Fair Value [Abstract] Fair Value Financial Instruments [Abstract] Financial Instruments [Abstract] Long-Term Debt, Including Current Portion - Carrying Amount Long-term Debt Long-term Debt, Including Current Portion - Fair Value Long-term Debt, Fair Value Debt Instruments [Abstract] Debt Instrument [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Term Loan [Member] Loans Payable [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Term Loan Principal Amount Debt Instrument, Face Amount Term Loan Variable Rate Basis Debt Instrument, Description of Variable Rate Basis Term Loan Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Percentage of Debt Hedged by Interest Rate Derivatives Percentage of Debt Hedged by Interest Rate Derivatives Investments Parentheticals [Abstract] Investments Parentheticals [Abstract] Long-Term Finance Receivables, Allowance Allowance for Notes, Loans and Financing Receivable, Noncurrent Other Matters [Abstract] Other Matters [Abstract] Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] BNI Coal Reclamation Liability [Member] Reclamation liability for closing costs associated with BNI Coal mine and mine facilities. ALLETE Properties Performance and Maintenance Obligations [Member] Performance and maintenance obligations to governmental entities to construct improvements in various projects. Town Center Community Development District [Member] Community development district obligations for Town Center District. Palm Coast Park Community Development District [Member] Community development district obligations for Palm Coast Park District. Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Surety Bond Amount Environmental Loss Contingency, Surety Bond Amount of surety bonds that are available for future payment obligations related to environmental commitments and/or contingencies. Reclamation Letter of Credit Environmental Loss Contingency, Letters of Credit Amount of letters of credit that are available for the future payment of environmental commitments and/or contingencies. Total Current Estimated Reclamation Liability Mine Reclamation and Closing Liability, Noncurrent Surety Bond and Letters of Credit Environmental Loss Contingency, Surety Bond and Letters of Credit Amount of surety bonds outstanding and letters of credit to government entities that are available for future payment obligations related to environmental commitments and contingencies. Performance and Maintenance Obligations Performance and Maintenance Obligations Estimated costs remaining on performance and maintenance obligations. Bond Amount Special Assessment Bond Bond Interest Rate Community Development District Obligation, Bond Interest Rate Interest rate of capital improvement revenue and special assessment bonds used to fund real estate development projects. Bond Term (Years) Community Development District Obligation, Bond Term, in Years Term (in years) of capital improvement revenue and special assessment bonds used to fund real estate development projects. Ownership of Property Benefited Community Development District Obligation, Ownership of Property Benefited Ownership percentage of property benefitied by a real estate development project funded by municipal capital improvement revenue and special assessment bonds. Annual Assessment Community Development District Obligation, Annual Assessment Amount of annual assessments based on ownership percentage of benefited property related to real estate development projects funded by municipal capital improvement revenue and special assessment bonds. Transmission [Abstract] Transmission [Abstract] Transmission [Table] Transmission [Table] Presents detailed information about transmission investments. Transmission [Axis] Information about each transmission investment. Transmission [Domain] Name of transmission investment. CapX2020 [Member] CapX2020 [Member] CapX2020 (all projects) [Member] CapX2020 Fargo to Monticello Projects [Member] Transmission investment projects. CapX2020 Monticello to St. Cloud Project [Member] Transmission investment project. CapX2020 Bemidji to Grand Rapids Project [Member] Transmission investment project. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Transmission [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Number of CapX2020 Projects Number of Projects Number of projects. Transmission Line Length (Miles) Transmission Line Length (Miles) Length of a transmission line in miles. Transmission Line Capacity (kV) Transmission Line Capacity (kV) Capacity of a transmission line in kilovolts. Capital Cost Spent to Date Capital cost spent to date for project. Estimated Capital Expenditures Estimated Capital Expenditures The estimated amount of certain future capital expenditures related to environmental compliance, regulatory matters, or other committments and/or contingencies. Regulatory Matters [Abstract] Regulatory Matters [Abstract] Regulatory Assets and Liabilities [Table Text Block] Schedule of Regulatory Assets and Liabilities [Text Block] Earnings Per Share and Common Stock [Abstract] Earnings Per Share and Common Stock [Abstract] Reconciliation of Basic and Diluted Earnings Per Share [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Recurring Fair Value Measures [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Recurring Fair Value Measurements [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Recurring Fair Value Measures [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets [Abstract] Assets, Fair