10-K Filing

AMEREN CORP CIK: 1002910 FY 2016

Filing Information

Form Type	10-K
Accession Number	`0001002910-17-000054`
Period End Date	20161231
Filing Date	20170228
Fiscal Year	2016
Fiscal Period	FY
XBRL Instance	aee-20161231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 98 Income Statement 207 Cash Flow Statement 151 Stockholders Equity 39 Comprehensive Income 24

Balance Sheet 98 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$19.00M	USD	Point-in-time
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$19.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$30.00M	USD	Point-in-time
Common stock, par value	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$5.00M	USD	Point-in-time
Common stock, par value	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$9.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$292.00M	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$388.00M	USD	Point-in-time
Common stock, shares outstanding	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$437.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$295.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$239.00M	USD	Point-in-time
Miscellaneous accounts and notes receivable	`OtherReceivablesNetCurrent`	$63.00M	USD	Point-in-time
Miscellaneous accounts and notes receivable	`OtherReceivablesNetCurrent`	$98.00M	USD	Point-in-time
Inventories	`InventoryNet`	$527.00M	USD	Point-in-time
Inventories	`InventoryNet`	$538.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$260.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$149.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$88.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$98.00M	USD	Point-in-time
Assets of discontinued operations (Note 1)	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$14.00M	USD	Point-in-time
Assets of discontinued operations (Note 1)	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$15.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.59B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.92B	USD	Point-in-time
Property, Plant and Equipment, Net	`PropertyPlantAndEquipmentNet`	$18.80B	USD	Point-in-time
Property, Plant and Equipment, Net	`PropertyPlantAndEquipmentNet`	$20.11B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$556.00M	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$607.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.44B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.38B	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$575.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$538.00M	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$2.99B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$2.92B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$24.70B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$23.64B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$681.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$395.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$558.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$301.00M	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$777.00M	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$805.00M	USD	Point-in-time
Taxes accrued	`TaxesPayableCurrent`	$46.00M	USD	Point-in-time
Taxes accrued	`TaxesPayableCurrent`	$43.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$93.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$89.00M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$100.00M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$107.00M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$110.00M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$80.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$248.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$279.00M	USD	Point-in-time
Liabilities of discontinued operations (Note 1)	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$29.00M	USD	Point-in-time
Liabilities of discontinued operations (Note 1)	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$26.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.09B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.67B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$6.59B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$6.88B	USD	Point-in-time
Accumulated deferred income taxes, net	`DeferredTaxLiabilitiesNoncurrent`	$4.26B	USD	Point-in-time
Accumulated deferred income taxes, net	`DeferredTaxLiabilitiesNoncurrent`	$3.88B	USD	Point-in-time
Accumulated deferred investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$60.00M	USD	Point-in-time
Accumulated deferred investment tax credits	`AccumulatedDeferredInvestmentTaxCredit`	$55.00M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$1.99B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$1.91B	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$618.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$635.00M	USD	Point-in-time
Pension and other postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$769.00M	USD	Point-in-time
Pension and other postretirement benefits	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$580.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$477.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$531.00M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$8.19B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$7.58B	USD	Point-in-time
Commitments and Contingencies (Notes 2, 10, 14 and 15)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies (Notes 2, 10, 14 and 15)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$5.56B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$5.62B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.57B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.33B	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-3.00M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-23.00M	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$7.10B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$6.95B	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$142.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$142.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.25B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.86B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.09B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$23.64B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$24.70B	USD	Point-in-time

