10-K Filing

AMEREN CORP CIK: 1002910 FY 2021

Filing Information

Form Type	10-K
Accession Number	`0001002910-22-000038`
Period End Date	20211231
Filing Date	20220223
Fiscal Year	2021
Fiscal Period	FY
XBRL Instance	aee-20211231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 87 Income Statement 75 Cash Flow Statement 131 Stockholders Equity 43

Balance Sheet 87 line items

Line Item	Tag	Value	Unit	Period
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$29.00M	USD	Point-in-time
Accounts receivable - trade, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$50.00M	USD	Point-in-time
Common Stock, Par or Stated Value Per Share (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	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`	$139.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$8.00M	USD	Point-in-time
Accounts receivable - trade (less allowance for doubtful accounts)	`AccountsReceivableNetCurrent`	$434.00M	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`	$415.00M	USD	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$301.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	246.20M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	244.50M	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
Unbilled revenue	`UnbilledReceivablesCurrent`	$269.00M	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$65.00M	USD	Point-in-time
Miscellaneous accounts receivable	`OtherReceivablesNetCurrent`	$85.00M	USD	Point-in-time
Inventories	`InventoryNet`	$521.00M	USD	Point-in-time
Inventories	`InventoryNet`	$592.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$109.00M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$319.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$229.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$135.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.65B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.97B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$26.81B	USD	Point-in-time
Property, Plant, and Equipment, Net	`PropertyPlantAndEquipmentNet`	$29.26B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$1.16B	USD	Point-in-time
Nuclear decommissioning trust fund	`DecommissioningFundInvestments`	$982.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Goodwill	`Goodwill`	$411.00M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.29B	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$1.10B	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$756.00M	USD	Point-in-time
Pension and other postretirement benefits	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$288.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$789.00M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$891.00M	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$3.57B	USD	Point-in-time
Total investments and other assets	`RegulatedEntityOtherAssetsNoncurrent`	$4.51B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$35.73B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$32.03B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$8.00M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$505.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$545.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$490.00M	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$1.09B	USD	Point-in-time
Accounts and wages payable	`AccountsPayableAndAccruedLiabilitiesCurrent`	$958.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$114.00M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$123.00M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$121.00M	USD	Point-in-time
Current regulatory liabilities	`RegulatoryLiabilityCurrent`	$113.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$489.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$445.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.18B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.83B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$12.56B	USD	Point-in-time
Long-term Debt, Net	`LongTermDebtNoncurrent`	$11.08B	USD	Point-in-time
Accumulated deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$3.21B	USD	Point-in-time
Accumulated deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent`	$3.50B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.85B	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$5.28B	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$696.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$757.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$414.00M	USD	Point-in-time
Other deferred credits and liabilities	`OtherLiabilitiesNoncurrent`	$503.00M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$10.52B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$9.69B	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`	$6.50B	USD	Point-in-time
Other paid-in capital, principally premium on common stock	`AdditionalPaidInCapital`	$6.18B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$2.76B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$3.18B	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$13.00M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-1.00M	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$8.94B	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$9.70B	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$129.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$142.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.20B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.08B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$32.03B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$35.73B	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`	$1.00M	USD	Annual
Pension and other postretirement benefit plan activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$5.00M	USD	Annual
Pension and other postretirement benefit plan activity, tax (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$4.00M	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$5.79B	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$5.91B	USD	Annual
Operating revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$6.39B	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$490.00M	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$535.00M	USD	Annual
Fuel	`UtilitiesOperatingExpenseFuelUsed`	$581.00M	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$513.00M	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$556.00M	USD	Annual
Purchased power	`UtilitiesOperatingExpensePurchasedPower`	$606.00M	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$272.00M	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$331.00M	USD	Annual
Natural gas purchased for resale	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$442.00M	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.75B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.77B	USD	Annual
Other operations and maintenance	`UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses`	$1.66B	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$995.00M	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$1.15B	USD	Annual
Depreciation and amortization	`UtilitiesOperatingExpenseDepreciationAndAmortization`	$1.07B	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$481.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$483.00M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$512.00M	USD	Annual
Total operating expenses	`OperatingExpenses`	$4.64B	USD	Annual
Total operating expenses	`OperatingExpenses`	$4.49B	USD	Annual
Total operating expenses	`OperatingExpenses`	$5.06B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.33B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.27B	USD	Annual
Operating Income	`OperatingIncomeLoss`	$1.30B	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$130.00M	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$151.00M	USD	Annual
Other Income, Net	`OtherNonoperatingIncomeExpense`	$202.00M	USD	Annual
Interest Charges	`InterestExpense`	$381.00M	USD	Annual
Interest Charges	`InterestExpense`	$419.00M	USD	Annual
Interest Charges	`InterestExpense`	$383.00M	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$1.03B	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$1.15B	USD	Annual
Income Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$1.02B	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$155.00M	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$157.00M	USD	Annual
Income Taxes	`IncomeTaxExpenseBenefit`	$182.00M	USD	Annual
Net Income	`ProfitLoss`	$834.00M	USD	Annual
Net Income	`ProfitLoss`	$877.00M	USD	Annual
Net Income	`ProfitLoss`	$995.00M	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$871.00M	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$828.00M	USD	Annual
Net Income Attributable to Ameren Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$990.00M	USD	Annual
Pension and other postretirement benefit plan activity, net of income taxes (benefit)	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-16.00M	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`	$1.01B	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$893.00M	USD	Annual
Comprehensive Income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$839.00M	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$5.00M	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Comprehensive Income Attributable to Noncontrolling Interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$1.00B	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$833.00M	USD	Annual
Comprehensive Income Attributable to Ameren Common Shareholders	`ComprehensiveIncomeNetOfTax`	$887.00M	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$3.37	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$3.86	USD	Annual
Earnings per Common Share Basic	`EarningsPerShareBasic`	$3.53	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$3.35	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$3.50	USD	Annual
Earnings per Common Share Diluted	`EarningsPerShareDiluted`	$3.84	USD	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	245.60M	shares	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	247.00M	shares	Annual
Weighted-average Common Shares Outstanding Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	256.30M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	247.10M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	248.70M	shares	Annual
Weighted-average Common Shares Outstanding Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	257.60M	shares	Annual