Value Disclosure [Abstract] Investments [Abstract] Investments [Abstract] Available-for-sale - Equity Securities Available For Sale Securities Fair Value Disclosure, Equity Securities This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represeent Available-for-sale Securities which consist of all investments in certain equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options and put options, but do not include convertible debt. Available-for-sale - Corporate Debt Securities Available-For-Sale Securities Fair Value Disclosure, Debt Securities This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. Cash Equivalents Investments, Cash and Cash Equivalents, Fair Value Disclosure This element represents the portion of the balance sheet Investments line item's cash and cash equivalents, valued at fair value by the entity. Total Fair Value of Assets Assets, Fair Value Disclosure Liabilities [Abstract] Liabilities, Fair Value Disclosure [Abstract] Deferred Compensation Deferred Compensation, Fair Value Disclosure This element represents the portion of the balance sheet assertion, Deferred Compensation, valued at fair value by the entity. Derivatives - Interest Rate Swap Derivative Liability Total Fair Value of Liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Total Net Fair Value of Assets (Liabilities) Fair Value, Net Asset (Liability) Fair Value [Abstract] Fair Value Disclosures [Abstract] Fair Value Activity in Level 3 Fair Value Activity in Level 3 Fair Value Activity in Level 3 Fair Value Hierarchy Transfers, All Levels Fair Value Hierarchy Transfers, All Levels The amount of transfers in and out of levels 1, 2 and 3 of the fair value hierarchy during the period. Other Income (Expense) [Abstract] Other Income (Expense) [Abstract] Other Income (Expense) [Text Block] Other Income and Other Expense Disclosure [Text Block] Investment in ATC [Abstract] Investment in ATC [Abstract] ALLETE's Investment in ATC [Table Text Block] Equity Method Investments [Table Text Block] ATC Summarized Financial Data [Table Text Block] Equity Method Investment, Schedule of Summarized Financial Data [Table Text Block] Tabular disclosure of summarized financial data reported by an equity method investment of the entity. Commitments, Guarantees and Contingencies [Abstract] Commitments, Guarantees and Contingencies [Abstract] Commitments, Guarantees and Contingencies [Text Block] Commitments Contingencies and Guarantees [Text Block] Electric Rates [Abstract] Electric Rates [Abstract] Rate Regulation [Table] Rate Regulation [Table] Rate Revision [Axis] Rate Revisions [Axis] Information about periodic rate revisions. Rate Revisions [Domain] Periodic rate revisions. MPUC 2010 Minnesota Rate Case [Member] 2010 Rate Case [Member] Retail rate increase request filed with the Minnesota Public Utilities Commission (MPUC). FERC-Approved Wholesale Rates [Member] Wholesale rates approved by the Federal Energy Regulatory Commission (FERC). PSCW 2012 Wisconsin Rate Case [Member] 2012 Wisconsin Rate Case [Member] 2012 retail rate increase requested filed with the Public Service Commission of Wisconsin (PSCW). Rate Type [Axis] Rate Type [Axis] Rate Type [Axis] including categories like electric rates, natural gas rates, water rates, etc. Rate Information by Type [Domain] Rate Information by Type [Domain] Rate Information by Type [Domain] Electric Rates [Member] Electric Rates [Member] Electric Rates [Member] Natural Gas Rates [Member] Natural Gas Rates [Member] Natural Gas Rates [Member] Water Rates [Member] Water Rates [Member] Water Rates [Member] Customer Class [Axis] Customer Class [Axis] Customer Class [Axis] description of customer types or classes Customer Informtaion by Customer Class [Domain] Customer Informtaion by Customer Class [Domain] Customer Informtaion by Customer Class [Domain] Municipal Customers [Member] Municipal Customers [Member] Municipal Customers [Member] include cities, governments and other municipalities Non-Affiliated Private Utility [Member] Non-Affiliated Private Utility [Member] Non-Affiliated Private Utility municipal customer [Member] Retail Customers [Member] Retail Customers [Member] Retail Customers [Member] include residential customers, commercial customers and industrial customers. Generating Facility Axis [Axis] Generating Facility Axis [Axis] Name of generating unit or facility [Axis] Generating Facility Unit Name [Domain] Generating Facility Unit Name [Domain] [Domain] for Name of generating unit or facility [Axis] Bison Wind Energy Center [Member] Bison Wind Energy Center [Member] Bison Wind Energy Center [Member] includes all Bison Wind Facilities Rate Regulation [Line Items] [Line Items] for Rate Regulation [Table] Approved Rate of Return on Common Equity Rate of return on common equity approved by the regulatory commission through a rate case proceeding. Approved Percentage of Capital Structure Related to Equity Percentage of capital structure related to equity approved by the regulatory commission through a rate case proceeding. Number of Customers Number of Customers Number of Customers Length of Notice Required to Terminate (in Years) Length of Notice Required to Terminate (Years) The length of notice required to terminate a contract (in years). Average Monthly Demand (in MWs) Average Monthly Demand (in MWs) The Average Monthly Demand (in MWs) Approved Rate Increase or Decrease Approved Rate Increase or Decrease The rate increase or decrease approved by appropriate regulatory body