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as $ 14.0 million, $ 13.4 million,
text
13.4
monetaryItemType
text: <entity> 13.4 </entity> <entity type> monetaryItemType </entity type> <context> as $ 14.0 million, $ 13.4 million, </context>
us-gaap:DefinedContributionPlanCostRecognized
and $ 12.2 million, respectively.
text
12.2
monetaryItemType
text: <entity> 12.2 </entity> <entity type> monetaryItemType </entity type> <context> and $ 12.2 million, respectively. </context>
us-gaap:DefinedContributionPlanCostRecognized
The accumulated benefit obligation for all defined benefit pension plans was $ 360.7 million and
text
360.7
monetaryItemType
text: <entity> 360.7 </entity> <entity type> monetaryItemType </entity type> <context> The accumulated benefit obligation for all defined benefit pension plans was $ 360.7 million and </context>
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
281.1
monetaryItemType
text: <entity> 281.1 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
278.4
monetaryItemType
text: <entity> 278.4 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
224.0
monetaryItemType
text: <entity> 224.0 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
262.7
monetaryItemType
text: <entity> 262.7 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
251.0
monetaryItemType
text: <entity> 251.0 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation
were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re
text
210.4
monetaryItemType
text: <entity> 210.4 </entity> <entity type> monetaryItemType </entity type> <context> were $ 281.1 million, $ 278.4 million, and $ 224.0 million, respectively, as of December 31, 2023 and $ 262.7 million, $ 251.0 million, and $ 210.4 million, re </context>
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
The accumulated benefit obligation and fair value of plan assets for other postretirement benefit plans with an accumulated benefit obligation in excess of plan assets were $ 21.3 million and $ 0.0 million , respectively, as of December 31, 2023 and were
text
21.3
monetaryItemType
text: <entity> 21.3 </entity> <entity type> monetaryItemType </entity type> <context> The accumulated benefit obligation and fair value of plan assets for other postretirement benefit plans with an accumulated benefit obligation in excess of plan assets were $ 21.3 million and $ 0.0 million , respectively, as of Decemb...
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
The accumulated benefit obligation and fair value of plan assets for other postretirement benefit plans with an accumulated benefit obligation in excess of plan assets were $ 21.3 million and $ 0.0 million , respectively, as of December 31, 2023 and were
text
0.0 million
monetaryItemType
text: <entity> 0.0 million </entity> <entity type> monetaryItemType </entity type> <context> The accumulated benefit obligation and fair value of plan assets for other postretirement benefit plans with an accumulated benefit obligation in excess of plan assets were $ 21.3 million and $ 0.0 million , respectively, as of...
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
$ 19.9 million and $ 0.0 million ,
text
19.9
monetaryItemType
text: <entity> 19.9 </entity> <entity type> monetaryItemType </entity type> <context> $ 19.9 million and $ 0.0 million , </context>
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
$ 19.9 million and $ 0.0 million ,
text
0.0 million
monetaryItemType
text: <entity> 0.0 million </entity> <entity type> monetaryItemType </entity type> <context> $ 19.9 million and $ 0.0 million , </context>
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
We recorded settlement losses totaling $ 1.2 million during 2022. The settlement losses were the result of lump-sum payments to participants that exceeded the sum of the pension plan's respective annual service cost and interest cost amounts.
text
1.2
monetaryItemType
text: <entity> 1.2 </entity> <entity type> monetaryItemType </entity type> <context> We recorded settlement losses totaling $ 1.2 million during 2022. The settlement losses were the result of lump-sum payments to participants that exceeded the sum of the pension plan's respective annual service cost and interest cost a...
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
45
percentItemType
text: <entity> 45 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
60
percentItemType
text: <entity> 60 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
40
percentItemType
text: <entity> 40 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
55
percentItemType
text: <entity> 55 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
80
percentItemType
text: <entity> 80 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
90
percentItemType
text: <entity> 90 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
10
percentItemType
text: <entity> 10 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pension plans where the majority of the participants are in payment or terminated vest...
text
20
percentItemType
text: <entity> 20 </entity> <entity type> percentItemType </entity type> <context> Absent regulatory or statutory limitations, the target asset allocation for the investment of the assets for our ongoing pension plans is 45 - 60 % in asset protection investments and 40 - 55 % in asset growth investments and for our pen...
