10-K Filing

AMEREN CORP CIK: 1002910 FY 2023

Filing Information

Form Type	10-K
Accession Number	`0001002910-24-000056`
Period End Date	20231231
Filing Date	20240229
Fiscal Year	2023
Fiscal Period	FY
XBRL Instance	aee-20231231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 88 Income Statement 75 Cash Flow Statement 124 Stockholders Equity 44

Balance Sheet 88 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$31.00M	USD	Point-in-time
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$30.00M	USD	Point-in-time
Common Stock, Par or Stated Value Per Share (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$10.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$25.00M	USD	Point-in-time
Common Stock, Par or Stated Value Per Share (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$600.00M	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
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$494.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$319.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	262.00M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$446.00M	USD	Point-in-time
Advances to money pool	`OtherReceivablesNetCurrent`	$106.00M	USD	Point-in-time
Advances to money pool	`OtherReceivablesNetCurrent`	$54.00M	USD	Point-in-time
Inventories	`InventoryNet`	$733.00M	USD	Point-in-time
Inventories	`InventoryNet`	$667.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$365.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$354.00M	USD	Point-in-time
Investments in Industrial Development Revenue Bonds	`InvestmentsInIndustrialDevelopmentRevenueBonds`	-	USD	Point-in-time
Current collateral assets	`CollateralAlreadyPostedAggregateFairValue`	$14.00M	USD	Point-in-time
Current collateral assets	`CollateralAlreadyPostedAggregateFairValue`	$142.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$155.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$125.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.67B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.18B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$31.26B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$33.78B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$958.00M	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.15B	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.43B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.81B	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$411.00M	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$581.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$768.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$921.00M	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$4.87B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$3.97B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$37.90B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$40.83B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$849.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$340.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$536.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.07B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$1.14B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$1.16B	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$176.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$115.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$682.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$648.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.37B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.35B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$13.69B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$15.12B	USD	Point-in-time
Accumulated deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$4.18B	USD	Point-in-time
Accumulated deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$3.80B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.31B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.51B	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$763.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$772.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$426.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$340.00M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$10.89B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$10.22B	USD	Point-in-time
Commitments and Contingencies (Notes 2, 9, and 14)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies (Notes 2, 9, and 14)	`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, principally premium on common stock	`AdditionalPaidInCapital`	$6.86B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$7.22B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$3.65B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$4.14B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-1.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.00M	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$11.35B	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$10.51B	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$129.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$129.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.64B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.48B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$37.90B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$40.83B	USD	Point-in-time

Income Statement 75 line items

Line Item	Tag	Value	Unit	Period
Pension and other postretirement benefit plan activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$4.00M	USD	Annual
Pension and other postretirement benefit plan activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-2.00M	USD	Annual
Pension and other postretirement benefit plan activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-4.00M	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$7.50B	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$6.39B	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$7.96B	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$581.00M	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$473.00M	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$514.00M	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$606.00M	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$1.55B	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$1.30B	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$657.00M	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$355.00M	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$442.00M	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.87B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.94B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.77B	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$1.39B	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$1.29B	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$1.15B	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$539.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$522.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$512.00M	USD	Annual
Total operating expenses	`OperatingExpenses`	$6.44B	USD	Annual
Total operating expenses	`OperatingExpenses`	$5.94B	USD	Annual
Total operating expenses	`OperatingExpenses`	$5.06B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.33B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.56B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.51B	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$202.00M	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$348.00M	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$226.00M	USD	Annual
Interest Charges	`InterestExpense`	$566.00M	USD	Annual
Interest Charges	`InterestExpense`	$383.00M	USD	Annual
Interest Charges	`InterestExpense`	$486.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.15B	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.25B	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.34B	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$157.00M	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$176.00M	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$183.00M	USD	Annual
Net Income	`ProfitLoss`	$1.08B	USD	Annual
Net Income	`ProfitLoss`	$995.00M	USD	Annual
Net Income	`ProfitLoss`	$1.16B	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.15B	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$990.00M	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.07B	USD	Annual
Pension and other postretirement benefit plan activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-14.00M	USD	Annual
Pension and other postretirement benefit plan activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$5.00M	USD	Annual
Pension and other postretirement benefit plan activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$14.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.06B	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.01B	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.15B	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$1.06B	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$1.15B	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$1.00B	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$3.86	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$4.16	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$4.39	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$4.14	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$4.38	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$3.84	USD	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	262.80M	shares	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	258.40M	shares	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	256.30M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	257.60M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	263.40M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	259.50M	shares	Annual