Amount Of Estimated Additional Revenue Amount Of Estimated Additional Revenue The amount of estimated additional revenue generated on an annualized basis as a result of a rate increase. Generating Capacity (MW) Generating Capacity (MW) Capacity of a generating facility, unit, or project in megawatts. Operations and Significant Accounting Policies [Abstract] Operations and Significant Accounting Policies [Abstract] Inventories [Abstract] Inventory, Net [Abstract] Fuel Energy Related Inventory Materials and Supplies Inventory, Raw Materials and Supplies, Net of Reserves Total Inventories Inventory, Net Prepayments and Other Current Assets [Abstract] Prepaid Expense and Other Assets, Current [Abstract] Deferred Fuel Adjustment Clause Deferred Fuel Cost Other Other Assets, Current Total Prepayments and Other Current Assets Prepaid Expense and Other Assets, Current Other Current Liabilites [Abstract] Other Liabilities, Current [Abstract] Customer Deposits Customer Deposits, Current Other Other Accrued Liabilities, Current Total Other Current Liabilities Other Liabilities, Current Other Non-Current Liabilities [Abstract] Other Liabilities, Noncurrent [Abstract] Asset Retirement Obligation Asset Retirement Obligations, Noncurrent Other Other Accrued Liabilities, Noncurrent Total Other Non-Current Liabilities Other Liabilities, Noncurrent Supplemental Statement of Cash Flows Information [Abstract] Supplemental Cash Flow Elements [Abstract] Cash Paid During the Period for Interest - Net of Amounts Capitalized Interest Paid, Net Cash Paid During the Period for Income Taxes Income Taxes Paid, Net Noncash Investing and Financing Activities [Abstract] Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Decrease in Accounts Payable for Capital Additions to Property, Plant and Equipment Capital Expenditures Incurred but Not yet Paid Capitalized Asset Retirement Costs Asset Retirement Obligation, Liabilities Incurred AFUDC - Equity Increase (Decrease) in Allowance for Equity Funds Used During Construction Reclassifications Out of Accumualted Other Comprehensive Income (Loss) [Abstract] Reclassifications Out of Accumualted Other Comprehensive Income [Abstract] Reclassifications Out of Accumulated Other Comprhensive Income (Loss) [Text Block] Disclosure of Reclassification Amount [Text Block] Schedule of Regulatory Assets and Liabilities [Table] Schedule of Regulatory Assets and Liabilities [Table] Regulatory Asset [Axis] Regulatory Asset [Domain] Deferred Fuel [Member] Deferred Fuel Costs [Member] Future Benefit Obligations Under Defined Benefit Pension and Other Postretirement Benefit Plans [Member] Pension Costs [Member] Income Taxes [Member] Deferred Income Tax Charge [Member] Asset Retirement Obligation [Member] Asset Retirement Obligation Costs [Member] Cost Recovery Riders [Member] Current Cost Recovery Rider [Member] Current Cost Recovery Rider [Member] PPACA Income Tax Deferral [Member] Medicare Part D Regulatory Asset [Member] Discloses the amount of regulatory asset arising from the deferral of the retail portion of a tax charge taken in 2010 resulting from the Patient Protection and Affordable Care Act of 2010 (PPACA). Conservation Improvement Program [Member] Conservation Improvement Program [Member] Conservation Improvement Program [Member] Other [Member] Other Regulatory Assets [Member] Discloses the amount of other regulatory assets. Regulatory Liability [Axis] Regulatory Liability [Axis] Regulatory Liability [Domain] Regulatory Liability [Domain] Plant Removal Obligations [Member] Plant Removal Obligations Costs [Member] Costs provided for the removal of plant assets that are reasonably expected to be recovered in rates charged to customers. Regulatory asset or liability is recognized for differences in the timing of recognition of the period costs for financial reporting and rate-making purposes. Wholesale and Retail Contra AFUDC [Member] Wholesale and Retail Contra AFUDC [Member] Wholesale and Retail Contra AFUDC [Member] Other [Member] Other Regulatory Liabilities [Member] Discloses the amount of other regulatory liabilties. Regulatory Assets and Liabilities [Line Items] Regulatory Assets and Liabilities [Line Items] Current Regulatory Assets Regulatory Assets, Current Non-Current Regulatory Assets Regulatory Assets, Noncurrent Total Regulatory Assets Regulatory Assets Non-Current Regulatory Liabilities Regulatory Liability, Noncurrent Consolidated Statement of Income [Abstract] Consolidated Statement of Income [Abstract] Statement [Table] Scenario [Axis] Scenario, Unspecified [Domain] Statement [Line Items] Operating Revenue Regulated and Unregulated Operating Revenue Operating Expenses [Abstract] Cost of Revenue [Abstract] Fuel and Purchased Power Cost of Purchased Power Operating and Maintenance Utilities Operating Expense, Maintenance and Operations Depreciation Utilities Operating Expense, Depreciation and Amortization Total Operating Expenses Utilities Operating Expense Operating Income Operating Income (Loss) Other Income (Expense) [Abstract] Nonoperating Income (Expense) [Abstract] Interest Expense Interest Expense Equity Earnings in ATC Income (Loss) from Equity Method Investments Other Other Nonoperating Income (Expense) Total Other Expense Nonoperating Income (Expense) Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income Tax Expense Income Tax Expense (Benefit) Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Average Shares of Common Stock [Abstract] Earnings Per Share [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Basic Earnings Per Share of Common Stock Earnings Per Share, Basic Diluted Earnings Per Share of Common Stock Earnings Per Share, Diluted Dividends Per Share of Common Stock Common Stock, Dividends, Per Share, Declared Regulatory Matters [Text Block] Public Utilities Disclosure [Text Block] Income Tax Expense [Abstract] Income Tax Expense [Abstract] Current Tax Expense (Benefit) [Abstract] Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Total Current Tax Expense (Benefit) Current Income Tax Expense (Benefit) Deferred Tax Expense (Benefit) [Abstract] Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Investment Tax Credit Amortization Deferred Other Tax Expense (Benefit) Total Deferred Tax Expense Deferred Income Tax Expense (Benefit) Total Income Tax Expense Effective Income Tax Rate Effective Income Tax Rate Reconciliation, Percent Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Uncertain Tax Positions [Abstract] Income Tax Uncertainties [Abstract] Gross Unrecognized Tax Benefits Unrecognized Tax Benefits Unrecognized Tax Benefits that Would Favorably Impact Effective Tax Rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Derivatives [Abstract] DERIVATIVES [Abstract] Derivatives [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Consolidated Balance Sheet [Abstract] Consolidated Balance Sheet [Abstract] Accounts Receivable [Abstract] Accounts Receivable, Net, Current [Abstract] Accounts Receivable, Allowance Allowance for Doubtful Accounts Receivable, Current Common Stock [Abstract] Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Common Stock, Par Value Common Stock, No Par Value Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares Outstanding Common Stock, Shares, Outstanding Earnings Per Share and Common Stock [Text Block] Earnings Per Share [Text Block] Business Segments [Abstract] Business Segments [Abstract] Business Segments [Table] Schedule of Segment Reporting Information, by Segment [Table] Business Segments [Axis] Segments [Axis] Business Segments [Domain] Segments [Domain] Regulated Operations [Member] Regulated Operation [Member] Investments and Other [Member] Other Segments [Member] Business Segments [Line Items] Segment Reporting Information [Line Items] Land in Minnesota (in acres) Number of acres of land available-for-sale (in acres) Number of acres of land available-for-sale. Fuel and Purchased Power Expense Operating and Maintenance Expense Depreciation Expense Operating Income (Loss) Interest Expense Other Income (Expense) Income (Loss) Before Income Taxes Income Tax Expense (Benefit) Net Income Total Assets Assets Property, Plant and Equipment - Net Property, Plant and Equipment, Net Accumulated Depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Capital Additions Property, Plant and Equipment, Additions Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Pending Litigation [Member] Pending Litigation [Member] Legal Proceedings [Line Items] Loss Contingencies [Line Items] Damages Sought Loss Contingency, Damages Sought, Value Recurring Fair Value Measures [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Financial Instruments [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Power Purchase Agreements [Abstract] -- None. No documentation exists for this element. -- Power Purchase Agreements [Table] Long-term Contracts for Purchase of Electric Power [Table] Power Purchase Agreements [Axis] Long-term Contract for Purchase of Electric Power [Axis] Power Purchase Agreements [Domain] Long-term Contract for Purchase of Electric Power [Domain] Square Butte PPA [Member] Long-term contract with Square Butte for the purchase of electric power. Minnkota PPA [Member] Minnkota PPA [Member] Minnkota PPA [Member] Oliver Wind I PPA [Member] Long-term contract with an affiliate of NextEra Energy, Inc. for the purchase of electric power. Oliver Wind II PPA [Member] Long-term contract with an affiliate of NextEra Energy, Inc. for the purchase of electric power. Manitoba Hydro PPA (expires April 2015) [Member] Long-term contract with Manitoba Hydro for the purchase of electric power. Manitoba Hydro PPA (expires April 2022) [Member] Long-term contract with Manitoba Hydro for the purchase of electric power. Manitoba Hydro PPA (expires 2035) [Member] Manitoba Hydro PPA (expires 2035) [Member] Manitoba Hydro PPA (expires 2035) [Member] Square Butte Coal-fired Unit [Member] Square Butte Coal-fired Unit [Member] Square Butte Coal-fired Unit located near Center, North Dakota Transmission [Axis] Transmission [Domain] Great Northern Transmission Line [Member] Great Northern Transmission Line [Member] Great Northern Transmission Line between Manitoba and Minnesota's Iron Range [Member] Power Purchase Agreements [Line Items] Long-term Contract for Purchase of Electric Power [Line Items] Output Entitlement Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased PPA Counterparty Debt Outstanding Long-term Contract for Purchase of Electric Power, Amount of Long-term Debt or Lease Obligation Outstanding Annual Debt Service Long-term Contract for Purchase of Electric Power, Annual Minimum Debt Service Payment Required Power Purchased under Long-term Contracts Utilities Operating Expense, Purchased Power under Long-term Contracts Interest Expense Long-term Contract for Purchase of Electric Power, Interest Included in Contract Charges Output Being Purchased (MW) Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased (MW) Share of plant output