10-Q Filing

CMS ENERGY CORP CIK: 811156 Q3 2020

Filing Information

Form Type	10-Q
Accession Number	`0000811156-20-000017`
Period End Date	20200930
Filing Date	20201029
Fiscal Year	2020
Fiscal Period	Q3
XBRL Instance	cms10q20200930_form10q_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 116 Income Statement 112 Cash Flow Statement 68 Stockholders Equity 44 Comprehensive Income 68

Balance Sheet 116 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable and accrued revenue ALLOWANCE	`AllowanceForDoubtfulAccountsReceivableCurrent`	$20.00M	USD	Point-in-time
Accounts receivable and accrued revenue ALLOWANCE	`AllowanceForDoubtfulAccountsReceivableCurrent`	$30.00M	USD	Point-in-time
Notes receivable current ALLOWANCE	`AllowanceForNotesAndLoansReceivableCurrent`	$35.00M	USD	Point-in-time
Notes receivable current ALLOWANCE	`AllowanceForNotesAndLoansReceivableCurrent`	$33.00M	USD	Point-in-time
Accounts and notes receivable non-current ALLOWANCE	`AllowanceForNotesAndLoansReceivableNoncurrent`	$81.00M	USD	Point-in-time
Accounts and notes receivable non-current ALLOWANCE	`AllowanceForNotesAndLoansReceivableNoncurrent`	-	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$140.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$519.00M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$17.00M	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
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalentsAtCarryingValue`	$39.00M	USD	Point-in-time
Accounts receivable and accrued revenue, less allowance of $30 in 2020 and $20 in 2019	`AccountsReceivableNetCurrent`	$886.00M	USD	Point-in-time
Common stock, outstanding (in shares)	`CommonStockSharesOutstanding`	286.30M	shares	Point-in-time
Common stock, outstanding (in shares)	`CommonStockSharesOutstanding`	283.90M	shares	Point-in-time
Accounts receivable and accrued revenue, less allowance of $30 in 2020 and $20 in 2019	`AccountsReceivableNetCurrent`	$648.00M	USD	Point-in-time
Notes receivable, less allowance of $35 in 2020 and $33 in 2019	`NotesAndLoansReceivableNetCurrent`	$272.00M	USD	Point-in-time
Notes receivable, less allowance of $35 in 2020 and $33 in 2019	`NotesAndLoansReceivableNetCurrent`	$242.00M	USD	Point-in-time
Accounts and notes receivable related parties	`DueFromRelatedPartiesCurrent`	$17.00M	USD	Point-in-time
Accounts and notes receivable related parties	`DueFromRelatedPartiesCurrent`	$21.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$420.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$399.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$154.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$140.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$66.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$65.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$305.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$199.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$33.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$9.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$86.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$148.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.49B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.33B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$25.39B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$27.04B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.36B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.84B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$18.03B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$19.19B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.44B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$896.00M	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$18.93B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$20.63B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.75B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.49B	USD	Point-in-time
Accounts and notes receivable, less allowance	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$2.65B	USD	Point-in-time
Accounts and notes receivable, less allowance	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$2.28B	USD	Point-in-time
Investments	`EquityMethodInvestments`	$68.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$688.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$739.00M	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$6.16B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$5.58B	USD	Point-in-time
Total Assets	`Assets`	$29.28B	USD	Point-in-time
Total Assets	`Assets`	$26.84B	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationAndOtherFinancingCurrent`	$1.13B	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationAndOtherFinancingCurrent`	$1.80B	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	-	USD	Point-in-time
Notes payable	`NotesPayableCurrent`	$90.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$662.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$622.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$5.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$13.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$28.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$35.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$108.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$104.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$128.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$437.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$87.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$69.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$193.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$186.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.99B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.70B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$13.28B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$11.95B	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$61.00M	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$76.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.74B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.80B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$674.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$382.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$510.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$477.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$120.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$116.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.66B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.82B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$383.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$429.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$20.39B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$19.08B	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.22B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.11B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-79.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-73.00M	USD	Point-in-time
Retained earnings (accumulated deficit)	`RetainedEarningsAccumulatedDeficit`	$171.00M	USD	Point-in-time
Retained earnings (accumulated deficit)	`RetainedEarningsAccumulatedDeficit`	$-25.00M	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$5.32B	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$5.02B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$37.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$578.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.99B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.90B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.89B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$26.84B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$29.28B	USD	Point-in-time

