10-Q Filing

AMEREN CORP CIK: 1002910 Q1 2025

Filing Information

Form Type	10-Q
Accession Number	`0001002910-25-000098`
Period End Date	20250331
Filing Date	20250505
Fiscal Year	2025
Fiscal Period	Q1
XBRL Instance	aee-20250331_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 186 Income Statement 108 Cash Flow Statement 148 Stockholders Equity 60

Balance Sheet 186 line items

Line Item	Tag	Value	Unit	Period
Accounts Receivable, Allowance for Credit Loss, Current	`AllowanceForDoubtfulAccountsReceivableCurrent`	$41.00M	USD	Point-in-time
Accounts Receivable, Allowance for Credit Loss, Current	`AllowanceForDoubtfulAccountsReceivableCurrent`	$41.00M	USD	Point-in-time
Accounts Receivable, Allowance for Credit Loss, Current	`AllowanceForDoubtfulAccountsReceivableCurrent`	$30.00M	USD	Point-in-time
Accounts Receivable, Allowance for Credit Loss, Current	`AllowanceForDoubtfulAccountsReceivableCurrent`	$30.00M	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.40B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.40B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.57B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.57B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$317.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$317.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$17.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$17.00M	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$17.26B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$17.26B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$18.35B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$18.35B	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$23.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$23.00M	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	400.00M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$7.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$7.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$525.00M	USD	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$525.00M	USD	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$667.00M	USD	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$667.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$346.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$346.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$253.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$253.00M	USD	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$96.00M	USD	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$96.00M	USD	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$327.00M	USD	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$327.00M	USD	Point-in-time
Inventories	`InventoryNet`	$762.00M	USD	Point-in-time
Inventories	`InventoryNet`	$762.00M	USD	Point-in-time
Inventories	`InventoryNet`	$669.00M	USD	Point-in-time
Inventories	`InventoryNet`	$669.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$366.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$366.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$340.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$340.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$176.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$176.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$162.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$162.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.46B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.46B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.26B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$2.26B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$37.01B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$37.01B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$36.30B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$36.30B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.34B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.34B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.31B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.31B	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.40B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.40B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.57B	USD	Point-in-time
Regulatory Asset	`RegulatoryAssetsNoncurrent`	$2.57B	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$765.00M	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$765.00M	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$757.00M	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$757.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$1.14B	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$1.14B	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$1.12B	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$1.12B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$6.03B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$6.03B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$6.20B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$6.20B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$44.60B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$44.60B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$45.66B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$45.66B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$317.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$317.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$17.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$17.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.25B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.25B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.14B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$1.14B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$1.06B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$1.06B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$702.00M	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$702.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$159.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$159.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$196.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$196.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$223.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$223.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$223.00M	USD	Point-in-time
Customer deposits	`ContractWithCustomerLiabilityCurrent`	$223.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$475.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$475.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$510.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$510.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.41B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.41B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.86B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.86B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$17.26B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$17.26B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$18.35B	USD	Point-in-time
Long-term debt, net	`LongTermDebtNoncurrent`	$18.35B	USD	Point-in-time
Accumulated deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$4.47B	USD	Point-in-time
Accumulated deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$4.47B	USD	Point-in-time
Accumulated deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$4.78B	USD	Point-in-time
Accumulated deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$4.78B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.95B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.95B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.90B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.90B	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$822.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$822.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$830.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$830.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$487.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$487.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$535.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$535.00M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$12.10B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$12.10B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$11.68B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$11.68B	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common Stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common Stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common Stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Common Stock	`CommonStockValue`	$3.00M	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$7.51B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$7.51B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$7.52B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$7.52B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$4.70B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$4.70B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$4.60B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$4.60B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-10.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-10.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-6.00M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$12.22B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$12.22B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$12.11B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$12.11B	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$129.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$129.00M	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`	$11.57B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.57B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$44.60B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$44.60B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$45.66B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$45.66B	USD	Point-in-time