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
We anticipate contributing $ 12.3 million and $ 1.5 million to our pension and other postretirement plans, respectively, during 2024.
text
12.3
monetaryItemType
text: <entity> 12.3 </entity> <entity type> monetaryItemType </entity type> <context> We anticipate contributing $ 12.3 million and $ 1.5 million to our pension and other postretirement plans, respectively, during 2024. </context>
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
We anticipate contributing $ 12.3 million and $ 1.5 million to our pension and other postretirement plans, respectively, during 2024.
text
1.5
monetaryItemType
text: <entity> 1.5 </entity> <entity type> monetaryItemType </entity type> <context> We anticipate contributing $ 12.3 million and $ 1.5 million to our pension and other postretirement plans, respectively, during 2024. </context>
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
In addition, we reclassified $ 0.1 million of accumulated foreign currency translation gains associated with the sale of the Hite JV.
text
0.1
monetaryItemType
text: <entity> 0.1 </entity> <entity type> monetaryItemType </entity type> <context> In addition, we reclassified $ 0.1 million of accumulated foreign currency translation gains associated with the sale of the Hite JV. </context>
us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax
At December 31, 2023, the total unrecognized compensation cost related to all nonvested awards was $ 31.5 million. That cost is expected to be recognized over a weighted-average period of 2.0 years. Historically, we have issued treasury shares, if available, to satisfy award c
text
31.5
monetaryItemType
text: <entity> 31.5 </entity> <entity type> monetaryItemType </entity type> <context> At December 31, 2023, the total unrecognized compensation cost related to all nonvested awards was $ 31.5 million. That cost is expected to be recognized over a weighted-average period of 2.0 years. Historically, we have issued treasu...
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
We sell our products to many customers in several markets across multiple geographic areas. The ten largest customers, of which seven are distributors, constitute in aggregate approximately 44 %, 45 %, and 44 % of revenues in 2023, 2022, and 2021, respectively.
text
44
percentItemType
text: <entity> 44 </entity> <entity type> percentItemType </entity type> <context> We sell our products to many customers in several markets across multiple geographic areas. The ten largest customers, of which seven are distributors, constitute in aggregate approximately 44 %, 45 %, and 44 % of revenues in 2023, 2022,...
us-gaap:ConcentrationRiskPercentage1
We sell our products to many customers in several markets across multiple geographic areas. The ten largest customers, of which seven are distributors, constitute in aggregate approximately 44 %, 45 %, and 44 % of revenues in 2023, 2022, and 2021, respectively.
text
45
percentItemType
text: <entity> 45 </entity> <entity type> percentItemType </entity type> <context> We sell our products to many customers in several markets across multiple geographic areas. The ten largest customers, of which seven are distributors, constitute in aggregate approximately 44 %, 45 %, and 44 % of revenues in 2023, 2022,...
us-gaap:ConcentrationRiskPercentage1
At December 31, 2023, we were committed to purchase approximately 2.7 million pounds of copper at an aggregate fixed cost of $ 10.5 million. At December 31, 2023, this fixed cost was $ 0.1 million greater than the market cost that would be incurred on a spot purchase of the same amount of copper. The aggregate market c...
text
10.5
monetaryItemType
text: <entity> 10.5 </entity> <entity type> monetaryItemType </entity type> <context> At December 31, 2023, we were committed to purchase approximately 2.7 million pounds of copper at an aggregate fixed cost of $ 10.5 million. At December 31, 2023, this fixed cost was $ 0.1 million greater than the market cost that wou...
us-gaap:RecordedUnconditionalPurchaseObligation
Approximately 27 % of our labor force is covered by collective bargaining agreements at various locations around the world, and we expect to renegotiate these agreements during 2024.
text
27
percentItemType
text: <entity> 27 </entity> <entity type> percentItemType </entity type> <context> Approximately 27 % of our labor force is covered by collective bargaining agreements at various locations around the world, and we expect to renegotiate these agreements during 2024. </context>
us-gaap:ConcentrationRiskPercentage1
At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure obligations we have for a variety of commercial reasons, such as workers compensation self-...
text
10.6
monetaryItemType
text: <entity> 10.6 </entity> <entity type> monetaryItemType </entity type> <context> At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure oblig...
us-gaap:LossContingencyEstimateOfPossibleLoss
At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure obligations we have for a variety of commercial reasons, such as workers compensation self-...