Income Statement 207 line items

Line Item	Tag	Value	Unit	Period
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-7.00M	USD	Annual
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-7.00M	USD	Annual
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$3.00M	USD	Annual
Electric	`ElectricUtilityRevenue`	$5.20B	USD	Annual
Electric	`ElectricUtilityRevenue`	$5.18B	USD	Annual
Electric	`ElectricUtilityRevenue`	$4.91B	USD	Annual
Gas	`GasDomesticRegulatedRevenue`	$918.00M	USD	Annual
Gas	`GasDomesticRegulatedRevenue`	$880.00M	USD	Annual
Gas	`GasDomesticRegulatedRevenue`	$1.14B	USD	Annual
Total operating revenues	`Revenues`	$1.43B	USD	1 Quarter
Total operating revenues	`Revenues`	$6.10B	USD	Annual
Total operating revenues	`Revenues`	$1.83B	USD	1 Quarter
Total operating revenues	`Revenues`	$1.36B	USD	1 Quarter
Total operating revenues	`Revenues`	$1.31B	USD	1 Quarter
Total operating revenues	`Revenues`	$6.05B	USD	Annual
Total operating revenues	`Revenues`	$1.40B	USD	1 Quarter
Total operating revenues	`Revenues`	$1.86B	USD	1 Quarter
Total operating revenues	`Revenues`	$1.56B	USD	1 Quarter
Total operating revenues	`Revenues`	$1.43B	USD	1 Quarter
Total operating revenues	`Revenues`	$6.08B	USD	Annual
Fuel	`FuelCosts`	$826.00M	USD	Annual
Fuel	`FuelCosts`	$745.00M	USD	Annual
Fuel	`FuelCosts`	$878.00M	USD	Annual
Purchased power	`CostOfPurchasedPower`	$621.00M	USD	Annual
Purchased power	`CostOfPurchasedPower`	$514.00M	USD	Annual
Purchased power	`CostOfPurchasedPower`	$461.00M	USD	Annual
Gas purchased for resale	`CostOfNaturalGasPurchases`	$341.00M	USD	Annual
Gas purchased for resale	`CostOfNaturalGasPurchases`	$415.00M	USD	Annual
Gas purchased for resale	`CostOfNaturalGasPurchases`	$615.00M	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.68B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.68B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.69B	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	-	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	$69.00M	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	-	USD	Annual
Depreciation and amortization	`CostOfGoodsSoldDepreciationDepletionAndAmortization`	$796.00M	USD	Annual
Depreciation and amortization	`CostOfGoodsSoldDepreciationDepletionAndAmortization`	$745.00M	USD	Annual
Depreciation and amortization	`CostOfGoodsSoldDepreciationDepletionAndAmortization`	$845.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$467.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$473.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$468.00M	USD	Annual
Total operating expenses	`OperatingExpenses`	$4.70B	USD	Annual
Total operating expenses	`OperatingExpenses`	$4.80B	USD	Annual
Total operating expenses	`OperatingExpenses`	$4.84B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$691.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$325.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$237.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.38B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$626.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$256.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$1.25B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.26B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$220.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$145.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$140.00M	USD	1 Quarter
Miscellaneous income	`OtherNonoperatingIncome`	$74.00M	USD	Annual
Miscellaneous income	`OtherNonoperatingIncome`	$79.00M	USD	Annual
Miscellaneous income	`OtherNonoperatingIncome`	$74.00M	USD	Annual
Miscellaneous expense	`OtherNonoperatingExpense`	$22.00M	USD	Annual
Miscellaneous expense	`OtherNonoperatingExpense`	$32.00M	USD	Annual
Miscellaneous expense	`OtherNonoperatingExpense`	$30.00M	USD	Annual
Total other income (expense)	`OtherNonoperatingIncomeExpense`	$42.00M	USD	Annual
Total other income (expense)	`OtherNonoperatingIncomeExpense`	$57.00M	USD	Annual
Total other income (expense)	`OtherNonoperatingIncomeExpense`	$44.00M	USD	Annual
Interest charges	`InterestExpense`	$382.00M	USD	Annual
Interest charges	`InterestExpense`	$341.00M	USD	Annual
Interest charges	`InterestExpense`	$355.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$970.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$1.04B	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$948.00M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$377.00M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$382.00M	USD	Annual
Income taxes	`IncomeTaxExpenseBenefit`	$363.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$585.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$593.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$659.00M	USD	Annual
Income (Loss) from Discontinued Operations, Net of Tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$51.00M	USD	Annual
Income (Loss) from Discontinued Operations, Net of Tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$-1.00M	USD	Annual
Income (Loss) from Discontinued Operations, Net of Tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	-	USD	Annual
Net Income (Loss)	`ProfitLoss`	$345.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$33.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$592.00M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$659.00M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$148.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$636.00M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$151.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$30.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$110.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$107.00M	USD	1 Quarter
Net Income (Loss)	`ProfitLoss`	$371.00M	USD	1 Quarter
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$20.00M	USD	Annual
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$12.00M	USD	Annual
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-6.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$574.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$636.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$633.00M	USD	Annual
Continuing Operations	`IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity`	$6.00M	USD	Annual