Income Statement 112 line items

Line Item	Tag	Value	Unit	Period
Operating Revenue	`Revenues`	$1.57B	USD	1 Quarter
Operating Revenue	`Revenues`	$5.05B	USD	3 Qtrs
Operating Revenue	`Revenues`	$4.88B	USD	3 Qtrs
Operating Revenue	`Revenues`	$1.55B	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$391.00M	USD	3 Qtrs
Fuel for electric generation	`FuelCosts`	$274.00M	USD	3 Qtrs
Fuel for electric generation	`FuelCosts`	$130.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$108.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$19.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$53.00M	USD	3 Qtrs
Purchased power related parties	`PurchasedPowerRelatedParties`	$13.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$45.00M	USD	3 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$1.01B	USD	3 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$313.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$983.00M	USD	3 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$317.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$767.00M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$729.00M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$228.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$215.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$70.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$75.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$247.00M	USD	3 Qtrs
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$264.00M	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$4.12B	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$3.87B	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$1.20B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.21B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$928.00M	USD	3 Qtrs
Operating Income	`OperatingIncomeLoss`	$1.01B	USD	3 Qtrs
Operating Income	`OperatingIncomeLoss`	$351.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$369.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$1.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$2.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$3.00M	USD	3 Qtrs
Interest income	`InvestmentIncomeInterestAndDividend`	$5.00M	USD	3 Qtrs
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	$7.00M	USD	3 Qtrs
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	1 Quarter
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	3 Qtrs
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$4.00M	USD	3 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$1.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$2.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$7.00M	USD	3 Qtrs
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$6.00M	USD	3 Qtrs
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$5.00M	USD	1 Quarter
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	$1.00M	USD	3 Qtrs
Income from equity method investees	`IncomeLossFromEquityMethodInvestments`	-	USD	1 Quarter
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$29.00M	USD	1 Quarter
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$22.00M	USD	1 Quarter
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$68.00M	USD	3 Qtrs
Nonoperating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$90.00M	USD	3 Qtrs
Other income	`OtherNonoperatingIncome`	-	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$3.00M	USD	3 Qtrs
Other income	`OtherNonoperatingIncome`	$1.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$3.00M	USD	3 Qtrs
Other expense	`OtherNonoperatingExpense`	$9.00M	USD	3 Qtrs
Other expense	`OtherNonoperatingExpense`	$4.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	-	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$8.00M	USD	3 Qtrs
Total other income	`NonoperatingIncomeExpense`	$81.00M	USD	3 Qtrs
Total other income	`NonoperatingIncomeExpense`	$28.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$99.00M	USD	3 Qtrs
Total other income	`NonoperatingIncomeExpense`	$31.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$124.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$361.00M	USD	3 Qtrs
Interest on long-term debt	`InterestExpenseDebt`	$111.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$327.00M	USD	3 Qtrs
Interest expense related parties	`InterestExpenseRelatedParty`	$3.00M	USD	1 Quarter
Interest expense related parties	`InterestExpenseRelatedParty`	$6.00M	USD	3 Qtrs
Interest expense related parties	`InterestExpenseRelatedParty`	$9.00M	USD	3 Qtrs
Interest expense related parties	`InterestExpenseRelatedParty`	$3.00M	USD	1 Quarter
Other interest expense	`InterestExpenseOther`	$53.00M	USD	3 Qtrs
Other interest expense	`InterestExpenseOther`	$17.00M	USD	1 Quarter
Other interest expense	`InterestExpenseOther`	$55.00M	USD	3 Qtrs
Other interest expense	`InterestExpenseOther`	$20.00M	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$1.00M	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$1.00M	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$2.00M	USD	3 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$3.00M	USD	3 Qtrs
Total interest charges	`InterestExpense`	$421.00M	USD	3 Qtrs
Total interest charges	`InterestExpense`	$385.00M	USD	3 Qtrs
Total interest charges	`InterestExpense`	$133.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$143.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$254.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$688.00M	USD	3 Qtrs
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$624.00M	USD	3 Qtrs
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$249.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$98.00M	USD	3 Qtrs
Income Tax Expense	`IncomeTaxExpenseBenefit`	$42.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$44.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$110.00M	USD	3 Qtrs
Net Income	`ProfitLoss`	$514.00M	USD	3 Qtrs
Net Income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$590.00M	USD	3 Qtrs
Net Income	`ProfitLoss`	$207.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-7.00M	USD	3 Qtrs
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-8.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	3 Qtrs
Net Income Available to Common Stockholders	`NetIncomeLoss`	$597.00M	USD	3 Qtrs
Net Income Available to Common Stockholders	`NetIncomeLoss`	$513.00M	USD	3 Qtrs
Net Income Available to Common Stockholders	`NetIncomeLoss`	$218.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$207.00M	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.73	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.81	USD	3 Qtrs
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$2.10	USD	3 Qtrs
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.76	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.73	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.81	USD	3 Qtrs
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$2.09	USD	3 Qtrs
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.76	USD	1 Quarter