text
4.7
monetaryItemType
text: <entity> 4.7 </entity> <entity type> monetaryItemType </entity type> <context> At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure obliga...
us-gaap:LossContingencyEstimateOfPossibleLoss
At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure obligations we have for a variety of commercial reasons, such as workers compensation self-...
text
4.6
monetaryItemType
text: <entity> 4.6 </entity> <entity type> monetaryItemType </entity type> <context> At December 31, 2023, we were party to unused standby letters of credit, surety bonds, and bank guarantees totaling $ 10.6 million, $ 4.7 million, and $ 4.6 million, respectively. These commitments are generally issued to secure obliga...
us-gaap:LossContingencyEstimateOfPossibleLoss
We present two reportable segments: Regulated Operations and ALLETE Clean Energy. Our segments were determined in accordance with the guidance on segment reporting. We measure performance of our operations through budgeting and monitoring of contributions to consolidated net income by each business segment.
text
two
integerItemType
text: <entity> two </entity> <entity type> integerItemType </entity type> <context> We present two reportable segments: Regulated Operations and ALLETE Clean Energy. Our segments were determined in accordance with the guidance on segment reporting. We measure performance of our operations through budgeting and monitori...
us-gaap:NumberOfReportableSegments
Our investment in Nobles 2 represents a 49 percent equity interest in Nobles 2, the entity that owns and operates a 250 MW wind energy facility in southwestern Minnesota pursuant to a 20 -year PPA with Minnesota Power.
text
49
percentItemType
text: <entity> 49 </entity> <entity type> percentItemType </entity type> <context> Our investment in Nobles 2 represents a 49 percent equity interest in Nobles 2, the entity that owns and operates a 250 MW wind energy facility in southwestern Minnesota pursuant to a 20 -year PPA with Minnesota Power. </context>
us-gaap:EquityMethodInvestmentOwnershipPercentage
BNI Energy mines and sells lignite coal to two North Dakota mine-mouth generating units, one of which is Square Butte. In 2024, Square Butte supplied 50 percent ( 227.5 MW) of its output to Minnesota Power under long-term contracts. (See Note 9. Commitments, Guarantees and Contingencies.)
text
50
percentItemType
text: <entity> 50 </entity> <entity type> percentItemType </entity type> <context> BNI Energy mines and sells lignite coal to two North Dakota mine-mouth generating units, one of which is Square Butte. In 2024, Square Butte supplied 50 percent ( 227.5 MW) of its output to Minnesota Power under long-term contracts. (See...
us-gaap:LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchased
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
13.3
monetaryItemType
text: <entity> 13.3 </entity> <entity type> monetaryItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, ...
us-gaap:AccountsReceivableGross
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
11.2
monetaryItemType
text: <entity> 11.2 </entity> <entity type> monetaryItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, ...
us-gaap:AccountsReceivableGross
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
33
percentItemType
text: <entity> 33 </entity> <entity type> percentItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 202...
us-gaap:ConcentrationRiskPercentage1
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
27
percentItemType
text: <entity> 27 </entity> <entity type> percentItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 202...
us-gaap:ConcentrationRiskPercentage1
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
32
percentItemType
text: <entity> 32 </entity> <entity type> percentItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 202...
us-gaap:ConcentrationRiskPercentage1
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
21
percentItemType
text: <entity> 21 </entity> <entity type> percentItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 202...
us-gaap:ConcentrationRiskPercentage1
We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 2024 ($ 11.2 million as of December 31, 2023). Minnesota Power does not obtain collate...
text
26
percentItemType
text: <entity> 26 </entity> <entity type> percentItemType </entity type> <context> We are subject to concentration of credit risk primarily as a result of accounts receivable. Minnesota Power sells electricity to eight Large Power Customers. Receivables from these customers totaled $ 13.3 million as of December 31, 202...
us-gaap:ConcentrationRiskPercentage1
Prepayments and Other on the Consolidated Balance Sheet included $ 32.4 million of costs in excess of billings at New Energy as of December 31, 2024 ($ 21.5 million as of December 31, 2023).