Income Statement 108 line items

Line Item	Tag	Value	Unit	Period
Pension and other postretirement benefit plan activity, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	-	USD	1 Quarter
Pension and other postretirement benefit plan activity, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	-	USD	1 Quarter
Pension and other postretirement benefit plan activity, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	-	USD	1 Quarter
Pension and other postretirement benefit plan activity, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	-	USD	1 Quarter
Unrealized net loss on derivative hedging instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Unrealized net loss on derivative hedging instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Unrealized net loss on derivative hedging instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Unrealized net loss on derivative hedging instruments, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax`	-	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$1.82B	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$1.82B	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$2.10B	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$2.10B	USD	1 Quarter
Fuel and purchased power	`UtilitiesOperatingExpenseFuelUsedAndPurchasedPower`	$328.00M	USD	1 Quarter
Fuel and purchased power	`UtilitiesOperatingExpenseFuelUsedAndPurchasedPower`	$328.00M	USD	1 Quarter
Fuel and purchased power	`UtilitiesOperatingExpenseFuelUsedAndPurchasedPower`	$502.00M	USD	1 Quarter
Fuel and purchased power	`UtilitiesOperatingExpenseFuelUsedAndPurchasedPower`	$502.00M	USD	1 Quarter
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$151.00M	USD	1 Quarter
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$151.00M	USD	1 Quarter
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$169.00M	USD	1 Quarter
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$169.00M	USD	1 Quarter
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$485.00M	USD	1 Quarter
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$485.00M	USD	1 Quarter
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$470.00M	USD	1 Quarter
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$470.00M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$367.00M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$367.00M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$361.00M	USD	1 Quarter
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$361.00M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$135.00M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$135.00M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$144.00M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$144.00M	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$1.45B	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$1.45B	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$1.67B	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$1.67B	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$430.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$430.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$371.00M	USD	1 Quarter
Operating Income	`OperatingIncomeLoss`	$371.00M	USD	1 Quarter
Other Income, Net	`OtherNonoperatingIncomeExpense`	$85.00M	USD	1 Quarter
Other Income, Net	`OtherNonoperatingIncomeExpense`	$85.00M	USD	1 Quarter
Other Income, Net	`OtherNonoperatingIncomeExpense`	$89.00M	USD	1 Quarter
Other Income, Net	`OtherNonoperatingIncomeExpense`	$89.00M	USD	1 Quarter
Interest Charges	`InterestExpense`	$175.00M	USD	1 Quarter
Interest Charges	`InterestExpense`	$175.00M	USD	1 Quarter
Interest Charges	`InterestExpense`	$154.00M	USD	1 Quarter
Interest Charges	`InterestExpense`	$154.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$306.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$306.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$340.00M	USD	1 Quarter
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$340.00M	USD	1 Quarter
Income Taxes	`IncomeTaxExpenseBenefit`	$44.00M	USD	1 Quarter
Income Taxes	`IncomeTaxExpenseBenefit`	$44.00M	USD	1 Quarter
Income Taxes	`IncomeTaxExpenseBenefit`	$50.00M	USD	1 Quarter
Income Taxes	`IncomeTaxExpenseBenefit`	$50.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$262.00M	USD	1 Quarter
Net Income	`ProfitLoss`	$262.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$1.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$1.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$1.00M	USD	1 Quarter
Preferred Stock Dividends	`PreferredStockDividendsIncomeStatementImpact`	$1.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$289.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$289.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$261.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$261.00M	USD	1 Quarter
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $ and $, respectively	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$1.00M	USD	1 Quarter
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $ and $, respectively	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$1.00M	USD	1 Quarter
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $ and $, respectively	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	-	USD	1 Quarter
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $ and $, respectively	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	-	USD	1 Quarter
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	-	USD	1 Quarter
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	1 Quarter
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax`	$-4.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$286.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$286.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$261.00M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$261.00M	USD	1 Quarter
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$260.00M	USD	1 Quarter
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$260.00M	USD	1 Quarter
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$285.00M	USD	1 Quarter
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$285.00M	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareBasic`	$1.07	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareBasic`	$1.07	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareBasic`	$0.98	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareBasic`	$0.98	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareDiluted`	$0.98	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareDiluted`	$0.98	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareDiluted`	$1.07	USD	1 Quarter
Earnings per Common Share - Basic and Diluted	`EarningsPerShareDiluted`	$1.07	USD	1 Quarter
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	266.40M	shares	1 Quarter
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	266.40M	shares	1 Quarter
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	270.00M	shares	1 Quarter
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	270.00M	shares	1 Quarter
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	266.80M	shares	1 Quarter
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	266.80M	shares	1 Quarter
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	271.40M	shares	1 Quarter
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	271.40M	shares	1 Quarter

