10-Q Filing

CMS ENERGY CORP CIK: 811156 Q2 2021

Filing Information

Form Type	10-Q
Accession Number	`0000811156-21-000054`
Period End Date	20210630
Filing Date	20210729
Fiscal Year	2021
Fiscal Period	Q2
XBRL Instance	cms-20210630_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 116 Income Statement 136 Cash Flow Statement 64 Stockholders Equity 36 Comprehensive Income 52

Balance Sheet 116 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable and accrued revenue, ALLOWANCE	`AllowanceForDoubtfulAccountsReceivableCurrent`	$27.00M	USD	Point-in-time
Accounts receivable and accrued revenue, ALLOWANCE	`AllowanceForDoubtfulAccountsReceivableCurrent`	$29.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$153.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.00M	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`	$18.00M	USD	Point-in-time
Accounts receivable and accrued revenue	`AccountsReceivableNetCurrent`	$745.00M	USD	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	289.70M	shares	Point-in-time
Common stock outstanding (in shares)	`CommonStockSharesOutstanding`	288.90M	shares	Point-in-time
Accounts receivable and accrued revenue	`AccountsReceivableNetCurrent`	$853.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$19.00M	USD	Point-in-time
Accounts receivable related parties	`DueFromRelatedPartiesCurrent`	$16.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$353.00M	USD	Point-in-time
Gas in underground storage	`EnergyRelatedInventoryGasStoredUnderground`	$318.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$155.00M	USD	Point-in-time
Materials and supplies	`OtherInventorySupplies`	$172.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$49.00M	USD	Point-in-time
Generating plant fuel stock	`EnergyRelatedInventoryOtherFossilFuel`	$68.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$332.00M	USD	Point-in-time
Deferred property taxes	`DeferredPropertyTaxes`	$243.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$42.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$21.00M	USD	Point-in-time
Assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$448.00M	USD	Point-in-time
Assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$429.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$139.00M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$104.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.32B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.40B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$27.87B	USD	Point-in-time
Plant, property, and equipment, gross	`PropertyPlantAndEquipmentGrossExcludingCWIP`	$29.03B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$7.94B	USD	Point-in-time
Less accumulated depreciation and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$8.33B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$19.93B	USD	Point-in-time
Plant, property, and equipment, net	`PropertyPlantAndEquipmentNetExcludingCWIP`	$20.70B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$1.08B	USD	Point-in-time
Construction work in progress	`ConstructionInProgressGross`	$832.00M	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$21.53B	USD	Point-in-time
Total plant, property, and equipment	`PropertyPlantAndEquipmentNet`	$21.02B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.61B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$2.65B	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$19.00M	USD	Point-in-time
Accounts receivable	`LongTermAccountsNotesAndLoansReceivableNetNoncurrent`	$18.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$70.00M	USD	Point-in-time
Investments	`EquityMethodInvestments`	$71.00M	USD	Point-in-time
Assets held for sale	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	$2.68B	USD	Point-in-time
Assets held for sale	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	$2.58B	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$819.00M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$823.00M	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$6.25B	USD	Point-in-time
Total other non-current assets	`AssetsNoncurrentOtherThanPropertyPlantAndEquipment`	$6.10B	USD	Point-in-time
Total Assets	`Assets`	$29.95B	USD	Point-in-time
Total Assets	`Assets`	$29.67B	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationCurrentAndOtherFinancingCurrent`	$591.00M	USD	Point-in-time
Current portion of long-term debt, finance leases, and other financing	`LongTermDebtCurrentMaturitiesLeaseObligationCurrentAndOtherFinancingCurrent`	$589.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$661.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$659.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$7.00M	USD	Point-in-time
Accounts payable related parties	`DueToRelatedPartiesCurrent`	$7.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$21.00M	USD	Point-in-time
Accrued rate refunds	`AccruedRateRefunds`	$20.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$104.00M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$103.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$357.00M	USD	Point-in-time
Accrued taxes	`TaxesPayableCurrent`	$454.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$214.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$151.00M	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$953.00M	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$990.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$133.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$174.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.11B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.07B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$11.73B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$11.74B	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$50.00M	USD	Point-in-time
Non-current portion of finance leases and other financing	`FinanceLeaseLiabilityAndOtherNoncurrent`	$56.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.76B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$3.74B	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$152.00M	USD	Point-in-time
Postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$149.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$553.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$607.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$113.00M	USD	Point-in-time
Deferred investment tax credit	`AccumulatedDeferredInvestmentTaxCredit`	$115.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.86B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.97B	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$1.89B	USD	Point-in-time
Liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$1.72B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$382.00M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$394.00M	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$20.52B	USD	Point-in-time
Total non-current liabilities	`LiabilitiesNoncurrent`	$20.47B	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`	$5.39B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$5.37B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-82.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-86.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$214.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$487.00M	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$5.50B	USD	Point-in-time
Total common stockholders equity	`StockholdersEquity`	$5.80B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$581.00M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$569.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.22B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.37B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$29.95B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$29.67B	USD	Point-in-time