text
32.4
monetaryItemType
text: <entity> 32.4 </entity> <entity type> monetaryItemType </entity type> <context> Prepayments and Other on the Consolidated Balance Sheet included $ 32.4 million of costs in excess of billings at New Energy as of December 31, 2024 ($ 21.5 million as of December 31, 2023). </context>
us-gaap:OtherAssetsCurrent
Prepayments and Other on the Consolidated Balance Sheet included $ 32.4 million of costs in excess of billings at New Energy as of December 31, 2024 ($ 21.5 million as of December 31, 2023).
text
21.5
monetaryItemType
text: <entity> 21.5 </entity> <entity type> monetaryItemType </entity type> <context> Prepayments and Other on the Consolidated Balance Sheet included $ 32.4 million of costs in excess of billings at New Energy as of December 31, 2024 ($ 21.5 million as of December 31, 2023). </context>
us-gaap:OtherAssetsCurrent
(a) The asset retirement obligation is primarily related to our Regulated Operations and is funded through customer rates over the life of the related assets. Additionally, BNI Energy funds its obligation through its cost-plus coal supply agreements for which BNI Energy has recorded a receivable of $ 42.3 million in ...
text
42.3
monetaryItemType
text: <entity> 42.3 </entity> <entity type> monetaryItemType </entity type> <context> (a) The asset retirement obligation is primarily related to our Regulated Operations and is funded through customer rates over the life of the related assets. Additionally, BNI Energy funds its obligation through its cost-plus coal ...
us-gaap:OtherReceivables
(a) The asset retirement obligation is primarily related to our Regulated Operations and is funded through customer rates over the life of the related assets. Additionally, BNI Energy funds its obligation through its cost-plus coal supply agreements for which BNI Energy has recorded a receivable of $ 42.3 million in ...
text
37.2
monetaryItemType
text: <entity> 37.2 </entity> <entity type> monetaryItemType </entity type> <context> (a) The asset retirement obligation is primarily related to our Regulated Operations and is funded through customer rates over the life of the related assets. Additionally, BNI Energy funds its obligation through its cost-plus coal ...
us-gaap:OtherReceivables
The majority of our operating leases are for heavy equipment, vehicles and land with fixed monthly payments which we group into two categories: Vehicles and Equipment; and Land and Other. Our largest operating lease is for the drag line at BNI Energy which includes a termination payment at the end of the lease term if ...
text
3
monetaryItemType
text: <entity> 3 </entity> <entity type> monetaryItemType </entity type> <context> The majority of our operating leases are for heavy equipment, vehicles and land with fixed monthly payments which we group into two categories: Vehicles and Equipment; and Land and Other. Our largest operating lease is for the drag line ...
us-gaap:ResidualValueOfLeasedAsset
includes sales recognized from contracts with customers in the taconite mining, paper, pulp and secondary wood products, pipeline and other industries. Industrial sales accounted for approximately 56 percent of total regulated utility kWh sales for the year ended December 31, 2024. Within industrial revenue, Minnesota ...
text
60
monetaryItemType
text: <entity> 60 </entity> <entity type> monetaryItemType </entity type> <context> includes sales recognized from contracts with customers in the taconite mining, paper, pulp and secondary wood products, pipeline and other industries. Industrial sales accounted for approximately 56 percent of total regulated utility k...
us-gaap:RevenueRemainingPerformanceObligation
includes sales recognized from contracts with customers in the taconite mining, paper, pulp and secondary wood products, pipeline and other industries. Industrial sales accounted for approximately 56 percent of total regulated utility kWh sales for the year ended December 31, 2024. Within industrial revenue, Minnesota ...
text
10
monetaryItemType
text: <entity> 10 </entity> <entity type> monetaryItemType </entity type> <context> includes sales recognized from contracts with customers in the taconite mining, paper, pulp and secondary wood products, pipeline and other industries. Industrial sales accounted for approximately 56 percent of total regulated utility k...
us-gaap:RevenueRemainingPerformanceObligation
We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. As of December 31, ...
text
15.9
monetaryItemType
text: <entity> 15.9 </entity> <entity type> monetaryItemType </entity type> <context> We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capit...
us-gaap:ContractWithCustomerAssetNetNoncurrent
We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. As of December 31, ...
text
18.5
monetaryItemType
text: <entity> 18.5 </entity> <entity type> monetaryItemType </entity type> <context> We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capit...
us-gaap:ContractWithCustomerAssetNetNoncurrent
We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. As of December 31, ...
