$ALE
ALLETE INC Stock $ale

$ale Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-Q Financial Statement

#000006675623000029 Filed on May 03, 2023

Income Statement

Concept	2023 Q1
Revenue	$564.9M
YoY Change	47.3%
Cost Of Revenue	$210.5M
YoY Change	1138.24%
Gross Profit	$354.4M
YoY Change	-3.3%
Gross Profit Margin	62.74%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$62.30M
YoY Change	0.97%
% of Gross Profit	17.58%
Operating Expenses	$306.1M
YoY Change	-2.24%
Operating Profit	$48.30M
YoY Change	-9.55%
Interest Expense	$19.30M
YoY Change	5.46%
% of Operating Profit	39.96%
Other Income/Expense, Net	-$9.200M
YoY Change	-14.81%
Pretax Income	$39.10M
YoY Change	-8.22%
Income Tax	$1.500M
% Of Pretax Income	3.84%
Net Earnings	$58.20M
YoY Change	-12.22%
Net Earnings / Revenue	10.3%
Basic Earnings Per Share	$1.02
Diluted Earnings Per Share	$1.02
COMMON SHARES
Basic Shares Outstanding	57.25M shares
Diluted Shares Outstanding	57.30M shares

Balance Sheet

Concept	2023 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$29.90M
YoY Change	-50.25%
Cash & Equivalents	$29.90M
Short-Term Investments
Other Short-Term Assets	$72.60M
YoY Change	-31.12%
Inventory	$346.9M
Prepaid Expenses
Receivables	$120.3M
Other Receivables	$0.00
Total Short-Term Assets	$569.7M
YoY Change	18.56%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.979B
YoY Change	-1.95%
Goodwill	$154.9M
YoY Change
Intangibles
YoY Change
Long-Term Investments	$323.9M
YoY Change	1.03%
Other Assets	$207.0M
YoY Change	-2.54%
Total Long-Term Assets	$6.135B
YoY Change	0.98%
TOTAL ASSETS
Total Short-Term Assets	$569.7M
Total Long-Term Assets	$6.135B
Total Assets	$6.705B
YoY Change	2.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$84.90M
YoY Change	11.86%
Accrued Expenses	$17.90M
YoY Change	-9.14%
Deferred Revenue	$10.30M
YoY Change	-64.36%
Short-Term Debt	$0.00
YoY Change
Long-Term Debt Due	$176.4M
YoY Change	-36.57%
Total Short-Term Liabilities	$464.4M
YoY Change	-16.56%
LONG-TERM LIABILITIES
Long-Term Debt	$1.756B
YoY Change	5.16%
Other Long-Term Liabilities	$270.4M
YoY Change	-5.98%
Total Long-Term Liabilities	$2.026B
YoY Change	3.52%
TOTAL LIABILITIES
Total Short-Term Liabilities	$464.4M
Total Long-Term Liabilities	$2.026B
Total Liabilities	$3.347B
YoY Change	-1.93%
SHAREHOLDERS EQUITY
Retained Earnings	$954.2M
YoY Change	2.38%
Common Stock	$1.786B
YoY Change	15.85%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.716B
YoY Change
Total Liabilities & Shareholders Equity	$6.705B
YoY Change	2.27%