Income Statement 136 line items

Line Item	Tag	Value	Unit	Period
Operating Revenue	`Revenues`	$1.56B	USD	1 Quarter
Operating Revenue	`Revenues`	$3.57B	USD	2 Qtrs
Operating Revenue	`Revenues`	$3.18B	USD	2 Qtrs
Operating Revenue	`Revenues`	$1.38B	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$166.00M	USD	2 Qtrs
Fuel for electric generation	`FuelCosts`	$63.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$116.00M	USD	1 Quarter
Fuel for electric generation	`FuelCosts`	$254.00M	USD	2 Qtrs
Purchased power related parties	`PurchasedPowerRelatedParties`	$17.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$14.00M	USD	1 Quarter
Purchased power related parties	`PurchasedPowerRelatedParties`	$35.00M	USD	2 Qtrs
Purchased power related parties	`PurchasedPowerRelatedParties`	$32.00M	USD	2 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$666.00M	USD	2 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$604.00M	USD	2 Qtrs
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$355.00M	USD	1 Quarter
Maintenance and other operating expenses	`OtherCostAndExpenseOperating`	$316.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$222.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$582.00M	USD	2 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$244.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$537.00M	USD	2 Qtrs
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$87.00M	USD	1 Quarter
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$188.00M	USD	2 Qtrs
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$209.00M	USD	2 Qtrs
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$75.00M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.60B	USD	2 Qtrs
Total operating expenses	`CostsAndExpenses`	$1.31B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.89B	USD	2 Qtrs
Total operating expenses	`CostsAndExpenses`	$1.13B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$583.00M	USD	2 Qtrs
Operating Income	`OperatingIncomeLoss`	$682.00M	USD	2 Qtrs
Operating Income	`OperatingIncomeLoss`	$248.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$252.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$2.00M	USD	2 Qtrs
Interest income	`InvestmentIncomeInterestAndDividend`	$1.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$2.00M	USD	2 Qtrs
Interest income	`InvestmentIncomeInterestAndDividend`	$1.00M	USD	1 Quarter
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	2 Qtrs
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	$7.00M	USD	2 Qtrs
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	1 Quarter
Interest and dividend income related parties	`InterestAndDividendIncomeRelatedParties`	-	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$2.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$3.00M	USD	2 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$3.00M	USD	2 Qtrs
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$2.00M	USD	1 Quarter
Income (loss) from equity method investees	`IncomeLossFromEquityMethodInvestments`	$4.00M	USD	2 Qtrs
Income (loss) from equity method investees	`IncomeLossFromEquityMethodInvestments`	$-2.00M	USD	1 Quarter
Income (loss) from equity method investees	`IncomeLossFromEquityMethodInvestments`	$1.00M	USD	2 Qtrs
Income (loss) from equity method investees	`IncomeLossFromEquityMethodInvestments`	$2.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$81.00M	USD	2 Qtrs
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$40.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$30.00M	USD	1 Quarter
Non-operating retirement benefits, net	`OtherNonoperatingIncomeExpenseRetirementBenefitsNet`	$61.00M	USD	2 Qtrs
Other income	`OtherNonoperatingIncome`	$2.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$5.00M	USD	1 Quarter
Other income	`OtherNonoperatingIncome`	$2.00M	USD	2 Qtrs
Other income	`OtherNonoperatingIncome`	$6.00M	USD	2 Qtrs
Other expense	`OtherNonoperatingExpense`	$2.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$1.00M	USD	1 Quarter
Other expense	`OtherNonoperatingExpense`	$5.00M	USD	2 Qtrs
Other expense	`OtherNonoperatingExpense`	$4.00M	USD	2 Qtrs
Total other income	`NonoperatingIncomeExpense`	$71.00M	USD	2 Qtrs
Total other income	`NonoperatingIncomeExpense`	$92.00M	USD	2 Qtrs
Total other income	`NonoperatingIncomeExpense`	$48.00M	USD	1 Quarter
Total other income	`NonoperatingIncomeExpense`	$32.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$120.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$121.00M	USD	1 Quarter
Interest on long-term debt	`InterestExpenseDebt`	$237.00M	USD	2 Qtrs
Interest on long-term debt	`InterestExpenseDebt`	$239.00M	USD	2 Qtrs
Interest expense related parties	`InterestExpenseRelatedParty`	$3.00M	USD	1 Quarter
Interest expense related parties	`InterestExpenseRelatedParty`	$6.00M	USD	2 Qtrs