text
2.4
monetaryItemType
text: <entity> 2.4 </entity> <entity type> monetaryItemType </entity type> <context> We recognize as an asset the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We expense incremental costs when the asset that would have resulted from capita...
us-gaap:CapitalizedContractCostAmortization
Interest and Investment Income for the year ended December 31, 2023, reflects $ 5.1 million of interest income related to interest awarded as part of an arbitration ruling involving a subsidiary of ALLETE Clean Energy. (See Note 9. Commitments, Guarantees and Contingencies.)
text
5.1
monetaryItemType
text: <entity> 5.1 </entity> <entity type> monetaryItemType </entity type> <context> Interest and Investment Income for the year ended December 31, 2023, reflects $ 5.1 million of interest income related to interest awarded as part of an arbitration ruling involving a subsidiary of ALLETE Clean Energy. (See Note 9. Com...
us-gaap:OtherNonoperatingIncomeExpense
Minnesota Power owns 80 percent of the 585 MW Boswell Unit 4. While Minnesota Power operates the plant, certain decisions about the operations of Boswell Unit 4 are subject to the oversight of a committee on which it and WPPI Energy, the owner of the remaining 20 percent, have equal representation and voting rights. Ea...
text
80
percentItemType
text: <entity> 80 </entity> <entity type> percentItemType </entity type> <context> Minnesota Power owns 80 percent of the 585 MW Boswell Unit 4. While Minnesota Power operates the plant, certain decisions about the operations of Boswell Unit 4 are subject to the oversight of a committee on which it and WPPI Energy, the...
us-gaap:JointlyOwnedUtilityPlantProportionateOwnershipShare
South Shore Energy, ALLETE’s non-rate regulated, Wisconsin subsidiary, is developing NTEC, an approximately 600 MW proposed combined-cycle natural gas-fired generating facility to be built in Superior, Wisconsin, which will be jointly owned by Dairyland Power Cooperative, Basin and South Shore Energy. Minnesota Power i...
text
20
percentItemType
text: <entity> 20 </entity> <entity type> percentItemType </entity type> <context> South Shore Energy, ALLETE’s non-rate regulated, Wisconsin subsidiary, is developing NTEC, an approximately 600 MW proposed combined-cycle natural gas-fired generating facility to be built in Superior, Wisconsin, which will be jointly ow...
us-gaap:LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchased
.) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022).
text
20.0
monetaryItemType
text: <entity> 20.0 </entity> <entity type> monetaryItemType </entity type> <context> .) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022). </context>
us-gaap:RegulatedOperatingRevenueOther
.) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022).
text
57.0
monetaryItemType
text: <entity> 57.0 </entity> <entity type> monetaryItemType </entity type> <context> .) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022). </context>
us-gaap:RegulatedOperatingRevenueOther
.) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022).
text
38.8
monetaryItemType
text: <entity> 38.8 </entity> <entity type> monetaryItemType </entity type> <context> .) Revenue from cost recovery riders was $ 20.0 million in 2024 ($ 57.0 million in 2023; $ 38.8 million in 2022). </context>
us-gaap:RegulatedOperatingRevenueOther
Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s 2022 general rate case beginning in January 2022, and the resolution of Minnesota Pow...
text
9.25
percentItemType
text: <entity> 9.25 </entity> <entity type> percentItemType </entity type> <context> Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s ...
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s 2022 general rate case beginning in January 2022, and the resolution of Minnesota Pow...
text
53.81
percentItemType
text: <entity> 53.81 </entity> <entity type> percentItemType </entity type> <context> Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s...
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s 2022 general rate case beginning in January 2022, and the resolution of Minnesota Pow...
text
9.65
percentItemType
text: <entity> 9.65 </entity> <entity type> percentItemType </entity type> <context> Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s ...
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s 2022 general rate case beginning in January 2022, and the resolution of Minnesota Pow...
text
52.50
percentItemType
text: <entity> 52.50 </entity> <entity type> percentItemType </entity type> <context> Minnesota Power’s retail base rates through 2022 were based on a 2018 MPUC retail rate order that allowed for a 9.25 percent return on common equity and a 53.81 percent equity ratio. Interim rates were implemented in Minnesota Power’s...
