.00M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.97B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.97B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.76B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.76B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$314.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$314.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$412.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$412.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$44.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$44.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$45.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$45.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$44.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$44.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$15.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$15.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$4.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$4.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$2.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$2.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$86.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$86.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$56.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$56.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$172.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$172.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$144.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$144.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$147.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$147.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$177.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$177.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$223.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$223.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$321.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$321.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$29.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$29.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$58.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$58.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-10.00M	USD	1 Quarter
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-10.00M	USD	1 Quarter
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-24.00M	USD	1 Quarter
Loss Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-24.00M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$287.00M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$287.00M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$204.00M	USD	1 Quarter
Net Income	`NetIncomeLoss`	$204.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$2.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$2.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$2.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$2.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$202.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$202.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$285.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$285.00M	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.69	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.69	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.96	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.96	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.69	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.69	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.96	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.96	USD	1 Quarter

Cash Flow Statement 100 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$368.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$368.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$353.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$353.00M	USD	1 Quarter
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$29.00M	USD	1 Quarter
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$29.00M	USD	1 Quarter
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$51.00M	USD	1 Quarter
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$51.00M	USD	1 Quarter
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$19.00M	USD	1 Quarter
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$19.00M	USD	1 Quarter
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$36.00M	USD	1 Quarter
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$36.00M	USD	1 Quarter
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-27.00M	USD	1 Quarter
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-27.00M	USD	1 Quarter
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-174.00M	USD	1 Quarter
Accounts receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-174.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-259.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-259.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-391.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-391.00M	USD	1 Quarter
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-69.00M	USD	1 Quarter
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-69.00M	USD	1 Quarter
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-153.00M	USD	1 Quarter
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-153.00M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$51.00M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$51.00M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$1.00M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$1.00M	USD	1 Quarter
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-94.00M	USD	1 Quarter
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-94.00M	USD	1 Quarter
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-122.00M	USD	1 Quarter
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-122.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.04B	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.04B	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$956.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$956.00M	USD	1 Quarter
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$24.00M	USD	1 Quarter
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$24.00M	USD	1 Quarter
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$34.00M	USD	1 Quarter
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$34.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-637.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-637.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-651.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-651.00M	USD	1 Quarter
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.21B	USD	1 Quarter
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.21B	USD	1 Quarter
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$599.00M	USD	1 Quarter
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$599.00M	USD	1 Quarter
Retirement of debt	`RepaymentsOfLongTermDebt`	$319.00M	USD	1 Quarter
Retirement of debt	`RepaymentsOfLongTermDebt`	$319.00M	USD	1 Quarter
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.00B	USD	1 Quarter
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.00B	USD	1 Quarter
Decrease in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$-93.00M	USD	1 Quarter
Decrease in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$-93.00M	USD	1 Quarter
Decrease in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$-20.00M	USD	1 Quarter
Decrease in notes payable	`ProceedsFromRepaymentsOfShortTermDebt`	$-20.00M	USD	1 Quarter
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$272.00M	USD	1 Quarter
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$272.00M	USD	1 Quarter
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$4.00M	USD	1 Quarter
Issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$4.00M	USD	1 Quarter
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$156.00M	USD	1 Quarter
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$156.00M	USD	1 Quarter
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$145.00M	USD	1 Quarter
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividendsCommonAndPreferred`	$145.00M	USD	1 Quarter
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-17.00M	USD	1 Quarter
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-17.00M	USD	1 Quarter
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-9.00M	USD	1 Quarter
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-9.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$27.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$27.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$294.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$294.00M	USD	1 Quarter
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$613.00M	USD	1 Quarter
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$613.00M	USD	1 Quarter
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$416.00M	USD	1 Quarter
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$416.00M	USD	1 Quarter
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$182.00M	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, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$861.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$861.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$598.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$598.00M	USD	Point-in-time
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`	$248.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$182.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$182.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$861.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$861.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$598.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$598.00M	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`	$248.00M	USD	Point-in-time
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$157.00M	USD	1 Quarter
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$157.00M	USD	1 Quarter
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$156.00M	USD	1 Quarter
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$156.00M	USD	1 Quarter

Stockholders Equity 36 line items

Line Item	Tag	Value	Unit	Period
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.65B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.51B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.12B	USD	Point-in-time
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.52	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.52	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.49	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.49	USD	1 Quarter
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.26	USD	1 Quarter
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.26	USD	1 Quarter
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.26	USD	1 Quarter
Dividends declared per preferred stock Series C depositary share (in dollars per share)	`PreferredStockDividendsPerShareDeclared`	$0.26	USD	1 Quarter

Comprehensive Income 40 line items

Line Item	Tag	Value	Unit	Period
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net gain (loss) arising during the period, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$194.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$263.00M	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Amortization of net actuarial loss, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	1 Quarter
Net gain arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$1.00M	USD	1 Quarter
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$1.00M	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$1.00M	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$1.00M	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$1.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$195.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$195.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$264.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$264.00M	USD	1 Quarter
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-24.00M	USD	1 Quarter
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-24.00M	USD	1 Quarter
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-10.00M	USD	1 Quarter
Comprehensive Loss Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-10.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$288.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$288.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$205.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$205.00M	USD	1 Quarter

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