Interest expense related parties	`InterestExpenseRelatedParty`	$3.00M	USD	1 Quarter
Interest expense related parties	`InterestExpenseRelatedParty`	$6.00M	USD	2 Qtrs
Other interest expense	`InterestExpenseOther`	$6.00M	USD	2 Qtrs
Other interest expense	`InterestExpenseOther`	$3.00M	USD	1 Quarter
Other interest expense	`InterestExpenseOther`	$5.00M	USD	2 Qtrs
Other interest expense	`InterestExpenseOther`	$2.00M	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$1.00M	USD	2 Qtrs
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	-	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	-	USD	1 Quarter
Allowance for borrowed funds used during construction	`InterestCostsCapitalizedAdjustment`	$1.00M	USD	2 Qtrs
Total interest charges	`InterestExpense`	$127.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$125.00M	USD	1 Quarter
Total interest charges	`InterestExpense`	$248.00M	USD	2 Qtrs
Total interest charges	`InterestExpense`	$249.00M	USD	2 Qtrs
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$175.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$153.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$525.00M	USD	2 Qtrs
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$406.00M	USD	2 Qtrs
Income Tax Expense	`IncomeTaxExpenseBenefit`	$64.00M	USD	2 Qtrs
Income Tax Expense	`IncomeTaxExpenseBenefit`	$22.00M	USD	1 Quarter
Income Tax Expense	`IncomeTaxExpenseBenefit`	$48.00M	USD	2 Qtrs
Income Tax Expense	`IncomeTaxExpenseBenefit`	$24.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$129.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$358.00M	USD	2 Qtrs
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$153.00M	USD	1 Quarter
Income From Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$461.00M	USD	2 Qtrs
Income From Discontinued Operations, Net of Tax of $7, $3, $16, and $6	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$8.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $7, $3, $16, and $6	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$52.00M	USD	2 Qtrs
Income From Discontinued Operations, Net of Tax of $7, $3, $16, and $6	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$18.00M	USD	1 Quarter
Income From Discontinued Operations, Net of Tax of $7, $3, $16, and $6	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$22.00M	USD	2 Qtrs
Net Income	`ProfitLoss`	$513.00M	USD	2 Qtrs
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$380.00M	USD	2 Qtrs
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-5.00M	USD	1 Quarter
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-12.00M	USD	2 Qtrs
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	2 Qtrs
Income (Loss) Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$136.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$176.00M	USD	1 Quarter
Net Income Available to Common Stockholders	`NetIncomeLoss`	$379.00M	USD	2 Qtrs
Net Income Available to Common Stockholders	`NetIncomeLoss`	$525.00M	USD	2 Qtrs
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.64	USD	2 Qtrs
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.25	USD	2 Qtrs
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.45	USD	1 Quarter
Basic earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.55	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.08	USD	2 Qtrs
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.03	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.06	USD	1 Quarter
Basic earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.18	USD	2 Qtrs
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.61	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$0.48	USD	1 Quarter
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.82	USD	2 Qtrs
Basic earnings per average common share (in dollars per share)	`EarningsPerShareBasic`	$1.33	USD	2 Qtrs
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.45	USD	1 Quarter
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.25	USD	2 Qtrs
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.64	USD	2 Qtrs
Diluted earnings per average common share, income from continuing operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.55	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.08	USD	2 Qtrs
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.03	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.06	USD	1 Quarter
Diluted earnings per average common share, income from discontinued operations per average common share available to common stockholders (in dollars per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.18	USD	2 Qtrs
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.82	USD	2 Qtrs
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.61	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$0.48	USD	1 Quarter
Diluted earnings per average common share (in dollars per share)	`EarningsPerShareDiluted`	$1.33	USD	2 Qtrs

