Allowance for Loan and Lease Losses and Credit Quality Information Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Impaired loans with an allowance recorded Impaired Financing Receivable with Related Allowances [Member] Represents a subset of a class of financing receivables that have specific allowances related to the impaired receivables. Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Consumer real estate Consumer Real Estate Receivable [Member] Class of financing receivables related to consumer real estate receivables. First mortgage lien First Mortgage [Member] Junior lien Second Mortgage [Member] Total commercial Commercial Receivables [Member] Class of financing receivables related to commercial real estate and commercial business. Commercial real estate Commercial Real Estate Receivables [Member] Class of financing receivables related to commercial real estate. Commercial business Commercial Business Receivables [Member] Class of financing receivables related to commercial business. Leasing and Equipment Finance Leasing and Equipment Finance Receivable [Member] Represents member for leasing and equipment finance portfolios. Inventory Finance Inventory Financing Receivable [Member] Represents member for inventory finance portfolios. Auto Finance Automobile Loan [Member] Other Other Receivable [Member] Represents an amount of other receivables that are not separately disclosed. Impaired Loans Financing Receivable, Impaired [Line Items] Unpaid Contractual Balance with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Unpaid Contractual Balance without an Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Total Unpaid Contractual Balance Impaired Financing Receivable, Unpaid Principal Balance Loan Balance with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Loan Balance without an Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Total Loan Balance Impaired Financing Receivable, Recorded Investment Related Allowance Recorded Impaired Financing Receivable, Related Allowance Average Loan Balance with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Average Loan Balance without an Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Total Average Loan Balance Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized with an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Interest Income Recognized without an Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Total Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Investments, Debt and Equity Securities [Abstract] Schedule of securities Unrealized Gain (Loss) on Investments [Table Text Block] Schedule of gross unrealized losses and fair value of securities available for sale and securities held to maturity that are in a loss position Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of amortized cost and fair value of securities available for sale and securities held to maturity by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Interest income attributable to securities available for sale Interest Income On Securities Available For Sale By Taxable Status [Table Text Block] Tabular disclosure of interest income attributable to securities available for sale by taxable status. Segment Reporting [Abstract] Reportable segments, including a reconciliation of consolidated totals Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Comprehensive Income [Abstract] Net income attributable to TCF Financial Corporation Net Income (Loss) Attributable to Parent Other comprehensive income (loss), net of tax: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Net unrealized gains (losses) on securities available for sale and interest-only strips Other Comprehensive Income, Unrealized Holding Gain (Loss) On Securities And Interest Only Strips Arising During Period, Net Of Tax Other Comprehensive Income, Unrealized Holding Gain (Loss) On Securities And Interest Only Strips Arising During Period, Net Of Tax Net unrealized gains (losses) on net investment hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Recognized postretirement prior service cost Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite Lived and Indefinite Lived Intangible Assets [Table] Schedule of Finite Lived and Indefinite Lived Intangible Assets [Table] Disclosure of the carrying value of amortizable and unamortizable intangible assets, including goodwill. Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating segments Operating Segments [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Consumer Banking Consumer Banking [Member] Consumer Banking Wholesale Banking Wholesale Banking [Member] Wholesale Banking [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Program agreement Program Agreements [Member] Exclusive rights, limted to 15 years, under an agreement, to purchase and service all originations by counterparty Non-compete agreement Noncompete Agreements [Member] Customer base intangibles Customer Based Intangibles [Member] Represents the customer-based intangible assets. Deposit base intangibles Deposit Based Intangibles [Member] Represents the deposit-based intangible assets. Tradename Trade Names [Member] Goodwill and other intangible assets Finite Lived and Indefinite Lived Intangible Assets [Line Items] Goodwill Goodwill Impairment of goodwill and intangible assets Goodwill and Intangible Asset Impairment Amortizable intangible assets: Finite-Lived Intangible Assets, Net [Abstract] Gross Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Amount Finite-Lived Intangible Assets, Net Amortization expenses Amortization of Intangible Assets Estimated amortization expense for intangible assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Remainder of 2017 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Consumer Real Estate Loan Real Estate Loan [Member] Accounts, Notes, Loans and Financing Receivable Accounts, Notes, Loans and Financing Receivable [Line Items] Interest-only strips Interest Only Strips, Fair Value Disclosure Represents the total fair market value of interest-only strips. Contractual liabilities related to sale of loans Contractual liabilities related to sale of loans Contractual liabilities related to sale of loans Impairment related to consumer real estate interest-only strips Interest only Strips on Consumer Real Estate Impairment Amount Represents the amount of interest-only strips on consumer real estate loans impairment recorded during the period. Impairment related to auto finance interest-only strips Interest only Strips on Auto Finance Impairment Amount Represents the amount of interest-only strips on auto finance loans impairment recorded during the period. Commitments and Contingencies Disclosure [Abstract] Litigation Contingencies Legal Matters and Contingencies [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Summary of derivative instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of pre-tax impact of derivative activity Derivative Instruments, Gain (Loss) [Table Text Block] Earnings Per Share [Abstract] Basic