being purchased in megawatts under a long-term contract to purchase electricity from a production plant constructed and financed by a public utility district, cooperative, or other organization. Term of Contract (Years) Long-term Contract for Purchase of Electric Power, Term of Contract (Years) Term in years of long-term contract to purchase electricity from a production plant constructed and financed by a public utility district, cooperative, or other organization. Fixed Capacity Carges Long-Term Contract for Purchase of Electric Power, Fixed Capacity Carges Long-Term Contract for Purchase of Electric Power, Fixed Capacity Carges Output Being Purchased (MWh) Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased (MWh) Share of plant output being purchased in megawatthours under a long-term contract to purchase electricity from a production plant constructed and financed by a public utility district, cooperative, or other organization. Changes in Accumulated Other Comprehensive Loss by Component [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassifications Out of Accumulated Other Comprehensive Loss [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Income Tax Expense [Text Block] Income Tax Disclosure [Text Block] Short-Term and Long-Term Debt [Abstract] SHORT-TERM AND LONG-TERM DEBT [Abstract] Short-Term and Long-Term Debt [Text Block] Debt Disclosure [Text Block] Business Segments [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Inventories [Policy Text Block] Inventory, Policy [Policy Text Block] Subsequent Events [Policy Text Block] Subsequent Events, Policy [Policy Text Block] New Accounting Standards [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Land Inventory [Policy Text Block] Investment, Policy [Policy Text Block] Long-Term Finance Receivables [Policy Text Block] Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block] Derivatives [Policy Text Block] Derivatives, Policy [Policy Text Block] Fair Value Transfers [Policy Text Block] Fair Value Transfer, Policy [Policy Text Block] Regulatory Assets and Liabilities [Policy Text Block] Public Utilities, Policy [Policy Text Block] Equity Method Investments [Policy Text Block] Equity Method Investments, Policy [Policy Text Block] Environmental Costs [Policy Text Block] Environmental Costs, Policy [Policy Text Block] Consolidated Statement of Comprehensive Income Parentheticals [Abstract] Consolidated Statement of Comprehensive Income Parentheticals [Abstract] Unrealized Gain (Loss) on Securities, Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized Gain (Loss) on Derivatives, Tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Defined Benefit Pension and Other Postretirement Benefit Plans, Tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax The Patient Protection and Affordable Care Act of 2010 (PPACA) [Abstract] The Patient Protection and Affordable Care Act of 2010 (PPACA) [Abstract] Unusual or Infrequent Item [Table] Unusual or Infrequent Item [Table] Unusual or Infrequent Item [Axis] Unusual or Infrequent Item [Axis] Unusual or Infrequent Item [Domain] Unusual or Infrequent Item [Domain] Elimination of Medicare Part D [Member] PPACA Elimination of Medicare Part D [Member] PPACA Elimination of Medicare Part D [Member] Unusual or Infrequent Item [Line Items] Unusual or Infrequent Item [Line Items] Reversal of Previously Recorded Tax Benefit Tax Adjustments, Settlements, and Unusual Provisions Deferred Income Tax Benefit Inventories [Table Text Block] Schedule of Inventory, Current [Table Text Block] Prepayments and Other Current Assets [Table Text Block] Schedule of Other Current Assets [Table Text Block] Other Current and Non-Current Liabilities [Table Text Block] Schedule of Other Assets and Other Liabilities [Table Text Block] Supplemental Statement of Cash Flows Information [Table Text Block] Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Pension and Other Postretirement Benefit Plans [Abstract] Pension and Other Postretirement Benefit Plans [Abstract] Components of Net Periodic Benefit Expense [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Long-term Debt Instruments [Table] ALLETE Bonds 4.86% Series Due 2013 [Member] 4.86% Series Due 2013 [Member] First Mortgage Bonds, 4.86% Series Due 2013 [Member] ALLETE Bonds 1.83% Due April 2018 [Member] ALLETE Bonds 1.83% Due April2018 [Member] ALLETE Bonds 1.83% Due April2018 [Member] ALLETE Bonds 3.30% Due October 2028 [Member] ALLETE Bonds 3.30% Due October2028 [Member] ALLETE Bonds 3.30% Due October2028 [Member] ALLETE Bonds 4.21% Due October 2043 [Member] ALLETE Bonds 4.21% Due October2043 [Member] ALLETE Bonds 4.21% Due October2043 [Member] Short-Term Debt Outstanding Long-term Debt, Current Maturities Long-Term Debt Outstanding Long-term Debt, Excluding Current Maturities Proceeds from Issuance of First Mortgage Bonds Proceeds from Issuance of First Mortgage Bond First Mortgage Bonds, Interest Rate Debt Instrument, Interest Rate, Stated Percentage Financial Covenants [Abstract] Required Indebtedness to Total Capital Ratio Debt Instrument, Required Indebtedness to Total Capital Ratio Indebtedness to total capital ratio required to be maintained by most restrictive financial covenant. Actual Indebtedness to Total Capital Ratio Debt Instrument, Actual Indebtedness to Total Capital Ratio Actual indebtedness to total capital ratio required to be maintained by most restrictive financial covenant. Investments [Text Block] Investment [Text Block] Pension and Other