Cash Flow Statement 131 line items

Line Item	Tag	Value	Unit	Period
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$17.00M	USD	Annual
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$16.00M	USD	Annual
Interest Paid, Capitalized, Investing Activities	`InterestPaidCapitalized`	$20.00M	USD	Annual
Net income	`ProfitLoss`	$834.00M	USD	Annual
Net income	`ProfitLoss`	$877.00M	USD	Annual
Net income	`ProfitLoss`	$995.00M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.22B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.00B	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$1.08B	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$58.00M	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$79.00M	USD	Annual
Amortization of nuclear fuel	`OtherAmortizationOfDeferredCharges`	$68.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$23.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$19.00M	USD	Annual
Amortization of debt issuance costs and premium/discounts	`AmortizationOfFinancingCostsAndDiscounts`	$22.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$148.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$156.00M	USD	Annual
Deferred income taxes and investment tax credits, net	`DeferredIncomeTaxesAndTaxCredits`	$167.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$28.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$32.00M	USD	Annual
Allowance for equity funds used during construction	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$43.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$20.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$21.00M	USD	Annual
Stock-based compensation costs	`ShareBasedCompensation`	$22.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-19.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-22.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$14.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$47.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$-79.00M	USD	Annual
Receivables	`IncreaseDecreaseInReceivables`	$74.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$10.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$71.00M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$25.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$28.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-3.00M	USD	Annual
Accounts and wages payable	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$40.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$-8.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$1.00M	USD	Annual
Taxes accrued	`IncreaseDecreaseInAccruedTaxesPayable`	$34.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-164.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$439.00M	USD	Annual
Regulatory assets and liabilities	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$254.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$59.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$126.00M	USD	Annual
Assets, other	`IncreaseDecreaseInOtherOperatingAssets`	$83.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-33.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-111.00M	USD	Annual
Liabilities, other	`IncreaseDecreaseInOtherOperatingLiabilities`	$-74.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-38.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-33.00M	USD	Annual
Pension and other postretirement benefits	`IncreaseDecreaseInEmployeeRelatedLiabilities`	$-39.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.66B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$1.73B	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$2.17B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.41B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.95B	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.67B	USD	Annual
Wind generation expenditures	`PaymentsToAcquireProjects`	-	USD	Annual
Wind generation expenditures	`PaymentsToAcquireProjects`	$525.00M	USD	Annual
Wind generation expenditures	`PaymentsToAcquireProjects`	$564.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$44.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$31.00M	USD	Annual
Nuclear fuel expenditures	`PaymentsForNuclearFuel`	$66.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$452.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$256.00M	USD	Annual
Purchases of securities nuclear decommissioning trust fund	`PaymentsToAcquireOtherInvestments`	$224.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$183.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$260.00M	USD	Annual
Proceeds from sales and maturities	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$439.00M	USD	Annual
Purchase of bonds	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$207.00M	USD	Annual
Purchase of bonds	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	-	USD	Annual
Purchase of bonds	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	-	USD	Annual
Proceeds from sale of remarketed bonds	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	-	USD	Annual
Proceeds from sale of remarketed bonds	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	$207.00M	USD	Annual
Proceeds from sale of remarketed bonds	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	-	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-8.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-11.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-3.00M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.53B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-3.33B	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.44B	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$494.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$472.00M	USD	Annual
Dividends on common stock	`PaymentsOfDividendsCommonStock`	$565.00M	USD	Annual
Dividends paid to noncontrolling interest holders	`PaymentsOfDividendsMinorityInterest`	$5.00M	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`	$55.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$50.00M	USD	Annual
Short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$-157.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$8.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$442.00M	USD	Annual
Maturities of long-term debt	`RepaymentsOfOtherLongTermDebt`	$580.00M	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$1.53B	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.18B	USD	Annual
Issuances of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$2.00B	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$476.00M	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$308.00M	USD	Annual
Issuances of common stock	`ProceedsFromIssuanceOfCommonStock`	$68.00M	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`	$29.00M	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`	$17.00M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$20.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-13.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	-	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.73B	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$334.00M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$1.72B	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$125.00M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-146.00M	USD	Annual
Net change in cash, cash equivalents, and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$69.00M	USD	Annual
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$176.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$107.00M	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 end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$176.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$107.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$155.00M	USD	Point-in-time
Cash, cash equivalents, and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$301.00M	USD	Point-in-time
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$426.00M	USD	Annual
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$367.00M	USD	Annual
Interest (net of amounts capitalized, respectively)	`InterestPaidNet`	$383.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$13.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$13.00M	USD	Annual
Income taxes, net	`IncomeTaxesPaidNet`	$-1.00M	USD	Annual