Cash Flow Statement 148 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net income	`ProfitLoss`	$262.00M	USD	1 Quarter
Net income	`ProfitLoss`	$262.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$379.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$379.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$395.00M	USD	1 Quarter
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$395.00M	USD	1 Quarter
Amortization of nuclear fuel	`AmortizationOfNuclearFuelLease`	$20.00M	USD	1 Quarter
Amortization of nuclear fuel	`AmortizationOfNuclearFuelLease`	$20.00M	USD	1 Quarter
Amortization of nuclear fuel	`AmortizationOfNuclearFuelLease`	$18.00M	USD	1 Quarter
Amortization of nuclear fuel	`AmortizationOfNuclearFuelLease`	$18.00M	USD	1 Quarter
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$5.00M	USD	1 Quarter
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$5.00M	USD	1 Quarter
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$5.00M	USD	1 Quarter
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$5.00M	USD	1 Quarter
Deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$44.00M	USD	1 Quarter
Deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$44.00M	USD	1 Quarter
Deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$116.00M	USD	1 Quarter
Deferred income taxes and tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$116.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$16.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$16.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$9.00M	USD	1 Quarter
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$9.00M	USD	1 Quarter
Stock-based compensation costs	`ShareBasedCompensation`	$7.00M	USD	1 Quarter
Stock-based compensation costs	`ShareBasedCompensation`	$7.00M	USD	1 Quarter
Stock-based compensation costs	`ShareBasedCompensation`	$8.00M	USD	1 Quarter
Stock-based compensation costs	`ShareBasedCompensation`	$8.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-16.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-16.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-7.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-7.00M	USD	1 Quarter
Receivables	`IncreaseDecreaseInReceivables`	$-52.00M	USD	1 Quarter
Receivables	`IncreaseDecreaseInReceivables`	$-52.00M	USD	1 Quarter
Receivables	`IncreaseDecreaseInReceivables`	$68.00M	USD	1 Quarter
Receivables	`IncreaseDecreaseInReceivables`	$68.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-54.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-54.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-93.00M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-93.00M	USD	1 Quarter
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-284.00M	USD	1 Quarter
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-284.00M	USD	1 Quarter
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-291.00M	USD	1 Quarter
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-291.00M	USD	1 Quarter
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-8.00M	USD	1 Quarter
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-8.00M	USD	1 Quarter
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$70.00M	USD	1 Quarter
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$70.00M	USD	1 Quarter
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$70.00M	USD	1 Quarter
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$70.00M	USD	1 Quarter
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$95.00M	USD	1 Quarter
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$95.00M	USD	1 Quarter
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$-15.00M	USD	1 Quarter
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$-15.00M	USD	1 Quarter
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	-	USD	1 Quarter
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	-	USD	1 Quarter
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$13.00M	USD	1 Quarter
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$13.00M	USD	1 Quarter
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-10.00M	USD	1 Quarter
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-10.00M	USD	1 Quarter
Pension and other postretirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-56.00M	USD	1 Quarter
Pension and other postretirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-56.00M	USD	1 Quarter
Pension and other postretirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-39.00M	USD	1 Quarter
Pension and other postretirement benefits	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-39.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$492.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$492.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$431.00M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$431.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.06B	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$1.06B	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$890.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$890.00M	USD	1 Quarter
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$12.00M	USD	1 Quarter
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$12.00M	USD	1 Quarter
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$18.00M	USD	1 Quarter
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$18.00M	USD	1 Quarter
Purchases of securities nuclear decommissioning trust fund	`PaymentsToInvestInDecommissioningFund`	$107.00M	USD	1 Quarter
Purchases of securities nuclear decommissioning trust fund	`PaymentsToInvestInDecommissioningFund`	$107.00M	USD	1 Quarter
Purchases of securities nuclear decommissioning trust fund	`PaymentsToInvestInDecommissioningFund`	$70.00M	USD	1 Quarter
Purchases of securities nuclear decommissioning trust fund	`PaymentsToInvestInDecommissioningFund`	$70.00M	USD	1 Quarter
Sales and maturities of securities nuclear decommissioning trust fund	`ProceedsFromDecommissioningFund`	$66.00M	USD	1 Quarter
Sales and maturities of securities nuclear decommissioning trust fund	`ProceedsFromDecommissioningFund`	$66.00M	USD	1 Quarter
Sales and maturities of securities nuclear decommissioning trust fund	`ProceedsFromDecommissioningFund`	$93.00M	USD	1 Quarter
Sales and maturities of securities nuclear decommissioning trust fund	`ProceedsFromDecommissioningFund`	$93.00M	USD	1 Quarter
Other	`PaymentsForProceedsFromOtherInvestingActivities`	-	USD	1 Quarter
Other	`PaymentsForProceedsFromOtherInvestingActivities`	-	USD	1 Quarter
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-9.00M	USD	1 Quarter
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-9.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-906.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-906.00M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.09B	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.09B	USD	1 Quarter
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$178.00M	USD	1 Quarter
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$178.00M	USD	1 Quarter
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$191.00M	USD	1 Quarter
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$191.00M	USD	1 Quarter
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$1.00M	USD	1 Quarter
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$1.00M	USD	1 Quarter
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$1.00M	USD	1 Quarter
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$1.00M	USD	1 Quarter
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$332.00M	USD	1 Quarter
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$332.00M	USD	1 Quarter
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$108.00M	USD	1 Quarter
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$108.00M	USD	1 Quarter
Maturities of long-term debt	`RepaymentsOfLongTermDebt`	-	USD	1 Quarter
Maturities of long-term debt	`RepaymentsOfLongTermDebt`	-	USD	1 Quarter
Maturities of long-term debt	`RepaymentsOfLongTermDebt`	$300.00M	USD	1 Quarter
Maturities of long-term debt	`RepaymentsOfLongTermDebt`	$300.00M	USD	1 Quarter
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$347.00M	USD	1 Quarter
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$347.00M	USD	1 Quarter
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.10B	USD	1 Quarter
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.10B	USD	1 Quarter
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$10.00M	USD	1 Quarter
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$10.00M	USD	1 Quarter
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$13.00M	USD	1 Quarter
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$13.00M	USD	1 Quarter
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$8.00M	USD	1 Quarter
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$8.00M	USD	1 Quarter
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$13.00M	USD	1 Quarter
Employee payroll taxes related to stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$13.00M	USD	1 Quarter
Debt issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$5.00M	USD	1 Quarter
Debt issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$5.00M	USD	1 Quarter
Debt issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$11.00M	USD	1 Quarter
Debt issuance costs	`PaymentOfFinancingAndStockIssuanceCosts`	$11.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$497.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$497.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$704.00M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$704.00M	USD	1 Quarter
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$48.00M	USD	1 Quarter
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$48.00M	USD	1 Quarter
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$83.00M	USD	1 Quarter
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$83.00M	USD	1 Quarter
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$328.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$328.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$376.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$376.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$355.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$355.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$328.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$328.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$376.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$376.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$355.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$355.00M	USD	Point-in-time