Cash Flow Statement 68 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$514.00M	USD	3 Qtrs
Net income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net income	`ProfitLoss`	$590.00M	USD	3 Qtrs
Net income	`ProfitLoss`	$207.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$767.00M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$729.00M	USD	3 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$228.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$215.00M	USD	1 Quarter
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$89.00M	USD	3 Qtrs
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$140.00M	USD	3 Qtrs
Pension contributions	`PensionAndOtherPostretirementBenefitContributions`	-	USD	3 Qtrs
Pension contributions	`PensionAndOtherPostretirementBenefitContributions`	$531.00M	USD	3 Qtrs
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$-24.00M	USD	3 Qtrs
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$11.00M	USD	3 Qtrs
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-218.00M	USD	3 Qtrs
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-297.00M	USD	3 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$49.00M	USD	3 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$34.00M	USD	3 Qtrs
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$29.00M	USD	3 Qtrs
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-82.00M	USD	3 Qtrs
Other current and non-current assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$92.00M	USD	3 Qtrs
Other current and non-current assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$59.00M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.14B	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.40B	USD	3 Qtrs
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.70B	USD	3 Qtrs
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.57B	USD	3 Qtrs
Increase in EnerBank notes receivable	`PaymentsToAcquireLoansReceivable`	$480.00M	USD	3 Qtrs
Increase in EnerBank notes receivable	`PaymentsToAcquireLoansReceivable`	$328.00M	USD	3 Qtrs
Purchase of notes receivable by EnerBank	`PaymentsToAcquireNotesReceivable`	$17.00M	USD	3 Qtrs
Purchase of notes receivable by EnerBank	`PaymentsToAcquireNotesReceivable`	$307.00M	USD	3 Qtrs
Proceeds from sale of transmission equipment	`ProceedsFromSaleOfProductiveAssets`	$96.00M	USD	3 Qtrs
Proceeds from sale of transmission equipment	`ProceedsFromSaleOfProductiveAssets`	-	USD	3 Qtrs
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$104.00M	USD	3 Qtrs
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$103.00M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.21B	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.30B	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.08B	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.35B	USD	3 Qtrs
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.29B	USD	3 Qtrs
Retirement of debt	`RepaymentsOfLongTermDebt`	$1.17B	USD	3 Qtrs
Increase in EnerBank certificates of deposit	`IncreaseDecreaseInTimeDeposits`	$456.00M	USD	3 Qtrs
Increase in EnerBank certificates of deposit	`IncreaseDecreaseInTimeDeposits`	$622.00M	USD	3 Qtrs
Decrease in notes payable	`RepaymentsOfShortTermDebt`	$97.00M	USD	3 Qtrs
Decrease in notes payable	`RepaymentsOfShortTermDebt`	$90.00M	USD	3 Qtrs
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$107.00M	USD	3 Qtrs
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$9.00M	USD	3 Qtrs
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$351.00M	USD	3 Qtrs
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$326.00M	USD	3 Qtrs
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	$417.00M	USD	3 Qtrs
Proceeds from the sale of membership interest in VIE to tax equity investor	`ProceedsFromSaleOfInterestInPartnershipUnit`	-	USD	3 Qtrs
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	-	USD	3 Qtrs
Contribution from noncontrolling interest	`ProceedsFromMinorityShareholders`	$31.00M	USD	3 Qtrs
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-74.00M	USD	3 Qtrs
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-39.00M	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.55B	USD	3 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.07B	USD	3 Qtrs
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$401.00M	USD	3 Qtrs
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$258.00M	USD	3 Qtrs
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$433.00M	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`	$157.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$558.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$433.00M	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`	$157.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$558.00M	USD	Point-in-time
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$135.00M	USD	3 Qtrs
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$140.00M	USD	3 Qtrs