Continuing Operations	`IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity`	$6.00M	USD	Annual
Continuing Operations	`IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity`	$6.00M	USD	Annual
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$30.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$105.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$653.00M	USD	Annual
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$343.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$108.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$369.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$579.00M	USD	Annual
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$147.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$587.00M	USD	Annual
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$98.00M	USD	1 Quarter
Net income attributable to Ameren Corporation - continuing operations	`IncomeLossFromContinuingOperations`	$32.00M	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.00M	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$52.00M	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.00M	USD	Annual
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$51.00M	USD	Annual
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Discontinued Operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$343.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$653.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$150.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$586.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$147.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$108.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$630.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$29.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$369.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$32.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$105.00M	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.40	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.43	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.69	USD	Annual
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.39	USD	Annual
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.42	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.13	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.61	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.42	USD	Annual
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.52	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.12	USD	1 Quarter
Continuing Operations - Basic	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.45	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	Annual
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.21	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.21	USD	Annual
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued Operations - Basic	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	-	USD	Annual
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$1.42	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.61	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$2.69	USD	Annual
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.12	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.45	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$1.52	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.43	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.61	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$0.13	USD	1 Quarter
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$2.60	USD	Annual
Earnings (Loss) per Common Share Basic	`EarningsPerShareBasic`	$2.42	USD	Annual
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.45	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.41	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.61	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.38	USD	Annual
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.13	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.52	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.40	USD	Annual
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.40	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.68	USD	Annual
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.12	USD	1 Quarter
Continuing Operations - Diluted	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.43	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.21	USD	Annual
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.21	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	Annual
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	Annual
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued Operations - Diluted	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$2.59	USD	Annual
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.61	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$1.52	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$2.40	USD	Annual
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.43	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.61	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$1.41	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.12	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$2.68	USD	Annual
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.13	USD	1 Quarter
Earnings (Loss) per Common Share Diluted	`EarningsPerShareDiluted`	$0.45	USD	1 Quarter
Dividends per Common Share	`CommonStockDividendsPerShareCashPaid`	$1.72	USD	Annual
Dividends per Common Share	`CommonStockDividendsPerShareCashPaid`	$1.61	USD	Annual
Dividends per Common Share	`CommonStockDividendsPerShareCashPaid`	$1.66	USD	Annual
Average Common Shares Outstanding - Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	242.60M	shares	Annual
Average Common Shares Outstanding - Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	242.60M	shares	Annual
Average Common Shares Outstanding - Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	242.60M	shares	Annual
Average Common Shares Outstanding - Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	243.60M	shares	Annual
Average Common Shares Outstanding - Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	244.40M	shares	Annual
Average Common Shares Outstanding - Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	243.40M	shares	Annual