Stockholders Equity 43 line items

Line Item	Tag	Value	Unit	Period
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.20B	USD	Point-in-time
Beginning of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.08B	USD	Point-in-time
Net income	`ProfitLoss`	$834.00M	USD	Annual
Net income	`ProfitLoss`	$877.00M	USD	Annual
Net income	`ProfitLoss`	$995.00M	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$871.00M	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$828.00M	USD	Annual
Net Income (Loss) Available to Common Stockholders, Basic	`NetIncomeLossAvailableToCommonStockholdersBasic`	$990.00M	USD	Annual
Change in deferred retirement benefit costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-16.00M	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`	$6.00M	USD	Annual
Net income attributable to noncontrolling interest holders	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Beginning of year (shares)	`CommonStockSharesOutstanding`	246.20M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	244.50M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
Beginning of year (shares)	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
Shares issued under forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	5.90M	shares	Annual
Shares issued under forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	0.00	shares	Annual
Shares issued under forward sale agreement	`CommonStockSharesIssuedThroughForwardSaleAgreement`	1.60M	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	0.00	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	0.00	shares	Annual
Stock Issued During Period, Shares, New Issues	`StockIssuedDuringPeriodSharesNewIssues`	1.80M	shares	Annual
Shares issued under the DRPlus and 401(k) plan	`StockIssuedDuringPeriodSharesDividendReinvestmentPlan`	700,000.00	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`	900,000.00	shares	Annual
Stock Issued During Period, Shares, Other	`StockIssuedDuringPeriodSharesOther`	800,000.00	shares	Annual
Stock Issued During Period, Shares, Other	`StockIssuedDuringPeriodSharesOther`	500,000.00	shares	Annual
Stock Issued During Period, Shares, Other	`StockIssuedDuringPeriodSharesOther`	500,000.00	shares	Annual
End of year (shares)	`CommonStockSharesOutstanding`	246.20M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	244.50M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	257.70M	shares	Point-in-time
End of year (shares)	`CommonStockSharesOutstanding`	253.30M	shares	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.83B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$8.20B	USD	Point-in-time
End of year	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$9.08B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$8.94B	USD	Point-in-time
Stockholders' equity, end of year	`StockholdersEquity`	$9.70B	USD	Point-in-time
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$2.20	USD	Annual
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$1.92	USD	Annual
Common Stock, Dividends, Per Share, Cash Paid	`CommonStockDividendsPerShareCashPaid`	$2.00	USD	Annual

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