Cashflow Statement

Concept	2023 Q1
OPERATING ACTIVITIES
Net Income	$58.20M
YoY Change	-12.22%
Depreciation, Depletion And Amortization	$62.30M
YoY Change	0.97%
Cash From Operating Activities	$92.40M
YoY Change	-2025.0%
INVESTING ACTIVITIES
Capital Expenditures	$70.00M
YoY Change	22.16%
Acquisitions
YoY Change
Other Investing Activities	$3.900M
YoY Change	1850.0%
Cash From Investing Activities	-$74.70M
YoY Change	24.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$227.8M
YoY Change	-12.11%
Cash From Financing Activities	-$18.30M
YoY Change	-119.85%
NET CHANGE
Cash From Operating Activities	$92.40M
Cash From Investing Activities	-$74.70M
Cash From Financing Activities	-$18.30M
Net Change In Cash	-$600.0K
YoY Change	-102.2%
FREE CASH FLOW
Cash From Operating Activities	$92.40M
Capital Expenditures	$70.00M
Free Cash Flow	$22.40M
YoY Change	-136.07%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000066756
CY2023Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	57316155	shares
CY2023Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2023Q1	dei	Amendment Flag AmendmentFlag	false
CY2023Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1700000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1600000	usd
CY2023Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2023Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	80000000.0	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	80000000.0	shares
CY2023Q1	dei	City Area Code CityAreaCode	218
CY2023Q1	dei	Local Phone Number LocalPhoneNumber	279-5000
CY2023Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	57300000	shares
CY2023Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Duluth
CY2023Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	MN
CY2023Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	55802-2093
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	57200000	shares
CY2023Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	57300000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	57200000	shares
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	100000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	0	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-100000	usd
CY2023Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segments
CY2023Q1	dei	Document Type DocumentType	10-Q
CY2023Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2023Q1	dei	Document Period End Date DocumentPeriodEndDate	2023-03-31
CY2023Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2023Q1	dei	Entity File Number EntityFileNumber	1-3548
CY2023Q1	dei	Entity Registrant Name EntityRegistrantName	ALLETE, Inc.
CY2023Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MN
CY2023Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	41-0418150
CY2023Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	30 West Superior Street
CY2023Q1	dei	Security12b Title Security12bTitle	Common Stock, without par value
CY2023Q1	dei	Trading Symbol TradingSymbol	ALE
CY2023Q1	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2023Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023Q1	dei	Entity Shell Company EntityShellCompany	false
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	57316155	shares
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29900000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	36400000	usd
CY2023Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	120300000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	137900000	usd
CY2023Q1	us-gaap	Inventory Net InventoryNet	346900000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	455900000	usd
CY2023Q1	us-gaap	Other Assets Current OtherAssetsCurrent	72600000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	87800000	usd
CY2023Q1	us-gaap	Assets Current AssetsCurrent	569700000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	718000000.0	usd
CY2023Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4979300000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5004000000	usd
CY2023Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	469100000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	441000000.0	usd
CY2023Q1	us-gaap	Equity Method Investments EquityMethodInvestments	323900000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	322700000	usd
CY2023Q1	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	155500000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	155600000	usd
CY2023Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	207000000.0	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	204300000	usd
CY2023Q1	us-gaap	Assets Assets	6704500000	usd
CY2022Q4	us-gaap	Assets Assets	6845600000	usd
CY2023Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	84900000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	103000000.0	usd
CY2023Q1	us-gaap	Taxes Payable Current TaxesPayableCurrent	81400000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	69100000	usd
CY2023Q1	us-gaap	Interest Payable Current InterestPayableCurrent	14900000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	20500000	usd
CY2023Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	176400000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	272600000	usd
CY2023Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	106800000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	251000000.0	usd
CY2023Q1	us-gaap	Liabilities Current LiabilitiesCurrent	464400000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	716200000	usd
CY2023Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1755500000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1648200000	usd
CY2023Q1	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	156300000	usd
CY2022Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	158100000	usd
CY2023Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	526400000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	526100000	usd
CY2023Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	173800000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	179700000	usd
CY2023Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	270400000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	269000000.0	usd
CY2023Q1	us-gaap	Liabilities Liabilities	3346800000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	3497300000	usd
CY2023Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q1	us-gaap	Common Stock Value CommonStockValue	1785600000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	1781500000	usd
CY2023Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24300000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24400000	usd
CY2023Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	954200000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	934800000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	2715500000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2691900000	usd
CY2023Q1	us-gaap	Minority Interest MinorityInterest	642200000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	656400000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3357700000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3348300000	usd
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CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6845600000	usd
CY2023Q1	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	312600000	usd
CY2022Q1	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	329000000.0	usd
CY2023Q1	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	251000000.0	usd
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CY2022Q1	ale	Amortizationof Power Purchase Agreements AmortizationofPowerPurchaseAgreements	2800000	usd
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CY2022Q1	us-gaap	Revenues Revenues	383500000	usd
CY2023Q1	ale	Fuel Purchased Powerand Gas Utility FuelPurchasedPowerandGasUtility	118600000	usd
CY2022Q1	ale	Fuel Purchased Powerand Gas Utility FuelPurchasedPowerandGasUtility	137400000	usd
CY2023Q1	ale	Transmission Services Utility TransmissionServicesUtility	20100000	usd
CY2022Q1	ale	Transmission Services Utility TransmissionServicesUtility	19900000	usd
CY2023Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	210500000	usd
CY2022Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	17000000.0	usd
CY2023Q1	ale	Operatingand Maintenance OperatingandMaintenance	85700000	usd
CY2022Q1	ale	Operatingand Maintenance OperatingandMaintenance	75300000	usd
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CY2023Q1	us-gaap	Interest Expense InterestExpense	19300000	usd
CY2022Q1	us-gaap	Interest Expense InterestExpense	18300000	usd
CY2023Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6000000.0	usd
CY2022Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5500000	usd
CY2023Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4100000	usd