Earnings Per Common Share: Earnings Per Share, Basic [Abstract] Net income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Earnings allocated to common stock Net Income (Loss) Allocated to Common Stock Net income after making adjustment for dividends on preferred stock (declared in the period), dividends on cumulative preferred stock (accumulated for the period) and income allocated to participating securities. Weighted-average common shares outstanding for basic earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Diluted Earnings Per Common Share: Earnings Per Share, Diluted [Abstract] Earnings allocated to common stock Net Income (Loss) Allocated to Common Stock, Diluted Net income after making adjustment for dividends on preferred stock (declared in the period), dividends on cumulative preferred stock (accumulated for the period), income allocated to participating securities, and dilutive securities. Weighted-average common shares outstanding used in basic earnings per common share calculation (in shares) Net dilutive effect of: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Non-participating restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average common shares outstanding for diluted earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Compensation and Retirement Disclosure [Abstract] Schedule of net periodic benefit cost included in compensation and employee benefits expense for cash balance Pension Plan and Postretirement Plan Schedule of Net Benefit Costs [Table Text Block] Debt Disclosure [Abstract] Information about long-term borrowings Schedule of Long-term Debt Instruments [Table Text Block] Cash and Cash Equivalents [Abstract] Reserve in cash on hand or at the Federal Reserve as required by Federal Reserve regulations Cash Segregated under Other Regulations Total restricted cash balance Restricted Cash and Cash Equivalents Cash held in interest-bearing accounts Interest-bearing Deposits in Banks and Other Financial Institutions Regulatory Capital Requirements [Abstract] Schedule of regulatory capital information for TCF and TCF Bank Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Class of Financing Receivable, Type of Borrower [Axis] Class of Financing Receivable, Type of Borrower [Axis] Class of Financing Receivable, Type of Borrower [Domain] Class of Financing Receivable, Type of Borrower [Domain] Consumer Borrower Consumer Borrower [Member] Commercial Borrower Commercial Borrower [Member] Mortgage Loans on Real Estate, Description, Loan Category [Axis] Mortgage Loans on Real Estate, Description, Loan Category [Axis] Mortgage Loans on Real Estate, Loan Category [Domain] Mortgage Loans on Real Estate, Loan Category [Domain] Loan Modifications for Borrowers with Financial Difficulties Financing Receivable, Modifications [Line Items] TDR loans Financing Receivable, Modifications, Recorded Investment Accruing TDR Loans Accruing Troubled Debt Restructurings The amount of the outstanding recorded investment related to accruing financing receivables that have been modified by troubled debt restructurings. Unfunded commitments to consumer real estate and commercial loans classified as TDRs Loans and Leases Receivable, Impaired, Commitment to Lend Unrecognized Interest Income Loans and Leases Receivable Impaired Interest Lost on Troubled Debt Reflects the amount of additional interest income that would have been recorded if troubled debt restructurings were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). Average yield on TDR loans (as a percent) Loans and Leases Receivable Average Yield Percentage Represents the percentage of average yield on troubled debt restructuring loans. Contractual average rate of TDR loans (as a percent) Loans and Leases Receivable Contractual Average Rate Represents the contractual average rate of troubled debt restructuring loans. Allowance on accruing TDR loans Financing Receivable, Modifications, Allowance for Credit Losses Represent reserves for losses on loan TDRs outstanding as of the balance sheet date. Allowance on accruing TDR loans (as a percent) Financing Receivable, Modifications, Allowance for Credit Losses as Percentage of Outstanding Balances Represent allowance for losses on loan TDRs as a percentage of loan TDRs outstanding as of the balance sheet date. Assumed remaining re-default rate used in determining impairment, low end of range (as a percent) Financing Receivable, Modifications, Impaired Financing Receivable, Redefault Rate, Low End of Range The low end of the range of rates used in determining the impairment on consumer real estate loan TDRs on mortgages that have already been modified due to borrower hardship. Assumed remaining re-default rate used in determining impairment, high end of range (as a percent) Financing Receivable, Modifications, Impaired Financing Receivable, Redefault Rate, High End of Range The high end of the range of rates used in determining the impairment on consumer real estate loan TDRs on mortgages that have already been modified due to borrower hardship. Percent of accruing TDR loans more than 60 days delinquent Financing Receivable, Modifications, Percentage Of Accruing TDR Loans Over 60 Day Delinquencies Represents the percentage of accruing TDR loans over 60 day delinquencies. Delinquency period of performing loans and leases Delinquency Period of Performing Loans and Leases Represents the delinquency period of performing loans and leases. Maximum period past due to be considered accruing status for consumer real estate TDR loans Maximum Period Past Due for Accruing Status for Consumer Real Estate Troubled Debt Restructuring Loans Consumer real estate TDR loans generally remain on accruing status following modification if they are less than 90 days past due and payment in full under the modified terms of the loan is expected based on a current credit evaluation and historical payment performance. Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed Financing Receivable Modifications Nonaccruing Troubled Debt Restructurings Chapter 7 Bankruptcy not Reaffirmed Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed. Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed (as a percent) Financing Receivable Modifications Nonaccruing Troubled Debt Restructurings Chapter 7 Bankruptcy not Reaffirmed as Percentage of non Accrual Troubled Debt Restructurings Balance Represents the percentage of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed. Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed, current (as a percent) Financing Receivable Modifications Nonaccruing Troubled Debt Restructurings Chapter 7 Bankruptcy not Reaffirmed as Percentage of non Accrual Troubled Debt Restructurings Balance Current Represents the percentage of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed that are current. Securities available for sale: Available-for-sale Securities, Debt Maturities [Abstract] Amortized cost, securities available for sale Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Basis Due in 1-5 years Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost Basis Due in 5-10 years Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Amortized Cost Basis Due after 10 years Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Amortized Cost Basis Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Fair value, securities available for sale Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value Due in 1-5 years Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value Due in 5-10 years Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value Due after 10 years Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Fair Value Fair Value Available-for-sale Securities Securities held to maturity: Held-to-maturity Securities, Debt Maturities [Abstract] Amortized cost, securities held to maturity Held-to-maturity Securities, Debt Maturities, Amortized Cost, Rolling Maturity [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Due in 1-5 years Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost Due in 5-10 years Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Amortized Cost Due after 10 years Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Amortized Cost Amortized Cost Held-to-maturity Securities Fair value, securities held to maturity Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value Due in 1-5 years Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value Due in 5-10 years Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value Due after 10 Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Fair Value Fair Value Held-to-maturity Securities, Fair Value New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained Earnings Retained Earnings [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09 Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-09 Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Change in Accounting Principle New Accounting Pronouncements or Change in Accounting Principle [Line Items] Change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Other Income and Expenses [Abstract] Other Non-interest Expense Other Income and Other Expense Disclosure [Text Block] Earnings Per Common Share Earnings Per Share [Text Block] Professional fees Professional Fees Advertising and marketing Marketing and Advertising Expense Loan and lease processing Loan and Lease Expense Represents the amount of expenses incurred during the period for loan and lease expense. Outside processing Outside Processing Expenses This element represents the amount of expenses incurred during the period for outside processing. Card processing and issuance costs Card Processing and Issuance Expenses This element represents the amount of expenses incurred during the period for card processing and issuance. Severance Severance Costs FDIC insurance Federal Deposit Insurance Corporation Premium Expense Other Other Noninterest Expense, Other This element represents the amount of other non-interest expenses incurred in the period not separately presented in the statement of income or in the other expense note. Total other non-interest expense Other Noninterest Expense Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Accruing and Non-accrual Loans and Leases Excluding Portfolios Acquired with Deteriorated Credit Quality Class of Financing Receivables [Member] Represents the class of financing receivables. Classes of financing receivables are generally a disaggregation of a portfolio segment. Total consumer real estate Consumer Real Estate and Other Receivable Excluding Portfolios Acquired with Deteriorated Credit Quality [Member] Represents member for consumer real estate and other receivable portfolios excluding portfolios acquired with deteriorated credit quality. Consumer real estate loans to customers in bankruptcy Consumer Real Estate Loans to Customers in Bankruptcy [Member] Represents the consumer real estate loans to customers in bankruptcy. Leasing and equipment finance Leasing and Equipment Finance Receivable Excluding Portfolios Acquired with Deteriorated Credit Quality [Member] Represents member for leasing and equipment finance portfolios excluding portfolios acquired with deteriorated credit quality. Inventory finance Auto finance Auto Financing Receivable Excluding Portfolios Acquired with Deteriorated Credit Quality [Member] Represents member for auto finance portfolios excluding portfolios acquired with deteriorated credit quality. Other Other Financing Receivable [Member] Represents member for other finance portfolios. Portfolios acquired with deteriorated credit quality Receivable Acquired with Deteriorated Credit Quality [Member] Financing receivables that were acquired with deteriorated credit quality. Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Current-59 Days Delinquent and Accruing Financing Receivables, 0 to 59 Days Past Due [Member] Financing Receivables, 0 to 59 Days Past Due [Member] 60-89 Days Delinquent and Accruing Financing Receivables, 60 to 89 Days Past Due [Member] 90 Days or More Delinquent and Accruing Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Accruing and Non-accrual Loans and Leases Financing Receivable, Recorded Investment, Past Due [Line Items] Current and Delinquent and Accruing Financing Receivable, Recorded Investment, Current and Past Due Financing Receivable, Recorded Investment, Current and Past Due Delinquent and Accruing Financing Receivable, Recorded Investment, Past Due Non-accrual Financing Receivable, Recorded Investment, Nonaccrual Status Total loans and leases Loans and Leases Receivable, Net of Deferred Income Interest income recognized on loans and leases in non-accrual status and contractual interest that would have been recorded had the loans and leases performed in accordance with their original contractual terms Loans and Leases Receivable Impaired Contractual Interest Due and Interest Recognized on Nonaccrual Loans [Abstract] Contractual interest due on non-accrual loans and leases Loans and Leases Receivable Impaired Interest Due on Nonaccrual Loans Reflects the contractual interest due on the non-accrual loans and leases. Interest income recognized on non-accrual loans and leases Loans and Leases Receivable Impaired Interest Recognized on Nonaccrual Loans The interest income recognized in the period on loans and leases in non-accrual status. Unrecognized interest income Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Investment Holdings [Table] Investment Holdings [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] U.S. Government sponsored enterprises and federal agencies Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Obligations of states and political subdivisions US States and Political Subdivisions Debt Securities [Member] Securities available for sale and securities held to maturity Investment Holdings [Line Items] Gross unrealized losses and fair value of securities available for sale that are in a loss position Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Less