Cash Flow Statement 151 line items

Line Item	Tag	Value	Unit	Period
Interest Paid, Capitalized	`InterestPaidCapitalized`	$15.00M	USD	Annual
Interest Paid, Capitalized	`InterestPaidCapitalized`	$17.00M	USD	Annual
Interest Paid, Capitalized	`InterestPaidCapitalized`	$18.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$345.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$33.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$592.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$659.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$148.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$636.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$151.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$30.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$110.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$107.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$371.00M	USD	1 Quarter
(Income) Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$51.00M	USD	Annual
(Income) Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$-1.00M	USD	Annual
(Income) Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTax`	-	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	-	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	$69.00M	USD	Annual
Provision for Callaway construction and operating license	`AssetImpairmentCharges`	-	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$835.00M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$710.00M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$777.00M	USD	Annual
Amortization of nuclear fuel	`AdjustmentForAmortization`	$97.00M	USD	Annual
Amortization of nuclear fuel	`AdjustmentForAmortization`	$81.00M	USD	Annual
Amortization of nuclear fuel	`AdjustmentForAmortization`	$88.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$22.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$22.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$22.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$451.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$369.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$386.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$34.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$27.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$30.00M	USD	Annual
Share-based Compensation	`ShareBasedCompensation`	$17.00M	USD	Annual
Share-based Compensation	`ShareBasedCompensation`	$24.00M	USD	Annual
Share-based Compensation	`ShareBasedCompensation`	$25.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$24.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$10.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-4.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$-83.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$71.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$-31.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-11.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$14.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-3.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$19.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$10.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-2.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-44.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-22.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$13.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$281.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-215.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-94.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$-53.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$24.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$-30.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-44.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-14.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-10.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-16.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-9.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-10.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInDepositOtherAssets`	$-22.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInDepositOtherAssets`	$-3.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInDepositOtherAssets`	$7.00M	USD	Annual
Net cash provided by operating activities - continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$2.04B	USD	Annual
Net cash provided by operating activities - continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$2.12B	USD	Annual
Net cash provided by operating activities - continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$1.57B	USD	Annual
Net cash provided by operating activities - discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-1.00M	USD	Annual
Net cash provided by operating activities - discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-4.00M	USD	Annual
Net cash provided by operating activities - discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-6.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.12B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.56B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.03B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.92B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.78B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.08B	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$52.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$55.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$74.00M	USD	Annual
Purchases of securities - nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$392.00M	USD	Annual
Purchases of securities - nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$405.00M	USD	Annual
Purchases of securities - nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$363.00M	USD	Annual
Sales and maturities of securities - nuclear decommissioning trust fund	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$391.00M	USD	Annual
Sales and maturities of securities - nuclear decommissioning trust fund	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$377.00M	USD	Annual
Sales and maturities of securities - nuclear decommissioning trust fund	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$349.00M	USD	Annual
Proceeds from Collection of Notes Receivable	`ProceedsFromCollectionOfNotesReceivable`	$20.00M	USD	Annual
Proceeds from Collection of Notes Receivable	`ProceedsFromCollectionOfNotesReceivable`	-	USD	Annual
Proceeds from Collection of Notes Receivable	`ProceedsFromCollectionOfNotesReceivable`	$95.00M	USD	Annual
Contributions to Note Receivable	`ContributionstoNoteReceivable`	$89.00M	USD	Annual
Contributions to Note Receivable	`ContributionstoNoteReceivable`	$8.00M	USD	Annual
Contributions to Note Receivable	`ContributionstoNoteReceivable`	-	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-5.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-20.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-11.00M	USD	Annual
Net cash used in investing activities - continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-2.14B	USD	Annual
Net cash used in investing activities - continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-1.95B	USD	Annual
Net cash used in investing activities - continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-1.86B	USD	Annual
Net cash used in investing activities - discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$139.00M	USD	Annual
Net cash used in investing activities - discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-25.00M	USD	Annual
Net cash used in investing activities - discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.98B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.72B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.14B	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$416.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$402.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$390.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$257.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$346.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$-413.00M	USD	Annual
Maturities, redemptions, and repurchases of long-term debt	`RepaymentsOfOtherLongTermDebt`	$697.00M	USD	Annual
Maturities, redemptions, and repurchases of long-term debt	`RepaymentsOfOtherLongTermDebt`	$120.00M	USD	Annual
Maturities, redemptions, and repurchases of long-term debt	`RepaymentsOfOtherLongTermDebt`	$395.00M	USD	Annual
Issuances of Long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$898.00M	USD	Annual
Issuances of Long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$389.00M	USD	Annual
Issuances of Long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.20B	USD	Annual
Capital issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$11.00M	USD	Annual
Capital issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$9.00M	USD	Annual
Capital issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$12.00M	USD	Annual
Share-based payments	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$12.00M	USD	Annual
Share-based payments	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$14.00M	USD	Annual
Share-based payments	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$83.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$1.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-2.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-265.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$232.00M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$127.00M	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$287.00M	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-25.00M	USD	Annual
Net change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-283.00M	USD	Annual
Cash and cash equivalents at beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$30.00M	USD	Point-in-time
Cash and cash equivalents at beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$5.00M	USD	Point-in-time
Cash and cash equivalents at beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$9.00M	USD	Point-in-time
Cash and cash equivalents at beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$292.00M	USD	Point-in-time
Cash and cash equivalents at end of year	`CashAndCashEquivalentsAtCarryingValue`	$30.00M	USD	Point-in-time
Cash and cash equivalents at end of year	`CashAndCashEquivalentsAtCarryingValue`	$5.00M	USD	Point-in-time
Cash and cash equivalents at end of year	`CashAndCashEquivalentsAtCarryingValue`	$9.00M	USD	Point-in-time
Cash and cash equivalents at end of year	`CashAndCashEquivalentsAtCarryingValue`	$292.00M	USD	Point-in-time
Interest net of capitalized	`InterestPaidNet`	$335.00M	USD	Annual
Interest net of capitalized	`InterestPaidNet`	$333.00M	USD	Annual
Interest net of capitalized	`InterestPaidNet`	$358.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$-27.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$-15.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$-12.00M	USD	Annual