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CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	57300000	shares
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CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
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CY2023Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6300000	usd
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CY2023Q1	us-gaap	Share Based Compensation ShareBasedCompensation	800000	usd
CY2022Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1300000	usd
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CY2022Q1	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	-400000	usd
CY2023Q1	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	15300000	usd
CY2022Q1	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-1900000	usd
CY2023Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	300000	usd
CY2022Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	400000	usd
CY2023Q1	ale	Provision Payment For Interim Rate Refund ProvisionPaymentForInterimRateRefund	5100000	usd
CY2022Q1	ale	Provision Payment For Interim Rate Refund ProvisionPaymentForInterimRateRefund	0	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-17300000	usd
CY2022Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-4900000	usd
CY2023Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-109000000.0	usd
CY2022Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	98900000	usd
CY2023Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-11000000.0	usd
CY2022Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7400000	usd
CY2023Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-10700000	usd
CY2022Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-10600000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-142200000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-1000000.0	usd
CY2023Q1	us-gaap	Pension Contributions PensionContributions	6500000	usd
CY2022Q1	us-gaap	Pension Contributions PensionContributions	0	usd
CY2023Q1	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	700000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-3900000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	400000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	1800000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	92400000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-4800000	usd
CY2023Q1	ale	Cash Proceeds From Sale Of Available For Sale Securities CashProceedsFromSaleOfAvailableForSaleSecurities	0	usd
CY2022Q1	ale	Cash Proceeds From Sale Of Available For Sale Securities CashProceedsFromSaleOfAvailableForSaleSecurities	500000	usd
CY2023Q1	ale	Payments For Purchase Of Available For Sale Securities PaymentsForPurchaseOfAvailableForSaleSecurities	0	usd
CY2022Q1	ale	Payments For Purchase Of Available For Sale Securities PaymentsForPurchaseOfAvailableForSaleSecurities	400000	usd
CY2023Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	800000	usd
CY2022Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2700000	usd
CY2023Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	70000000.0	usd
CY2022Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	57700000	usd
CY2023Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3900000	usd
CY2022Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-200000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-74700000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-60100000	usd
CY2023Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3300000	usd
CY2022Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3300000	usd
CY2023Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	238500000	usd
CY2022Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	228900000	usd
CY2023Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	227800000	usd
CY2022Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	259200000	usd
CY2023Q1	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	6700000	usd
CY2022Q1	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	154100000	usd
CY2023Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	38800000	usd
CY2022Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34500000	usd
CY2023Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-200000	usd
CY2022Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-400000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-18300000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	92200000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-600000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	27300000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40200000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47700000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39600000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	75000000.0	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3357700000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3143500000	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.6775
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.65
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29900000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	36400000	usd
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	60100000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45100000	usd
CY2023Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	7400000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1500000	usd
CY2022Q1	us-gaap	Restricted Cash Current RestrictedCashCurrent	7100000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	300000	usd
CY2023Q1	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2300000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2300000	usd
CY2022Q1	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	7800000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2300000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39600000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40200000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	75000000.0	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47700000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	204300000	usd
CY2023Q1	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	39600000	usd
CY2022Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	33400000	usd
CY2023Q1	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	119200000	usd
CY2022Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	75100000	usd
CY2023Q1	us-gaap	Other Inventory OtherInventory	188100000	usd
CY2022Q4	us-gaap	Other Inventory OtherInventory	347400000	usd
CY2023Q1	us-gaap	Inventory Net InventoryNet	346900000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	455900000	usd
CY2023Q1	us-gaap	Goodwill Goodwill	154900000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	154900000	usd
CY2023Q1	us-gaap	Goodwill Change In Goodwill Allocation Description GoodwillChangeInGoodwillAllocationDescription	There have been no changes to goodwill by reportable segment
CY2023Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	106800000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	251000000.0	usd
CY2023Q1	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	20300000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	21000000.0	usd
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11800000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12700000	usd
CY2023Q1	us-gaap	Real Estate Investments RealEstateInvestments	19500000	usd
CY2022Q4	us-gaap	Real Estate Investments RealEstateInvestments	19100000	usd
CY2023Q1	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2300000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2300000	usd
CY2023Q1	ale	Other Postretirement Benefit Plans OtherPostretirementBenefitPlans	59600000	usd
CY2022Q4	ale	Other Postretirement Benefit Plans OtherPostretirementBenefitPlans	58800000	usd
CY2023Q1	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	93500000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	90400000	usd
CY2023Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	207000000.0	usd
CY2023Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	10300000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	150700000	usd
CY2023Q1	ale	Power Purchase Agreement Current Liability PowerPurchaseAgreementCurrentLiability	6100000	usd
CY2022Q4	ale	Power Purchase Agreement Current Liability PowerPurchaseAgreementCurrentLiability	6100000	usd
CY2023Q1	ale	Public Utilities Reserve For Interim Rates PublicUtilitiesReserveForInterimRates	23500000	usd
CY2022Q4	ale	Public Utilities Reserve For Interim Rates PublicUtilitiesReserveForInterimRates	18400000	usd
CY2023Q1	ale	Manufactured Gas Plant Current ManufacturedGasPlantCurrent	14500000	usd
CY2022Q4	ale	Manufactured Gas Plant Current ManufacturedGasPlantCurrent	14700000	usd