than 12 months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 months or more, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or more, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Gross unrealized losses and fair value of securities held to maturity that are in a loss position Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract] Less than 12 months, Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months, Unrealized Losses Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 months or more, Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or more, Unrealized Losses Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total, fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value Total, Unrealized Losses Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial instrument assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Investments Investments, Fair Value Disclosure Securities held to maturity Loans held for sale Loans Held-for-sale, Fair Value Disclosure Loans: Receivables, Fair Value Disclosure [Abstract] Consumer real estate Loans and Leases Receivable, Gross, Consumer, Real Estate Commercial real estate Loans Receivable, Gross, Commercial, Real Estate Commercial business Loans Receivable, Commercial Business This element represents the gross carrying amount of unpaid commercial loans secured by business assets other than real estate, including inventory, receivables, equipment and financial instruments. Equipment finance Loans Receivable, Equipment Financing Represents the fair value of commercial loans, which are issued for equipment financing. Inventory finance Loans Receivable, Inventory Financing Reflects the net carrying amount of unpaid commercial variable rate loans which are secured by the underlying floor planned equipment and supported by repurchase agreements from original equipment manufacturers. Auto finance Loans Receivable, Auto Finance The gross amount of loans and leases receivables related to auto finance as on reporting date. Other Loans and Leases Receivable, Gross, Consumer, Other Allowance for loan losses Loans and Leases Receivable, Allowance Securitization receivable Accounts Receivable from Securitization Total financial instrument assets Financial Instrument, Assets, Fair Value Disclosure Represents the fair value of various categories of unpaid commercial loans and other financial instruments. Financial instrument liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Demand Deposits, Fair Value Disclosure Represents the fair value of accounts that may or may not bear interest and that the depositor is entitled to withdraw at anytime without prior notice. Checking, savings and negotiable order of withdrawal (NOW) accounts are the most common forms of demand deposits. Long-term borrowings Long-term Debt, Fair Value Total financial instrument liabilities Financial Liabilities Fair Value Disclosure Financial instruments with off-balance sheet risk: Financial Instruments with Off Balance Sheet Risk [Abstract] Commitments to extend credit Fair Value Disclosure, Off Balance Sheet Risks, Amount Commitments to Extend Credit Represents the fair value of commitments to extend credit, which are not recognized in financial statements (off-balance sheet). Standby letters of credit Fair Value Disclosure, Off Balance Sheet Risks, Amount Letters of Credit Outstanding Fair Value Disclosure, Off Balance Sheet Risks, Amount Letters of Credit Outstanding Total financial instruments with off-balance sheet risk Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset Document and Entity Information 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Net unrealized gains (losses) on securities available for sale and interest-only strips: Accumulated Net Unrealized Investment And Interest Only Strip Gain Loss [Domain] Accumulated other comprehensive income (loss) resulting from appreciation (depreciation) in value of securities and interest-only strips attributable to parent. Net unrealized gains (losses) on net investment hedges Accumulated Net Gain Loss From Designated Or Qualifying Net Investment Hedges [Domain] Accumulated Net Gain Loss From Designated Or Qualifying Net Investment Hedges [Domain] Foreign currency translation adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Recognized postretirement prior service cost: Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Line Items] Unrealized gains (losses) arising during the period, before tax Other Comprehensive Income (Loss), before Reclassifications, before Tax Reclassification of net (gains) losses to net income, before tax Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Total other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax Unrealized gains (losses) arising during the period, tax Other Comprehensive Income (Loss) before Reclassifications, Tax Reclassification of net (gains) losses to net income, tax Reclassification from AOCI, Current Period, Tax Total other comprehensive income (loss), tax Other Comprehensive Income (Loss), Tax Unrealized gains (losses) arising during the period, net of tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Reclassification of net (gains) losses to net income, net of tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Available for sale securities transferred to held to maturity securities value Available-for-sale Securities Transferred to Held-to-maturity Securities Value For any transfer of securities categorized as available-for-sale, this item represents the amount of the transferred security to held-to-maturity investments. Unrealized holding gain (loss) on transfers from available for sale to held to maturity retained in accumulated other comprehensive income Unrealized Holding Gain (Loss) Transfers from Available for Sale to Held to Maturity Retained in Accumulated Other Comprehensive Income Unrealized Holding Gain (Loss) Transfers from Available for Sale to Held to Maturity Retained in Accumulated Other Comprehensive Income Statement of Financial Position [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, shares issued (shares) Common Stock, Shares, Issued Treasury stock at cost, shares (shares) Treasury Stock, Shares Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Consumer real estate Residential Portfolio Segment [Member] Commercial Commercial Portfolio Segment [Member] Leasing and equipment finance Auto finance Other Commercial real estate Permanent Construction and development Construction Loans [Member] Commercial business Loans and Leases Receivable Disclosure Loans and Leases Receivable Disclosure [Line Items] Loans and leases Loan and lease adjustments Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Offsetting Assets and Liabilities [Table] Offsetting Assets and Liabilities [Table] Disclosure of information about derivative and financial assets and derivative and financial liabilities that are subject to offsetting, including enforceable master netting arrangements. Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate contracts Interest Rate Contract [Member] Interest rate lock commitments Interest Rate Lock Commitments [Member] Forward foreign exchange contracts Foreign Exchange Contract [Member] Other contracts Other Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not designated as hedges Not Designated as Hedging Instrument [Member] Designated as hedges Designated as Hedging Instrument [Member] Amounts relevant to offsetting of derivative assets and liabilities Offsetting Assets and Liabilities [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. Derivative assets Offsetting Derivative Assets [Abstract] Notional Amount Derivative Asset, Notional Amount Gross Amounts Recognized Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset Derivative Asset, Fair Value, Gross Liability Net Amount Presented Derivative Asset Derivative liabilities Offsetting Derivative Liabilities [Abstract] Notional Amount Derivative Liability, Notional Amount Gross Amounts Recognized Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset Derivative Liability, Fair Value, Gross Asset Net Amount Presented Derivative Liability Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Forward foreign exchange contracts Foreign Exchange Forward [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Non-interest income Noninterest Income [Member] Primary financial statement caption in which reported facts about noninterest income have been included. Non-interest expense Noninterest Expense [Member] Primary financial statement caption in which reported facts about noninterest expense have been included. Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Other comprehensive income (loss) Other Comprehensive Income (Loss) [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair value hedging Fair Value Hedging [Member] Net investment hedges Net Investment Hedging [Member] Derivative instruments, gain (loss) Derivative Instruments, Gain (Loss) [Line Items] Net gain (loss) recognized Derivative, Gain (Loss) on Derivative, Net Net gain (loss) recognized on non-derivative hedged items Non-derivative Hedged Item, Gain (Loss) on Non-derivative Item, Net Non-derivative Hedged Item, Gain (Loss) on Non-derivative Item, Net Net investment hedges: Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract] Net unrealized gain (loss) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Credit risk-related contingent features Derivative, Credit Risk Related Contingent Features [Abstract] Forward foreign exchange contracts with credit risk-related contingent features, notional value Forward Foreign Exchange Contracts with Credit Risk Related Contingent Features Notional Value Represents the notional amount of forward foreign exchange contracts with credit risk-related contingent features. Additional collateral required, if TCF was rated less than BB- by Standard and Poor's Additional Collateral, Aggregate Fair Value Forward foreign exchange contracts with credit risk-related contingent features, net liability amount Derivative, Net Liability Position, Aggregate Fair Value Derivative, Collateral Derivative, Collateral [Abstract] Cash collateral posted Collateral Already Posted, Aggregate Fair Value Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] TCF Parent Company [Member] TCF Bank Subsidiaries [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Compliance with Regulatory Capital Requirements under Banking Regulations Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Percentage of net retained profits for the current year combined with retained net profits for the preceding two calendar years that can be declared as dividend Percentage of Net Retained Profits for Current Year Combined with Retained Net Profits for Preceding Two Calendar Years that Can be Declared as Dividend Represents the percentage of net retained profits for the current year combined with retained net profits for the preceding two calendar years that can be declared as dividend. Number of prior calendar years considered for payment of dividends in excess of net retained profit Number of Prior Calendar Years, Considered for Payment of Dividends, Requiring Prior Approval of OCC Represents the number of prior calendar years considered for payment of dividends in excess of net retained profits, for which prior approval from the OCC is required. Net profits for the current year combined with retained net profits for preceding two calendar years Net Retained Profits for Current Year Combined with Retained Net Profits for Preceding Two Calendar Years Represents the net retained profits for the current year combined with retained net profits for preceding two calendar years. Capital conservation buffer excluded from minimum capital requirement capital conservation buffer capital conservation buffer Regulatory Capital: Capital [Abstract] Common equity Tier 1 capital Tier One Common Equity Tier One Common Equity Tier 1 capital Tier One Risk Based Capital Total capital Capital Common equity Tier 1 capital ratio Common Equity Ratios [Abstract] Common Equity Ratios [Abstract] Actual, Ratio Tier One Common Capital to Risk Weighted Assets Tier One Common Capital to Risk Weighted Assets Well-Capitalized Capital Requirement, Ratio Tier One Common Capital Required to be Well Capitalized to Risk Weighted Assets Tier One Common Capital Required to be Well Capitalized to Risk Weighted Assets Minimum Capital Requirement, Ratio Tier One Common Capital Required for Capital Adequacy to Risk Weighted Assets Tier One Common Capital Required for Capital Adequacy to Risk Weighted Assets Tier 1 risk-based capital ratio Risk Based Ratios [Abstract] Actual, Ratio Tier One Risk Based Capital to Risk Weighted Assets Well-Capitalized Capital Requirement, Ratio Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Minimum Capital Requirement, Ratio Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Total risk-based capital ratio Total Risk Based Ratios [Abstract] Actual, Ratio Capital to Risk Weighted Assets Well-Capitalized Capital Requirement, Ratio Capital Required to be Well Capitalized to Risk Weighted Assets Minimum Capital Requirement, Ratio Capital Required for Capital Adequacy to Risk Weighted Assets Tier 1 leverage ratio Leverage Ratios [Abstract] Actual, Ratio Tier One Leverage Capital to Average Assets Well-Capitalized Capital Requirement, Ratio Tier One Leverage Capital Required to be Well Capitalized to Average Assets Minimum Capital Requirement, Ratio Tier One Leverage Capital Required for Capital Adequacy to Average Assets Allowance for Loan and Lease Losses and Credit Quality Information Allowance for Loan Lease Losses and Credit Quality Information Disclosure [Text Block] Represents entire disclosure for allowance for categories of Loan and Lease Losses and Credit Quality Information. Other Non-interest Expense Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Long-term Borrowings Long-term Debt [Text Block] Fair Value, Option, Quantitative Disclosures [Table] Fair Value, Option, Quantitative