Cash Flow Statement 64 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$513.00M	USD	2 Qtrs
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$380.00M	USD	2 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$222.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$582.00M	USD	2 Qtrs
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$244.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$537.00M	USD	2 Qtrs
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$75.00M	USD	2 Qtrs
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndTaxCredits`	$95.00M	USD	2 Qtrs
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$5.00M	USD	2 Qtrs
Other non-cash operating activities and reconciling adjustments	`OtherNoncashIncomeExpense`	$29.00M	USD	2 Qtrs
Pension contributions	`PensionAndOtherPostretirementBenefitContributions`	$531.00M	USD	2 Qtrs
Pension contributions	`PensionAndOtherPostretirementBenefitContributions`	-	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$22.00M	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-23.00M	USD	2 Qtrs
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-101.00M	USD	2 Qtrs
Accounts and notes receivable and accrued revenue	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-132.00M	USD	2 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$-36.00M	USD	2 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$-99.00M	USD	2 Qtrs
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	-	USD	2 Qtrs
Accounts payable and accrued rate refunds	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$17.00M	USD	2 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-78.00M	USD	2 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-13.00M	USD	2 Qtrs
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-34.00M	USD	2 Qtrs
Other non-current assets and liabilities	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$-37.00M	USD	2 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.37B	USD	2 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$796.00M	USD	2 Qtrs
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$944.00M	USD	2 Qtrs
Capital expenditures (excludes assets placed under finance lease)	`PaymentsToAcquirePropertyPlantAndEquipment`	$878.00M	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-167.00M	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$90.00M	USD	2 Qtrs
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$57.00M	USD	2 Qtrs
Cost to retire property and other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$63.00M	USD	2 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.17B	USD	2 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-851.00M	USD	2 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.35B	USD	2 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	2 Qtrs
Retirement of debt	`RepaymentsOfLongTermDebt`	$18.00M	USD	2 Qtrs
Retirement of debt	`RepaymentsOfLongTermDebt`	$392.00M	USD	2 Qtrs
Decrease in notes payable	`RepaymentsOfShortTermDebt`	-	USD	2 Qtrs
Decrease in notes payable	`RepaymentsOfShortTermDebt`	$90.00M	USD	2 Qtrs
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$104.00M	USD	2 Qtrs
Issuance of common stock, net of issuance costs	`ProceedsFromIssuanceOfCommonStock`	$20.00M	USD	2 Qtrs
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$234.00M	USD	2 Qtrs
Payment of dividends on common and preferred stock	`PaymentsOfOrdinaryDividends`	$253.00M	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$132.00M	USD	2 Qtrs
Net cash provided by (used in) discontinued operations	`CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations`	$-138.00M	USD	2 Qtrs
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-20.00M	USD	2 Qtrs
Other financing costs	`ProceedsFromPaymentsForOtherFinancingActivities`	$-54.00M	USD	2 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.82B	USD	2 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-409.00M	USD	2 Qtrs
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$107.00M	USD	2 Qtrs
Net Increase in Cash and Cash Equivalents, Including Restricted Amounts	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$1.45B	USD	2 Qtrs
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$185.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.60B	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$292.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$157.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$185.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.60B	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$292.00M	USD	Point-in-time
Cash and Cash Equivalents, Including Restricted Amounts, End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$157.00M	USD	Point-in-time
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$138.00M	USD	2 Qtrs
Capital expenditures not paid	`CapitalExpendituresIncurredButNotYetPaid`	$167.00M	USD	2 Qtrs