CY2023Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3000000.0	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3200000	usd
CY2023Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	49400000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	57900000	usd
CY2023Q1	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	204400000	usd
CY2022Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	200400000	usd
CY2023Q1	ale	Power Purchase Agreement Noncurrent Liability PowerPurchaseAgreementNoncurrentLiability	25400000	usd
CY2022Q4	ale	Power Purchase Agreement Noncurrent Liability PowerPurchaseAgreementNoncurrentLiability	26900000	usd
CY2023Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8800000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9300000	usd
CY2023Q1	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	31800000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	32400000	usd
CY2023Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	270400000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	269000000.0	usd
CY2023Q1	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	500000	usd
CY2022Q1	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	900000	usd
CY2023Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4100000	usd
CY2022Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2000000.0	usd
CY2023Q1	us-gaap	Interest Paid Net InterestPaidNet	24600000	usd
CY2022Q1	us-gaap	Interest Paid Net InterestPaidNet	22400000	usd
CY2023Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	usd
CY2022Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	300000	usd
CY2023Q1	ale	Increase Decreasein Accounts Payablefor Capital Additionsto Property Plantand Equipment IncreaseDecreaseinAccountsPayableforCapitalAdditionstoPropertyPlantandEquipment	7100000	usd
CY2022Q1	ale	Increase Decreasein Accounts Payablefor Capital Additionsto Property Plantand Equipment IncreaseDecreaseinAccountsPayableforCapitalAdditionstoPropertyPlantandEquipment	24500000	usd
CY2023Q1	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	2400000	usd
CY2022Q1	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	3000000.0	usd
CY2023Q1	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	15300000	usd
CY2022Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	25600000	usd
CY2023Q1	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	469100000	usd
CY2022Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	441000000.0	usd
CY2023Q1	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	30300000	usd
CY2022Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	23400000	usd
CY2023Q1	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	526400000	usd
CY2022Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	526100000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1200000	usd
CY2023Q1	ale	Availableforsale Securities Debt Maturities After One Year Through Three Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue	2400000	usd
CY2023Q1	ale	Availableforsale Securities Debt Maturities After Three Years Through Five Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue	1700000	usd
CY2023Q1	ale	Availableforsale Securities Debt Maturities After Five Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	400000	usd
CY2023Q1	us-gaap	Long Term Debt LongTermDebt	1939900000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1929100000	usd
CY2023Q1	ale	Debt Current Gross DebtCurrentGross	176500000	usd
CY2023Q1	ale	Unamortized Debt Issuance Expense Debt Current UnamortizedDebtIssuanceExpenseDebtCurrent	100000	usd
CY2023Q1	us-gaap	Debt Current DebtCurrent	176400000	usd
CY2023Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1763400000	usd
CY2023Q1	ale	Unamortized Debt Issuance Expense Long Term Debt Excluding Current Maturities UnamortizedDebtIssuanceExpenseLongTermDebtExcludingCurrentMaturities	7900000	usd
CY2023Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1755500000	usd
CY2023Q1	ale	Debt Long Termand Short Term Combined Amount Gross DebtLongTermandShortTermCombinedAmountGross	1939900000	usd
CY2023Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8000000.0	usd
CY2023Q1	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	1931900000	usd
CY2022Q4	ale	Debt Current Gross DebtCurrentGross	272700000	usd
CY2022Q4	ale	Unamortized Debt Issuance Expense Debt Current UnamortizedDebtIssuanceExpenseDebtCurrent	100000	usd
CY2022Q4	us-gaap	Debt Current DebtCurrent	272600000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1656400000	usd
CY2022Q4	ale	Unamortized Debt Issuance Expense Long Term Debt Excluding Current Maturities UnamortizedDebtIssuanceExpenseLongTermDebtExcludingCurrentMaturities	8200000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1648200000	usd
CY2022Q4	ale	Debt Long Termand Short Term Combined Amount Gross DebtLongTermandShortTermCombinedAmountGross	1929100000	usd
CY2022Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	8300000	usd
CY2022Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	1920800000	usd
CY2023Q1	ale	Debt Instrument Actual Indebtedness To Total Capital Ratio DebtInstrumentActualIndebtednessToTotalCapitalRatio	0.38
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	58200000	usd
CY2023Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	58200000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	66300000	usd
CY2022Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	66300000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	57300000	shares
CY2023Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	57300000	shares
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	53300000	shares
CY2022Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53300000	shares
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.24
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2023Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5600000	usd
CY2022Q1	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	usd
CY2023Q1	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2200000	usd
CY2022Q1	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	100000	usd
CY2023Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7800000	usd
CY2022Q1	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	100000	usd
CY2023Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8300000	usd
CY2022Q1	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8600000	usd
CY2023Q1	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2100000	usd
CY2022Q1	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4800000	usd
CY2023Q1	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-100000	usd
CY2022Q1	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-200000	usd
CY2023Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6300000	usd
CY2022Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4000000.0	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1500000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3900000	usd
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39100000	usd
CY2022Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42600000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8200000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8900000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3400000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3900000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	10400000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	17600000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	2200000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	0	usd
CY2023Q1	ale	Effective Income Tax Rate Reconciliation Regulatory Differences EffectiveIncomeTaxRateReconciliationRegulatoryDifferences	-2800000	usd
CY2022Q1	ale	Effective Income Tax Rate Reconciliation Regulatory Differences EffectiveIncomeTaxRateReconciliationRegulatoryDifferences	-3800000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	-3800000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	-3800000	usd
CY2023Q1	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1500000	usd
CY2022Q1	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	900000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1500000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3900000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.038
CY2022Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.092
CY2023Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1100000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1300000	usd
CY2023Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	600000	usd
CY2023Q1	us-gaap	Revenues Revenues	564900000	usd
CY2022Q1	us-gaap	Revenues Revenues	383500000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	58200000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	66300000	usd
CY2023Q1	us-gaap	Assets Assets	6704500000	usd
CY2022Q4	us-gaap	Assets Assets	6845600000	usd