Disclosures [Table] Eligible Item or Group for Fair Value Option [Axis] Financial Instrument [Axis] Fair Value, Option, Eligible Item or Group [Domain] Financial Instruments [Domain] Loans held for sale Loans Held-For-Sale [Member] Loans Held-For-Sale [Member] Gain (Loss) on Sales of Consumer Loans Gain (Loss) on Sales of Consumer Loans [Member] Gain (Loss) on Sales of Consumer Loans [Member] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Fair value carrying amount Assets, Fair Value Disclosure Aggregate unpaid principal amount Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Fair value carrying amount less aggregate unpaid principal Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables Net gain from initial measurement of the above loans and subsequent changes in fair value for loans outstanding Fair Value, Option, Changes in Fair Value, Gain (Loss) Schedule of Gain (Loss) on Investments [Table] Schedule of Gain (Loss) on Investments [Table] Investments by Category [Axis] Investments by Category [Axis] Marketable Securities and Investments Held at Cost [Domain] Marketable Securities and Investments Held at Cost [Domain] Securities available for sale Available-for-sale Securities [Member] Interest Income on Securities Available for Sale by Taxable Status Gain (Loss) on Investments [Line Items] Taxable interest income Interest Income, Securities, Operating, Taxable Tax-exempt interest income Interest Income, Securities, Operating, Tax Exempt Total interest income, securities available for sale Interest and Dividend Income, Securities, Operating, Available-for-sale Schedule of goodwill and other intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Information about loans and leases Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loan sales transaction table Loan sales transaction table [Table Text Block] Loan sales transaction table [Table Text Block] Interest only strips and contractual liabilites Interest only strips and contractual liabilities [Table Text Block] Interest only strips and contractual liabilities [Table Text Block] Loans and Leases Financing Receivables [Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Consumer Real Estate Consumer Real Estate and Other Receivable [Member] Class of financing receivables related to consumer real estate and other receivables. Commercial Allowance for loan and lease losses, other credit loss reserves Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for loan and lease losses Allowance for Loan and Lease Losses [Roll Forward] Balance, beginning of period Charge-offs Allowance for Loan and Lease Losses, Write-offs Recoveries Allowance for Loan and Lease Loss, Recovery of Bad Debts Net (charge-offs) recoveries Allowance for Loan and Lease Losses Write-offs, Net Provision for credit losses Provision for Loan and Lease Losses Other Allowance for Loan and Lease Losses, Adjustments, Other Balance, end of period Loans Loan Transactions, Excluding Securitizations [Member] Category of loan transactions, excluding loans transferred to trusts in securitization transactions. Securitizations Securitization Transactions [Member] Category of loan transactions that are securitization transactions. Sales proceeds, net sales proceeds, net The cash inflow associated with the sale of loans receivables arising from the financing of goods and services including transaction fees and other sales related costs. Securitization receivable Securitization Receivable Securitization Receivable Interest-only strips, initial value Interest-only strips, initial value Interest-only strips, initial value Recorded investment in loans sold, including accrued interest Recorded investment in loans sold, including accrued interest Recorded investment in loans sold, including accrued interest Net gains Loans and Leases Receivable, Gain (Loss) on Sales, Net Consumer real estate non-accrual loans sold Financing Receivable, Significant Sales Balances of assets and liabilities measured at fair value on a recurring and non-recurring basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Tabular disclosure of the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset and liability Fair value, option, quantitative disclosures Fair Value, Option, Quantitative Disclosures [Table Text Block] Fair value of assets and liabilities, including hierarchy level Fair Value, by Balance Sheet Grouping [Table Text Block] Securities Available for Sale and Interest-Only Strips Net Investment Hedges Foreign Currency Translation Adjustment Recognized Postretirement Prior Service Cost Changes in accumulated other comprehensive income by component Other Comprehensive Income (Loss) Net of Tax, Period Change [Abstract] Comprehensive income at the beginning of the period Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Amounts reclassified from accumulated other comprehensive income (loss) Comprehensive income at the end of the period Business Segments Segment Reporting Disclosure [Text Block] Summary of components of other comprehensive income and the related tax effects Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Schedule of accumulated other comprehensive income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Cash and Due from Banks Cash and Cash Equivalents Disclosure [Text Block] Receivables Acquired with Deteriorated Credit Quality [Axis] Receivables Acquired with Deteriorated Credit Quality [Axis] Receivables Acquired with Deteriorated Credit Quality [Domain] Receivables Acquired with Deteriorated Credit Quality [Domain] Receivables Acquired with Deteriorated Credit Quality Receivables Acquired with Deteriorated Credit Quality [Member] Allowance for loan and lease losses: Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Total Loans and leases outstanding: Loans and Leases Receivable, Net of Deferred Income [Abstract] Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Loans acquired with deteriorated credit quality Financing Receivable, Net Computation of basic and diluted earnings per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Stock Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Federal Home Loan Bank advances Federal Home Loan Bank Advances [Member] Subordinated bank notes Subordinated Debt [Member] Discounted lease rentals Discounted Lease Rentals [Member] This element represents the lease rentals, which are discounted to their current value using specific discounting rate. Other long-term borrowings Other Long Term Debt [Member] Represents other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer. Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Maturity Year 2017 Maturity Year 2017 [Member] This element represents the maturity year of long-term debt that will mature in 2017. Maturity Year 2018 Maturity Year 2018 [Member] This element represents the maturity year of long-term debt that will mature in 2018. Maturity Year 2019 Maturity Year 2019 [Member] This element represents the maturity year of long-term debt that will mature in 2019. Maturity Year 2020 Maturity Year 2020 [Member] Maturity Year 2020 [Member] Maturity Year 2021 Maturity Year 2021 [Member] Maturity Year 2021 [Member] Maturity Year 2022 Maturity Year 2022 [Member] This element represents the maturity year of long-term debt that will mature in 2022. Maturity Year 2025 Maturity Year 2025 [Member] Maturity Year 2025 [Member] Maturity Year 2025, Interest Rate Swap Maturity Year 2025, Interest Rate Swap [Member] Maturity Year 2025, Interest Rate Swap [Member] Minimum Minimum [Member] Federal Home Loan Bank, Advances, Option [Axis] Federal Home Loan Bank, Advances, Option [Axis] Federal Home Loan Bank, Advances, Option [Domain] Federal Home Loan Bank, Advances, Option [Domain] Federal Home Loan Bank advances Federal Home Loan Bank, Advances, Callable Option [Member] Debt instrument Debt Instrument [Line Items] Long-term borrowings Long-term Debt Stated Rate Debt Instrument, Interest Rate, Stated Percentage Loans pledged as collateral Loans Pledged as Collateral FHLB advances, amount prepayable Long-term Federal Home Loan Bank Advances Securities Available for Sale and Securities Held to Maturity Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Omnibus Incentive Plan tcb_Omnibus Incentive Plan [Member] tcb_Omnibus Incentive Plan [Member] Incentive Stock Program tcb_Incentive Stock Program [Member] tcb_Incentive Stock Program Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Awards (RSAs) Restricted Stock [Member] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Restricted Stock Awards and Restricted Stock Units Restricted Stock Awards and Restricted Stock Units [Member] Restricted Stock Awards and Restricted Stock Units [Member] Stock Options Employee Stock Option [Member] Share-based compensation Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Outstanding number of shares to vest only if certain return on asset goals, and service conditions are achieved (in shares) Share Based Compensation Arrangement by Share Based Payment Award Number of Shares to Vest upon Achievements of Certain Goals Represents the number of shares that will vest upon achievement of certain goals under the equity-based compensation plan. Unrecognized stock compensation expense for restricted stock awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average remaining amortization period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Restricted stock units, grants in period (in shares) Restricted Stock Units, Grants In Period The number of RSU grants made to date at the period end. Restricted stock, maximum multiplier Share-based Compensation Arrangement by Share-based Payment Award, Maximum Multiplier Percentage Share-based Compensation Arrangement by Share-based Payment Award, Maximum Multiplier Restricted stock units vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Remaining weighted-average performance period for RSUs Share-based Compensation Arrangement by Share-based Payment Award, Remaining Performance Period The remaining period of time in which performance goals must be met in order for the awards to vest. Compensation expense Allocated Share-based Compensation Expense Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Measurement of fair value on a recurring basis Fair Value, Measurements, Recurring [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Interest-only strips Interest-Only-Strip [Member] Forward loan sales commitments Forward Contracts [Member] Other contracts Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] [Line Items] for Fair Value, Assets and Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Net income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Originations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Principal paydowns / settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Ending balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Beginning balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Net income Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Other comprehensive income (loss) Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) Sales Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales Originations Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases Principal paydowns / settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements Ending balance Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Provision for deferred income taxes Deferred Income Tax Expense (Benefit) Proceeds from sales of loans and leases held for sale Proceeds From Sale Of Loans And Leases Held For Sale Proceeds From Sale Of Loans And Leases Held For Sale Originations of loans and leases held for sale, net of repayments Payments For Origination And Purchases of Loans and Leases Held for Sale The aggregate amount of cash outflow for loans and leases purchased and created with the intention to resell them in the near future. Gains on sales of assets, net Gain (Loss) on Disposition of Assets Net change in other assets and accrued expenses and other liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Other, net Other Noncash Income (Expense) Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Proceeds from maturities of and principal collected on securities Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Purchases of securities Payments to Acquire Available-for-sale Securities Redemption of Federal Home Loan Bank stock Proceeds from Sale of Federal Reserve Bank Stock Purchases of Federal Home Loan Bank stock Payments to Acquire Federal Reserve Bank Stock Proceeds from sales of loans and leases Proceeds from Sale of Loans and Leases Held-for-investment Loan and lease originations and purchases, net of principal collected on loans and leases Payments for (Proceeds from) Loans and Leases Acquisition of Equipment Financing & Leasing Corporation, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sales of lease equipment ProceedsFromSaleOfLeasedEquipment ProceedsFromSaleOfLeasedEquipment Purchases of lease equipment Payments to Acquire Equipment on Lease Proceeds from sales of real estate owned Proceeds from Sale of Foreclosed Assets Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Other, net Payments for (Proceeds from) Other Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net change in deposits Increase (Decrease) in Deposits Net change in short-term borrowings Proceeds from (Repayments of) Short-term Debt Proceeds from long-term borrowings Proceeds from Issuance of Long-term Debt Payments on long-term borrowings Repayments of Long-term Debt Net investment by (distribution to) non-controlling interest Proceeds from (Payments to) Noncontrolling Interests Dividends paid on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Dividends paid on common stock Payments of Ordinary Dividends, Common Stock Stock compensation tax (expense) benefit Excess Tax Benefit from Share-based Compensation, Financing Activities Common shares sold to TCF employee benefit plans Proceeds from Stock Plans Exercise of stock options Proceeds from Stock