Postretirement Benefit Plans [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Pension and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Pension and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension [Member] Pension Plan, Defined Benefit [Member] Other Postretirement [Member] Other Postretirement Benefit Plan, Defined Benefit [Member] Pension and Other Postretirement Benefit Plans [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Components of Net Periodic Benefit Expense [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service Cost Defined Benefit Plan, Service Cost Interest Cost Defined Benefit Plan, Interest Cost Expected Return on Plan Assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of Prior Service Costs Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of Net Loss Defined Benefit Plan, Amortization of Gains (Losses) Amortization of Transition Obligation Defined Benefit Plan, Amortization of Transition Obligations (Assets) Net Periodic Benefit Expense Defined Benefit Plan, Net Periodic Benefit Cost Contributions Defined Benefit Plan, Contributions by Employer Estimated Future Contributions Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Derivative [Line Items] Derivative [Line Items] Interest Rate Swap Variable Rate Basis Derivative, Description of Variable Rate Basis Interest Rate Swap Fixed Interest Rate Derivative, Fixed Interest Rate Interest Rate Cash Flow Hedge Effectiveness Assessment and Measurement Discussion of Interest Rate Cash Flow Hedge Effectiveness Assessment and Measurement Interest Rate Swap Liability Interest Rate Cash Flow Hedge Liability at Fair Value Investment in ATC [Text Block] Equity Method Investments and Joint Ventures Disclosure [Text Block] First Mortgage Bonds Issuance [Table Text Block] Schedule of Long-term Debt Instruments [Table Text Block] Consolidated Statement of Cash Flows [Abstract] Consolidated Statement of Cash Flows [Abstract] Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Net Income Allowance for Funds Used During Construction - Equity Income from Equity Investments, Net of Dividends Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Gain on Sale of Assets Gain (Loss) on Disposition of Other Assets Gain on Sale of Investments Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Depreciation Expense Depreciation Amortization of Debt Issuance Costs Amortization of Financing Costs Deferred Income Tax Expense Share-Based Compensation Expense Share-based Compensation ESOP Compensation Expense Employee Stock Ownership Plan (ESOP), Compensation Expense Defined Benefit Pension and Postretirement Benefit Expense Pension and Other Postretirement Benefit Expense Bad Debt Expense Provision for Doubtful Accounts Changes in Operating Assets and Liabilities [Abstract] Increase (Decrease) in Operating Capital [Abstract] Accounts Receivable Increase (Decrease) in Accounts and Other Receivables Inventories Increase (Decrease) in Inventories Prepayments and Other Increase (Decrease) in Prepaid Expense and Other Assets Accounts Payable Increase (Decrease) in Accounts Payable Other Current Liabilities Increase (Decrease) in Other Current Liabilities Cash Contributions to Defined Benefit Pension and Other Postretirement Benefit Plans Pension and Other Postretirement Benefit Contributions Changes in Regulatory and Other Non-Current Assets Increase (Decrease) in Other Noncurrent Assets Changes in Regulatory and Other Non-Current Liabilities Increase (Decrease) in Other Noncurrent Liabilities Cash from Operating Activities Net Cash Provided by (Used in) Operating Activities Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from Sale of Available-for-sale Securities Proceeds from Sale of Available-for-sale Securities Payments for Purchase of Available-for-sale Securities Payments to Acquire Available-for-sale Securities Investment in ATC Payments to Acquire Interest in Subsidiaries and Affiliates Changes to Other Investments Payments for (Proceeds from) Other Investing Activities Additions to Property, Plant and Equipment Payments to Acquire Property, Plant, and Equipment Proceeds from Sale of Assets Proceeds from Sale of Productive Assets Cash for Investing Activities Net Cash Provided by (Used in) Investing Activities Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from Issuance of Common Stock Proceeds from Issuance of Long-Term Debt Proceeds from Issuance of Long-term Debt Payments for Notes Payable Repayments of Notes Payable Payments for Long-Term Debt Repayments of Long-term Debt Debt Issuance Costs Payments of Debt Issuance Costs Dividends on Common Stock Payments of Ordinary Dividends, Common Stock Cash from Financing Activities Net Cash Provided by (Used in) Financing Activities Change in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents at Beginning of Period Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents at End of Period Environmental Matters [Abstract] Environmental Matters [Abstract] Schedule of Utility Generating Facilities [Table] Schedule of Utility Generating Facilities [Table] Schedule of Generating Facilities owned by the Utility Boswell Unit 4 [Member] Boswell Unit 4 [Member] Boswell Unit 4 [Member] Schedule of Utility Generating Facilities [Line Items] Schedule of Utility Generating Facilities [Line Items] [Line Items] for Schedule of Generating Facilities owned by the Utility Antidilutive Shares Excluded from EPS Computation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Reconciliation