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
.) Minnesota Power expects to implement updated rates based on the 2024 MPUC retail rate order in the first quarter of 2025. This order allows for a return on equity 9.78 percent and an equity ratio of 53.00 percent.
text
9.78
percentItemType
text: <entity> 9.78 </entity> <entity type> percentItemType </entity type> <context> .) Minnesota Power expects to implement updated rates based on the 2024 MPUC retail rate order in the first quarter of 2025. This order allows for a return on equity 9.78 percent and an equity ratio of 53.00 percent. </context>
us-gaap:PublicUtilitiesRequestedReturnOnEquityPercentage
.) Minnesota Power expects to implement updated rates based on the 2024 MPUC retail rate order in the first quarter of 2025. This order allows for a return on equity 9.78 percent and an equity ratio of 53.00 percent.
text
53.00
percentItemType
text: <entity> 53.00 </entity> <entity type> percentItemType </entity type> <context> .) Minnesota Power expects to implement updated rates based on the 2024 MPUC retail rate order in the first quarter of 2025. This order allows for a return on equity 9.78 percent and an equity ratio of 53.00 percent. </context>
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing sought a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an a...
text
12.00
percentItemType
text: <entity> 12.00 </entity> <entity type> percentItemType </entity type> <context> On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filin...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreasePercentage
On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing sought a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an a...
text
10.30
percentItemType
text: <entity> 10.30 </entity> <entity type> percentItemType </entity type> <context> On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filin...
us-gaap:PublicUtilitiesRequestedReturnOnEquityPercentage
On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing sought a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an a...
text
53.00
percentItemType
text: <entity> 53.00 </entity> <entity type> percentItemType </entity type> <context> On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filin...
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing sought a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an a...
text
89
monetaryItemType
text: <entity> 89 </entity> <entity type> monetaryItemType </entity type> <context> On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing ...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing sought a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an a...
text
64
monetaryItemType
text: <entity> 64 </entity> <entity type> monetaryItemType </entity type> <context> On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing ...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail rate increase request. As part of the settlement agreement, the parties agreed on all ...
text
33.97
monetaryItemType
text: <entity> 33.97 </entity> <entity type> monetaryItemType </entity type> <context> On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail rate increase request. As part of the settlement agreement, the parties agreed on all ...
text
9.78
percentItemType
text: <entity> 9.78 </entity> <entity type> percentItemType </entity type> <context> On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail r...
us-gaap:PublicUtilitiesRequestedReturnOnEquityPercentage
On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail rate increase request. As part of the settlement agreement, the parties agreed on all ...
text
53.00
percentItemType
text: <entity> 53.00 </entity> <entity type> percentItemType </entity type> <context> On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail ...
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail rate increase request. As part of the settlement agreement, the parties agreed on all ...
text
23.0
monetaryItemType
text: <entity> 23.0 </entity> <entity type> monetaryItemType </entity type> <context> On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail ...
us-gaap:RegulatoryLiabilities
. In an order dated February 28, 2023, the MPUC made determinations regarding Minnesota Power’s general rate case including allowing a return on common equity of 9.65 percent and a 52.50 percent equity ratio. In March 2023, Minnesota Power filed a petition for reconsideration with the MPUC requesting reconsideration an...
text
9.65
percentItemType
text: <entity> 9.65 </entity> <entity type> percentItemType </entity type> <context> . In an order dated February 28, 2023, the MPUC made determinations regarding Minnesota Power’s general rate case including allowing a return on common equity of 9.65 percent and a 52.50 percent equity ratio. In March 2023, Minnesota P...
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
. In an order dated February 28, 2023, the MPUC made determinations regarding Minnesota Power’s general rate case including allowing a return on common equity of 9.65 percent and a 52.50 percent equity ratio. In March 2023, Minnesota Power filed a petition for reconsideration with the MPUC requesting reconsideration an...
text
52.50
percentItemType
text: <entity> 52.50 </entity> <entity type> percentItemType </entity type> <context> . In an order dated February 28, 2023, the MPUC made determinations regarding Minnesota Power’s general rate case including allowing a return on common equity of 9.65 percent and a 52.50 percent equity ratio. In March 2023, Minnesota ...