Stockholders Equity 60 line items

Line Item	Tag	Value	Unit	Period
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.57B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.57B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
Net income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net income	`ProfitLoss`	$290.00M	USD	1 Quarter
Net income	`ProfitLoss`	$262.00M	USD	1 Quarter
Net income	`ProfitLoss`	$262.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$289.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$289.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$261.00M	USD	1 Quarter
Net income attributable to Ameren common shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$261.00M	USD	1 Quarter
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$1.00M	USD	1 Quarter
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$1.00M	USD	1 Quarter
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	-	USD	1 Quarter
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	-	USD	1 Quarter
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
Common stock shares outstanding at beginning of year	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	100,000.00	shares	1 Quarter
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	100,000.00	shares	1 Quarter
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	100,000.00	shares	1 Quarter
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	100,000.00	shares	1 Quarter
Shares issued for stock-based compensation	`StockIssuedDuringPeriodSharesOther`	200,000.00	shares	1 Quarter
Shares issued for stock-based compensation	`StockIssuedDuringPeriodSharesOther`	200,000.00	shares	1 Quarter
Shares issued for stock-based compensation	`StockIssuedDuringPeriodSharesOther`	300,000.00	shares	1 Quarter
Shares issued for stock-based compensation	`StockIssuedDuringPeriodSharesOther`	300,000.00	shares	1 Quarter
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	269.90M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	266.30M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	266.60M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
Common stock shares outstanding at end of period	`CommonStockSharesOutstanding`	270.30M	shares	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.57B	USD	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$11.57B	USD	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.24B	USD	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
End of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$12.35B	USD	Point-in-time
Shareholders' equity, end of year	`StockholdersEquity`	$12.22B	USD	Point-in-time
Shareholders' equity, end of year	`StockholdersEquity`	$12.22B	USD	Point-in-time
Shareholders' equity, end of year	`StockholdersEquity`	$12.11B	USD	Point-in-time
Shareholders' equity, end of year	`StockholdersEquity`	$12.11B	USD	Point-in-time
Dividends per common share	`CommonStockDividendsPerShareCashPaid`	$0.67	USD	1 Quarter
Dividends per common share	`CommonStockDividendsPerShareCashPaid`	$0.67	USD	1 Quarter
Dividends per common share	`CommonStockDividendsPerShareCashPaid`	$0.71	USD	1 Quarter
Dividends per common share	`CommonStockDividendsPerShareCashPaid`	$0.71	USD	1 Quarter

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