of Basic and Diluted Earnings Per Share [Abstract] Earnings Per Share Reconciliation [Abstract] Earnings Per Share - Basic [Abstract] Earnings Per Share, Basic [Abstract] Net Income Net Income (Loss) Available to Common Stockholders, Basic Average Common Shares Earnings Per Share Earnings Per Share - Diluted [Abstract] Earnings Per Share, Diluted [Abstract] Net Income Net Income (Loss) Available to Common Stockholders, Diluted Average Common Shares Earnings Per Share Dilutive Securities (Shares) Weighted Average Number Diluted Shares Outstanding Adjustment Business Segments [Text Block] Segment Reporting Disclosure [Text Block] Other Income (Expense) [Table Text Block] Schedule of Other Nonoperating Income (Expense) [Table Text Block] Leasing Agreements [Abstract] Leasing Agreements [Abstract] Leasing Agreements [Table] Schedule of Operating Leased Assets [Table] Leasing Agreements [Axis] Property, Plant and Equipment, Type [Axis] Leasing Agreements [Domain] Property, Plant and Equipment, Type [Domain] BNI Coal Dragline Lease [Member] Exploration and Production Equipment [Member] Leasing Agreements [Line Items] Operating Leased Assets [Line Items] Termination Fee Termination Fee A lump sum payment in conjunction with a lease termination. Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Other Investments and ALLETE Properties [Table Text Block] Investment [Table Text Block] Coal Rail and Shipping Contracts [Abstract] Coal Rail and Shipping Contracts [Abstract] Coal, Rail and Shipping Contracts [Table] Recorded Unconditional Purchase Obligation [Table] Coal, Rail and Shipping Contracts [Axis] Recorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Coal, Rail and Shipping Contracts [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Coal and Transportation [Member] Coal and Transportation [Member] Coal, Rail and Shipping Contracts [Line Items] Recorded Unconditional Purchase Obligation [Line Items] Minimum Annual Payment Obligation, Current Year Recorded Unconditional Purchase Obligation Due in Next Twelve Months Minimum Annual Payment Obligation, Year Two Recorded Unconditional Purchase Obligation Due in Second Year Consolidated Statement of Comprehensive Income [Abstract] Consolidated Statement of Comprehensive Income [Abstract] Statement [Table] Scenario [Axis] Scenario, Unspecified [Domain] Statement [Line Items] Comprehensive Income (Loss) [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other Comprehensive Income (Loss) [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized Gain (Loss) on Securities, Net of Income Taxes of $0.1, $(0.5), $0.1 and $0.2 Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized Gain (Loss) on Derivatives, Net of Income Taxes of $0.1, $-, $0.1 and $(0.1) Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Defined Benefit Pension and Other Postretirement Benefit Plans, Net of Income Taxes of $0.3, $0.4, $0.5 and $0.7 Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Total Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Pension and Other Postretirement Benefit Plans [Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block] Ownership Percentage Equity Method Investment, Ownership Percentage Approved Return on Common Equity Equity Method Investment, Approved Return on Common Equity The approved percentage return on common equity dedicated to the utility plant in the investee accounted for under the equity method of accounting. Expected Additional Investment Equity Method Investment, Expected Additional Investment Additional investments expected to be made during the current fiscal year but after the filing date, not already separately disclosed as part of current period/year-to-date investments or as a subsequent event. ALLETE's Investment in ATC [Roll Forward] ALLETE's Investment in ATC [Roll Forward] ALLETE's Investment in ATC [Roll Forward] Equity Investment Balance as of December 31, 2012 Equity Method Investments Cash Investments Payments to Acquire Equity Method Investments Distributed ATC Earnings Proceeds from Equity Method Investment, Dividends or Distributions Equity Investment Balance as of June 30, 2013 ATC Summarized Financial Data [Abstract] Equity Method Investment, Summarized Financial Information [Abstract] Revenue Equity Method Investment, Summarized Financial Information, Revenue Operating Expense Equity Method Investment, Summarized Financial Information, Operating Expense The amount of the operating expense reported by an equity method investment of the entity. Other Expense Equity Method Investment, Summarized Financial Information, Other Expense The amount of other expense reported by an equity method investment of the entity. Net Income Equity Method Investment, Summarized Financial Information, Net Income (Loss) ALLETE's Equity in Net Income Boswell Mercury Emissions Reduction Plan [Abstract] Boswell Mercury Emissions Reduction Plan [Abstract] Consolidated Balance Sheet [Abstract] Statement of Financial Position [Abstract] Assets [Abstract] Current Assets [Abstract] Assets, Current [Abstract] Cash and Cash Equivalents Accounts Receivable (Less Allowance of $1.1 and $1.0) Accounts Receivable, Net, Current Inventories Prepayments and Other Total Current Assets Assets, Current Regulatory Assets Investment in ATC Other Investments Other Long-term Investments Other Non-Current Assets Other Assets, Noncurrent Total Assets Liabilities and Equity [Abstract] Liabilities [Abstract] Current Liabilities [Abstract] Liabilities, Current [Abstract] Accounts Payable Accounts Payable, Current Accrued Taxes Taxes Payable, Current Accrued Interest Interest Payable, Current Long-Term Debt Due Within One Year Other Total Current Liabilities Liabilities, Current Long-Term Debt Deferred Income Taxes Deferred Tax Liabilities, Net, Noncurrent Regulatory Liabilities Defined Benefit Pension and Other Postretirement Benefit Plans Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Noncurrent Other Non-Current Liabilities Total Liabilities Liabilities Commitments, Guarantees and Contingencies (Note 14) Commitments and Contingencies Equity [Abstract] Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common Stock Without Par Value, 80.0 Shares Authorized, 40.1 and 39.4 Shares Outstanding Common Stock, Value, Issued Unearned ESOP Shares Unearned ESOP Shares Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained Earnings Retained Earnings (Accumulated Deficit) Total Equity Stockholders' Equity Attributable to Parent Total Liabilities and Equity Liabilities and Equity Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Income Tax Expense [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] ALLETE Properties SEC Schedule III, Real Estate, Gross Available-for-sale Securities Available-for-sale Securities, Noncurrent Other Other Investments Total Other Investments Available-for-sale Corporate Debt Securities, Maturities, One Year or Less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Corporate Debt Securities, Maturities, More than One Year to Less than Three Years Available-for-sale Securities, Debt Maturities, After One Year Through Three Years, Fair Value Amount of available-for-sale debt securities at fair value maturing after the first fiscal year through the third fiscal year following the latest fiscal year (maturing in more than one year to less than three years). Available-for-sale Corporate Debt Securities, Maturities, Three Years to Less than Five Years Available-for-sale Securities, Debt Maturities, After Three Years Through Five Years, Fair Value Amount of available-for-sale debt securities at fair value maturing after the third fiscal year through the fifth fiscal year following the latest fiscal year (maturing in three years to less than five years). Available-for-sale Corporate Debt Securities, Maturities, Five Years or More Available-for-sale Securities, Debt Maturities, After Five Years, Fair Value Amount of available-for-sale debt securities at fair value maturing in after the fifth fiscal year following the latest fiscal year (maturing in five years or more). ALLETE Properties [Rollforward] SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward] Land Inventory Beginning Balance Land Available-for-sale Deeds to Collateralized Property SEC Schedule III, Real Estate, Acquisitions Through Foreclosures Cost of Sales SEC Schedule III, Real Estate, Cost of Real Estate Sold Capitalized Improvements and Other SEC Schedule III, Real Estate, Improvements Land Inventory Ending Balance Long-Term Finance Reveivables (net of allowances of $0.6 and $0.6) Notes, Loans and Financing Receivable, Net, Noncurrent Other Other Real Estate Total Real Estate Assets Impairment of Real Estate Impairment of Real Estate Fair Value [Text Block] Fair Value Disclosures [Text Block] Gain on Sale of Available-for-sale Securities Available-for-sale Securities, Gross Realized Gains Investments and Other Income Other Income Total Other Income Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Unrealized Gains and Losses on Available-for-sale Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member] Defined Benefit Pension, Other Postretirement Items [Member] Accumulated Defined Benefit Plans Adjustment [Member] Gains and Losses on Cash Flow Hedge [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Income (Expense) - Other [Member] Other Income [Member] Income Tax Expense [Member] Income Tax Expense (Benefit) [Member] Income Tax Expense (Benefit) [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other Comprehensive Income (Loss) Before Reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts Reclassified From Accumulated Other Comprehensive Loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net Other Comprehensive Income Reclassifications Out of Accumulated Other Comprehensive Income [Abstract] Reclassifications Out of Accumulated Other Comprehensive Income [Abstract] Reclassifications Out of Accumulated Other Comprehensive Income [Abstract] AOCI Reclassification, Unrealized Gains on Available-for-sale Securities, Before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax AOCI Reclassification, Unrealized Gains on Available-for-sale Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax AOCI Reclassification, Amortization of Defined Benefit Pension and Other Postretirement Items, Before Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax AOCI Reclassification, Amortization of Pension and Other Postretirement Items, Prior Service Costs, Before Tax Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax AOCI Reclassification, Amortization of Defined Benefit Pension and Other Postretirement Items, Actuarial Gains and Losses, Before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax AOCI Reclassification, Amortization of Defined Benefit Pension and Other Postretirement Items, Tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax Operations and Significant Accounting Policies [Text Block] Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]