Cash Flow Statement 124 line items

Line Item	Tag	Value	Unit	Period
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$48.00M	USD	Annual
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$26.00M	USD	Annual
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$17.00M	USD	Annual
Proceeds from Income Tax Refunds	`ProceedsFromIncomeTaxRefunds`	-	USD	Annual
Proceeds from Income Tax Refunds	`ProceedsFromIncomeTaxRefunds`	-	USD	Annual
Net income	`ProfitLoss`	$1.08B	USD	Annual
Proceeds from Income Tax Refunds	`ProceedsFromIncomeTaxRefunds`	$49.00M	USD	Annual
Net income	`ProfitLoss`	$995.00M	USD	Annual
Net income	`ProfitLoss`	$1.16B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.22B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.43B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.37B	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$68.00M	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$65.00M	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$58.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$23.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$21.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$16.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$170.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$229.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$156.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$54.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$43.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$43.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$24.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$26.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$22.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-19.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-68.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-16.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$74.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$-144.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$317.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$71.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$77.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$67.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$136.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-104.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$28.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-4.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$1.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-13.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$72.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$165.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$439.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$109.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$74.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$71.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-75.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$115.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$52.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-283.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-65.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-33.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInCommodityContractAssetsAndLiabilities`	$64.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInCommodityContractAssetsAndLiabilities`	$54.00M	USD	Annual
Counterparty collateral, net	`IncreaseDecreaseInCommodityContractAssetsAndLiabilities`	$-147.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.26B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.66B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.56B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$3.35B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$3.60B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$3.48B	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$29.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$44.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$174.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$452.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$229.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$266.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$216.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$240.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$439.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-23.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-8.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$1.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.53B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.37B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.80B	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$565.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$610.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$662.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$5.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$5.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$5.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$55.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$522.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$-533.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$100.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$8.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$505.00M	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.47B	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.00B	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.29B	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$308.00M	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$346.00M	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$333.00M	USD	Annual
Redemptions of Ameren Illinois preferred stock	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	$13.00M	USD	Annual
Redemptions of Ameren Illinois preferred stock	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Redemptions of Ameren Illinois preferred stock	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$16.00M	USD	Annual
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$20.00M	USD	Annual
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$17.00M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$18.00M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$21.00M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$18.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-10.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-13.00M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.29B	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.72B	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.17B	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$61.00M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$56.00M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-146.00M	USD	Annual
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$216.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$155.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$301.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.00M	USD	Point-in-time
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$426.00M	USD	Annual
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$546.00M	USD	Annual
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$476.00M	USD	Annual
Income Taxes Paid, Net	`IncomeTaxesPaidNet`	$-24.00M	USD	Annual
Income Taxes Paid, Net	`IncomeTaxesPaidNet`	$-8.00M	USD	Annual
Income Taxes Paid, Net	`IncomeTaxesPaidNet`	$-1.00M	USD	Annual

Stockholders Equity 44 line items

Line Item	Tag	Value	Unit	Period
Common Stock	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.64B	USD	Point-in-time
Common Stock	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
Common Stock	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.48B	USD	Point-in-time
Net income	`ProfitLoss`	$1.08B	USD	Annual
Net income	`ProfitLoss`	$995.00M	USD	Annual
Net income	`ProfitLoss`	$1.16B	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.15B	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$990.00M	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.07B	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-14.00M	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$5.00M	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$14.00M	USD	Annual
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Beginning of year (shares)	`CommonStockSharesOutstanding`	262.00M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Shares issued under non-ATM program forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	1.60M	shares	Point-in-time
Shares issued under non-ATM program forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	0.00	shares	Annual
Shares issued under non-ATM program forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	0.00	shares	Annual
Shares issued under non-ATM program forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	1.60M	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	3.40M	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	3.20M	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	1.80M	shares	Annual
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	500,000.00	shares	Annual
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	500,000.00	shares	Annual
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	600,000.00	shares	Annual
Shares issued (in shares)	`StockIssuedDuringPeriodSharesOther`	500,000.00	shares	Annual
Shares issued (in shares)	`StockIssuedDuringPeriodSharesOther`	400,000.00	shares	Annual
Shares issued (in shares)	`StockIssuedDuringPeriodSharesOther`	500,000.00	shares	Annual
End of year (shares)	`CommonStockSharesOutstanding`	262.00M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$10.64B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.48B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$11.35B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$10.51B	USD	Point-in-time
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$2.36	USD	Annual
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$2.52	USD	Annual
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$2.20	USD	Annual

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