Stockholders Equity 36 line items

Line Item	Tag	Value	Unit	Period
Tax effect of discontinued operation	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$6.00M	USD	2 Qtrs
Tax effect of discontinued operation	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$3.00M	USD	1 Quarter
Tax effect of discontinued operation	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$16.00M	USD	2 Qtrs
Tax effect of discontinued operation	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$7.00M	USD	1 Quarter
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.22B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total Equity at Beginning of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.37B	USD	Point-in-time
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	2 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	2 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	2 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$1.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Net Income	`ProfitLoss`	$513.00M	USD	2 Qtrs
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$380.00M	USD	2 Qtrs
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.22B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.08B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.05B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.25B	USD	Point-in-time
Total Equity at End of Period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.37B	USD	Point-in-time
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.43	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.81	USD	2 Qtrs
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.87	USD	2 Qtrs
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.41	USD	1 Quarter

Comprehensive Income 52 line items

Line Item	Tag	Value	Unit	Period
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$513.00M	USD	2 Qtrs
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	2 Qtrs
Net Income	`ProfitLoss`	$171.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$137.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$380.00M	USD	2 Qtrs
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	2 Qtrs
Amortization of net actuarial loss, TAX	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-1.00M	USD	1 Quarter
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	2 Qtrs
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	2 Qtrs
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	1 Quarter
Amortization of prior service credit, TAX	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.00M	USD	1 Quarter
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	2 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.00M	USD	2 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-3.00M	USD	1 Quarter
Unrealized loss on derivative instruments, TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	$-1.00M	USD	2 Qtrs
Amortization of net actuarial loss, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-2.00M	USD	2 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	2 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	1 Quarter
Reclassification adjustments included in net income , TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	2 Qtrs
Reclassification adjustments included in net income , TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	-	USD	1 Quarter
Reclassification adjustments included in net income , TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$1.00M	USD	1 Quarter
Reclassification adjustments included in net income , TAX	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$1.00M	USD	2 Qtrs
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	1 Quarter
Amortization of prior service credit	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-1.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments, net of tax of $, $, $, and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments, net of tax of $, $, $, and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Unrealized gain (loss) on derivative instruments, net of tax of $, $, $, and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$1.00M	USD	2 Qtrs
Unrealized gain (loss) on derivative instruments, net of tax of $, $, $, and $(1)	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, net of tax of $1, $, $1, and $	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	2 Qtrs
Reclassification adjustments included in net income, net of tax of $1, $, $1, and $	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, net of tax of $1, $, $1, and $	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	1 Quarter
Reclassification adjustments included in net income, net of tax of $1, $, $1, and $	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	-	USD	2 Qtrs
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$2.00M	USD	1 Quarter
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-3.00M	USD	2 Qtrs
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	-	USD	1 Quarter
Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$4.00M	USD	2 Qtrs
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$173.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$377.00M	USD	2 Qtrs
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$517.00M	USD	2 Qtrs
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$137.00M	USD	1 Quarter
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-12.00M	USD	2 Qtrs
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-5.00M	USD	1 Quarter
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	2 Qtrs
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$136.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$376.00M	USD	2 Qtrs
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$178.00M	USD	1 Quarter
Comprehensive Income Attributable to CMS Energy	`ComprehensiveIncomeNetOfTax`	$529.00M	USD	2 Qtrs

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