Stockholders Equity 39 line items

Line Item	Tag	Value	Unit	Period
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.25B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.86B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.09B	USD	Point-in-time
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$343.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$653.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$150.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$586.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$147.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$108.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$630.00M	USD	Annual
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$29.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$369.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$32.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLoss`	$105.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$345.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$33.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$592.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$659.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$148.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$636.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$151.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$30.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$110.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$107.00M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$371.00M	USD	1 Quarter
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$20.00M	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$12.00M	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-6.00M	USD	Annual
Beginning of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	242.60M	shares	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.25B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.86B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.09B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$7.10B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$6.95B	USD	Point-in-time

Comprehensive Income 24 line items

Line Item	Tag	Value	Unit	Period
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-7.00M	USD	Annual
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-7.00M	USD	Annual
Pension and other postretirement activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$3.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$585.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$593.00M	USD	Annual
Income from Continuing Operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$659.00M	USD	Annual
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$20.00M	USD	Annual
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$12.00M	USD	Annual
Pension and other postretirement activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-6.00M	USD	Annual
Comprehensive Income (Loss) from Continuing Operations	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$581.00M	USD	Annual
Comprehensive Income (Loss) from Continuing Operations	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$591.00M	USD	Annual
Comprehensive Income (Loss) from Continuing Operations	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$639.00M	USD	Annual
Less: Comprehensive Income from Continuing Operations Attributable to Noncontrolling Interests	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Comprehensive Income from Continuing Operations Attributable to Noncontrolling Interests	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Comprehensive Income from Continuing Operations Attributable to Noncontrolling Interests	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Comprehensive Income from Continuing Operations Attributable to Ameren Corporation	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxPortionAttributableToParent`	$575.00M	USD	Annual
Comprehensive Income from Continuing Operations Attributable to Ameren Corporation	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxPortionAttributableToParent`	$585.00M	USD	Annual
Comprehensive Income from Continuing Operations Attributable to Ameren Corporation	`ComprehensiveIncomeLossFromContinuingOperationsNetOfTaxPortionAttributableToParent`	$633.00M	USD	Annual
Comprehensive Income (Loss) from Discontinued Operations Attributable to Ameren Common shareholders	`ComprehensiveIncomeLossFromDiscontinuedOperationsNetOfTaxPortionAttributableToParent`	-	USD	Annual
Comprehensive Income (Loss) from Discontinued Operations Attributable to Ameren Common shareholders	`ComprehensiveIncomeLossFromDiscontinuedOperationsNetOfTaxPortionAttributableToParent`	$-1.00M	USD	Annual
Comprehensive Income (Loss) from Discontinued Operations Attributable to Ameren Common shareholders	`ComprehensiveIncomeLossFromDiscontinuedOperationsNetOfTaxPortionAttributableToParent`	$51.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$574.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$636.00M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTax`	$633.00M	USD	Annual

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