Files In Submission

Name	View Source	Status
ale-20230331_def.xml	Edgar Link	unprocessable
0000066756-23-000029-index-headers.html	Edgar Link	pending
0000066756-23-000029-index.html	Edgar Link	pending
0000066756-23-000029.txt	Edgar Link	pending
0000066756-23-000029-xbrl.zip	Edgar Link	pending
ale-20230331.htm	Edgar Link	pending
ale-20230331.xsd	Edgar Link	pending
ale3-31x2023exx31a.htm	Edgar Link	pending
ale3-31x2023exx31b.htm	Edgar Link	pending
ale3-31x2023exx32.htm	Edgar Link	pending
ale3-31x2023exx95.htm	Edgar Link	pending
ale3-31x2023exx99.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
logoallete201510ka14.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
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R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
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R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
ale-20230331_lab.xml	Edgar Link	unprocessable
ale-20230331_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
ale-20230331_htm.xml	Edgar Link	completed
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
ale-20230331_cal.xml	Edgar Link	unprocessable

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$ALE
ALLETE INC Stock $ale

2023 Q1 Form 10-Q Financial Statement

#000006675623000029 Filed on May 03, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALE ALLETE INC Stock $ale

2023 Q1 Form 10-Q Financial Statement

#000006675623000029 Filed on May 03, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALE
ALLETE INC Stock $ale