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
In an order dated September 29, 2023, the MPUC approved Minnesota Power’s final rates, which were implemented beginning on October 1, 2023. The MPUC order also approved Minnesota Power’s interim rate refund plan. Interim rates were collected through the third quarter of 2023 with reserves recorded as necessary. Minneso...
text
39
monetaryItemType
text: <entity> 39 </entity> <entity type> monetaryItemType </entity type> <context> In an order dated September 29, 2023, the MPUC approved Minnesota Power’s final rates, which were implemented beginning on October 1, 2023. The MPUC order also approved Minnesota Power’s interim rate refund plan. Interim rates were coll...
us-gaap:CustomerRefundLiabilityCurrent
In an order dated September 29, 2023, the MPUC approved Minnesota Power’s final rates, which were implemented beginning on October 1, 2023. The MPUC order also approved Minnesota Power’s interim rate refund plan. Interim rates were collected through the third quarter of 2023 with reserves recorded as necessary. Minneso...
text
18
monetaryItemType
text: <entity> 18 </entity> <entity type> monetaryItemType </entity type> <context> In an order dated September 29, 2023, the MPUC approved Minnesota Power’s final rates, which were implemented beginning on October 1, 2023. The MPUC order also approved Minnesota Power’s interim rate refund plan. Interim rates were coll...
us-gaap:CustomerRefundLiabilityCurrent
Minnesota Power incurred higher fuel and purchased power costs in 2022 than those factored in its fuel adjustment forecast filed in May 2021 for 2022, which resulted in the recognition of an approximately $ 13 million regulatory asset as of December 31, 2022. The MPUC approved recovery of the regulatory asset in an ord...
text
13
monetaryItemType
text: <entity> 13 </entity> <entity type> monetaryItemType </entity type> <context> Minnesota Power incurred higher fuel and purchased power costs in 2022 than those factored in its fuel adjustment forecast filed in May 2021 for 2022, which resulted in the recognition of an approximately $ 13 million regulatory asset a...
us-gaap:RegulatoryAssetsNoncurrent
Minnesota Power incurred lower fuel and purchased power costs in 2023 than those factored in its fuel adjustment forecast filed in May 2022 for 2023, which resulted in the recognition of a $ 15.5 million regulatory liability as of December 31, 2023. Minnesota Power requested to refund the regulatory liability over 12 m...
text
15.5
monetaryItemType
text: <entity> 15.5 </entity> <entity type> monetaryItemType </entity type> <context> Minnesota Power incurred lower fuel and purchased power costs in 2023 than those factored in its fuel adjustment forecast filed in May 2022 for 2023, which resulted in the recognition of a $ 15.5 million regulatory liability as of Dec...
us-gaap:RegulatoryLiabilityNoncurrent
Minnesota Power incurred higher fuel and purchased power costs in 2024 than those factored in its fuel adjustment forecast filed in May 2023 for 2024, which resulted in the recognition of a $ 4.5 million regulatory asset as of December 31, 2024. Minnesota Power expects to request recovery of the regulatory asset as par...
text
4.5
monetaryItemType
text: <entity> 4.5 </entity> <entity type> monetaryItemType </entity type> <context> Minnesota Power incurred higher fuel and purchased power costs in 2024 than those factored in its fuel adjustment forecast filed in May 2023 for 2024, which resulted in the recognition of a $ 4.5 million regulatory asset as of December...
us-gaap:RegulatoryLiabilityNoncurrent
On December 30, 2024, Minnesota Power submitted a petition with the MPUC seeking deferral accounting treatment for investigative costs and the increase in depreciation expense resulting from compliance costs that will be incurred related to the new Coal Combustion Rule (CCR) Legacy Rule, which was published in the Fede...
text
4.2
monetaryItemType
text: <entity> 4.2 </entity> <entity type> monetaryItemType </entity type> <context> On December 30, 2024, Minnesota Power submitted a petition with the MPUC seeking deferral accounting treatment for investigative costs and the increase in depreciation expense resulting from compliance costs that will be incurred relat...
us-gaap:Depreciation
SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allowed return on equity to 10.00 percent and maintained an equity ratio of 55.00 percent....
text
10.40
percentItemType
text: <entity> 10.40 </entity> <entity type> percentItemType </entity type> <context> SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allo...
us-gaap:PublicUtilitiesRequestedReturnOnEquityPercentage
SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allowed return on equity to 10.00 percent and maintained an equity ratio of 55.00 percent....
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allo...