Stockholders Equity 44 line items

Line Item	Tag	Value	Unit	Period
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.99B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.90B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.89B	USD	Point-in-time
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-5.00M	USD	1 Quarter
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-5.00M	USD	3 Qtrs
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Net loss arising during the period	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	3 Qtrs
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	1 Quarter
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	1 Quarter
Settlement arising during the period	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	3 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	3 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	3 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	3 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	3 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	-	USD	1 Quarter
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-1.00M	USD	1 Quarter
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-3.00M	USD	3 Qtrs
Unrealized loss on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-5.00M	USD	3 Qtrs
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	1 Quarter
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	1 Quarter
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	3 Qtrs
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	3 Qtrs
Net income	`ProfitLoss`	$514.00M	USD	3 Qtrs
Net income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net income	`ProfitLoss`	$590.00M	USD	3 Qtrs
Net income	`ProfitLoss`	$207.00M	USD	1 Quarter
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.99B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.79B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.90B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$4.89B	USD	Point-in-time
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.41	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.38	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.15	USD	3 Qtrs
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$1.22	USD	3 Qtrs

Comprehensive Income 68 line items

Line Item	Tag	Value	Unit	Period
Net loss arising during the period, TAX BENEFIT	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	3 Qtrs
Net income	`ProfitLoss`	$514.00M	USD	3 Qtrs
Net income	`ProfitLoss`	$210.00M	USD	1 Quarter
Net income	`ProfitLoss`	$590.00M	USD	3 Qtrs
Net loss arising during the period, TAX BENEFIT	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-2.00M	USD	3 Qtrs
Net loss arising during the period, TAX BENEFIT	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	1 Quarter
Net loss arising during the period, TAX BENEFIT	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-2.00M	USD	1 Quarter
Net income	`ProfitLoss`	$207.00M	USD	1 Quarter
Settlement arising during the period, TAX	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	3 Qtrs
Settlement arising during the period, TAX	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	3 Qtrs
Settlement arising during the period, TAX	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	1 Quarter
Settlement arising during the period, TAX	`OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax`	-	USD	1 Quarter
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Net loss arising during the period, net of tax of $(2), $-, $(2), and $-	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-5.00M	USD	1 Quarter
Net loss arising during the period, net of tax of $(2), $-, $(2), and $-	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-5.00M	USD	3 Qtrs
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	1 Quarter
Net loss arising during the period, net of tax of $(2), $-, $(2), and $-	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	3 Qtrs
Net loss arising during the period, net of tax of $(2), $-, $(2), and $-	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$1.00M	USD	3 Qtrs
Settlement arising during the period, net of tax of $- for all periods	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	3 Qtrs
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	3 Qtrs
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	1 Quarter
Settlement arising during the period, net of tax of $- for all periods	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	1 Quarter
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	1 Quarter
Settlement arising during the period, net of tax of $- for all periods	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	-	USD	1 Quarter
Settlement arising during the period, net of tax of $- for all periods	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax`	$1.00M	USD	3 Qtrs
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	3 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	3 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Unrealized loss on derivative instruments, TAX BENEFIT	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-1.00M	USD	3 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	3 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments, TAX BENEFIT	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-1.00M	USD	3 Qtrs
Unrealized loss on derivative instruments, TAX BENEFIT	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments, TAX BENEFIT	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Amortization of prior service credit, net of tax of $- for all periods	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	3 Qtrs
Amortization of prior service credit, net of tax of $- for all periods	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	3 Qtrs
Amortization of prior service credit, net of tax of $- for all periods	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	-	USD	1 Quarter
Amortization of prior service credit, net of tax of $- for all periods	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	3 Qtrs
Reclassification adjustments included in net income, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	3 Qtrs
Unrealized loss on derivative instruments, net of tax of $-, $-, $(1), and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-1.00M	USD	1 Quarter
Unrealized loss on derivative instruments, net of tax of $-, $-, $(1), and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments, net of tax of $-, $-, $(1), and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-3.00M	USD	3 Qtrs
Unrealized loss on derivative instruments, net of tax of $-, $-, $(1), and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-5.00M	USD	3 Qtrs
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	1 Quarter
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	1 Quarter
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-1.00M	USD	3 Qtrs
Reclassification adjustments included in net income	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	3 Qtrs
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	-	USD	1 Quarter
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	$-2.00M	USD	3 Qtrs
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	$-6.00M	USD	3 Qtrs
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTax`	$-3.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$584.00M	USD	3 Qtrs
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$512.00M	USD	3 Qtrs
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$207.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$207.00M	USD	1 Quarter
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	3 Qtrs
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-7.00M	USD	3 Qtrs
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-8.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$591.00M	USD	3 Qtrs
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$207.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$215.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$511.00M	USD	3 Qtrs

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