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allowed return on equity to 10.00 percent and maintained an equity ratio of 55.00 percent....
text
10.00
percentItemType
text: <entity> 10.00 </entity> <entity type> percentItemType </entity type> <context> SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allo...
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allowed return on equity to 10.00 percent and maintained an equity ratio of 55.00 percent....
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> SWL&P’s retail rates through 2022 were based on a December 2018 order by the PSCW that allowed for a return on equity of 10.40 percent and a 55.00 percent equity ratio. The resolution of SWL&P’s 2022 general rate case changed the allo...
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
.) The resolution of SWL&P’s 2024 general rate case further changed the allowed return on equity to 9.80 percent and continued to maintain an equity ratio of 55.00 percent beginning January 1, 2025. (See
text
9.80
percentItemType
text: <entity> 9.80 </entity> <entity type> percentItemType </entity type> <context> .) The resolution of SWL&P’s 2024 general rate case further changed the allowed return on equity to 9.80 percent and continued to maintain an equity ratio of 55.00 percent beginning January 1, 2025. (See </context>
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
.) The resolution of SWL&P’s 2024 general rate case further changed the allowed return on equity to 9.80 percent and continued to maintain an equity ratio of 55.00 percent beginning January 1, 2025. (See
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> .) The resolution of SWL&P’s 2024 general rate case further changed the allowed return on equity to 9.80 percent and continued to maintain an equity ratio of 55.00 percent beginning January 1, 2025. (See </context>
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
10.00
percentItemType
text: <entity> 10.00 </entity> <entity type> percentItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, t...
us-gaap:PublicUtilitiesRequestedReturnOnEquityPercentage
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, t...
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
5.90
percentItemType
text: <entity> 5.90 </entity> <entity type> percentItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, th...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreasePercentage
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
7.3
monetaryItemType
text: <entity> 7.3 </entity> <entity type> monetaryItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, th...
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
5.5
monetaryItemType
text: <entity> 5.5 </entity> <entity type> monetaryItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, th...
us-gaap:PublicUtilitiesApprovedRateIncreaseDecreaseAmount
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
9.80
percentItemType
text: <entity> 9.80 </entity> <entity type> percentItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, th...
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would have increased rates by approximately 5.90 percent for retai...
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing sought an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, t...
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023.
text
3.3
monetaryItemType
text: <entity> 3.3 </entity> <entity type> monetaryItemType </entity type> <context> In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023. </context>
us-gaap:PublicUtilitiesApprovedRateIncreaseDecreaseAmount
In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023.
text
10.00
percentItemType
text: <entity> 10.00 </entity> <entity type> percentItemType </entity type> <context> In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023. </context>
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023.
text
55.00
percentItemType
text: <entity> 55.00 </entity> <entity type> percentItemType </entity type> <context> In an order dated December 20, 2022, the PSCW approved an annual increase of $ 3.3 million reflecting a return on equity of 10.00 percent and a 55.00 percent equity ratio. Final rates went into effect January 1, 2023. </context>
us-gaap:PublicUtilitiesApprovedEquityCapitalStructurePercentage
Minnesota requires electric utilities to spend a minimum of 1.5 percent of gross operating revenues, excluding revenue received from exempt customers, from service provided in the state on ECOs each year. On April 1, 2024, Minnesota Power submitted its 2023 ECO annual filing, formerly known as the conservation improvem...
text
2.2
monetaryItemType
text: <entity> 2.2 </entity> <entity type> monetaryItemType </entity type> <context> Minnesota requires electric utilities to spend a minimum of 1.5 percent of gross operating revenues, excluding revenue received from exempt customers, from service provided in the state on ECOs each year. On April 1, 2024, Minnesota Po...
us-gaap:RegulatedOperatingRevenueOther
Minnesota requires electric utilities to spend a minimum of 1.5 percent of gross operating revenues, excluding revenue received from exempt customers, from service provided in the state on ECOs each year. On April 1, 2024, Minnesota Power submitted its 2023 ECO annual filing, formerly known as the conservation improvem...
text
1.9
monetaryItemType
text: <entity> 1.9 </entity> <entity type> monetaryItemType </entity type> <context> Minnesota requires electric utilities to spend a minimum of 1.5 percent of gross operating revenues, excluding revenue received from exempt customers, from service provided in the state on ECOs each year. On April 1, 2024, Minnesota Po...
us-gaap:RegulatedOperatingRevenueOther