Options Exercised Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and due from banks Net Cash Provided by (Used in) Continuing Operations Cash and due from banks at beginning of period Cash and Due from Banks Cash and due from banks at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid (received) for: Supplemental Cash Flow Information Cash Paid Received [Abstract] [Abstract] Supplemental Cash Flow Information Cash Paid Received [Abstract] [Abstract] Interest on deposits and borrowings Interest Paid, Net Income taxes, net Income Taxes Paid, Net Transfer of loans to other assets Transfer of Loans and Leases to Other Assets Transfer of value of loans and leases held in the entity's portfolio to Other Assets. Transfer of loans and leases from held for investment to held for sale, net Transfer Of Loans And Leases Held For Sale To From Portfolio Loans And Leases Net Net value of loans and leases held-for sale transferred to (from) loans and leases held in the entity's portfolio in noncash transactions. Income Statement [Abstract] Interest income: Interest and Dividend Income, Operating [Abstract] Loans and leases Interest and Fee Income, Loans and Leases Securities available for sale Securities held to maturity Interest Income, Securities, Operating, Held-to-maturity Loans held for sale and other Other Interest and Dividend Income Total interest income Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Deposits Interest Expense, Deposits Borrowings Interest Expense, Borrowings Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Non-interest income: Noninterest Income [Abstract] Fees and service charges Fees and Commissions, Depositor Accounts Card revenue Fees and Commissions, Debit Cards ATM revenue Fees and Commissions ATM Revenue Income earned from transactions and services related to ATM cards. Subtotal Fees and Commissions Gains on sales of auto loans, net Gain (Loss) on Sales of Loans, Net Gains on sales of consumer real estate loans, net Gain (Loss) on Sales of Consumer Loans Servicing fee income Bank Servicing Fees Subtotal Gain (Loss) on Disposition of Assets for Financial Service Operations, Including Bank Servicing Fees Gain (Loss) on Disposition of Assets for Financial Service Operations, Including Bank Servicing Fees Leasing and equipment finance Leases and Equipment Finance Income The total amount of revenue recognized for the period from operating, sales-type, financing and other leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. Other Noninterest Income, Other Operating Income Fees and other revenue Fees and Other Revenue Aggregate of fees and other revenue excluding gain (loss) on sale of securities. Gains (losses) on securities, net Gain (Loss) on Sale of Securities Including Other than Temporary Impairment, Net The net gain or loss realized from the sale, exchange, redemption, retirement and other than temporary impairment charges of securities. Total non-interest income Noninterest Income Non-interest expense: Noninterest Expense [Abstract] Compensation and employee benefits Labor and Related Expense Occupancy and equipment Occupancy, Net Other Subtotal Noninterest Expense Excluding Other Expenses Total aggregate amount of all noninterest expense excluding operating lease depreciation, foreclosed real estate and repossessed assets, net expense and other credit costs, net. Operating lease depreciation Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease Foreclosed real estate and repossessed assets, net Foreclosed Real Estate and Repossessed Assets Expense Amount of expense recognized during the period for the foreclosure on real estate assets and repossessed equipment. Other credit costs, net Other Credit Costs, Net Amount of consumer real estate loan pool insurance, write-downs on residual values of operating leases and reserve requirements for expected losses on unfunded commitments. Total non-interest expense Noninterest Expense Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Income after income tax expense Income attributable to non-controlling interest Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Nonredeemable Net income attributable to TCF Financial Corporation Preferred stock dividends Preferred Stock Dividends, Income Statement Impact Net income available to common stockholders Net income per common share: Basic (in dollars per share) Diluted (in dollars per share) Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement of fair value on a non-recurring basis Fair Value, Measurements, Nonrecurring [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fixed-rate subordinated notes, Face amount Debt Instrument, Face Amount Other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Repossessed and returned assets at carrying value Repossessed and Returned Equipment at Carrying Value Represents the carrying value of repossessed and returned equipment. OREO and repossessed assets, written down Asset Impairment Charges Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Enterprise Services Enterprise Services [Member] Enterprise Services [Member] Segment Reporting Information Segment Reporting Information [Line Items] Net interest income Non-interest income Non-interest expense Income tax expense (benefit) Preferred stock dividends Dividends, Preferred Stock, Cash Total assets Assets Revenues from external customers: Segment Reporting Information, Revenue for Reportable Segment [Abstract] Interest income Non-interest income Noninterest Income after Intersegment Eliminations This element represents the total amount of noninterest income after intersegment eliminations which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. Total Revenues Restricted Stock Awards, Shares Activity Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited/cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Vested (in shares) Outstanding at the end of the period (in shares) Restricted Stock Awards, Grant Date Fair Value Range Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Grant Date Fair Value [Roll Forward] Grant Date Fair Value, Outstanding at the beginning (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Grant Date Fair Value Grant Date Fair Value, Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value Grant Date Fair Value, Forfeited/canceled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Grant Date Fair Value Grant Date Fair Value, Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Grant Date Fair Value Grant Date Fair Value, Outstanding at the end (in dollars per share) Restricted Stock Awards, Weighted-Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted-Average Grant Date Fair Value, Outstanding at the beginning (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Forfeited/cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value, Outstanding at the end (in dollars per share) Stock options, shares activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited/canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Outstanding at the end of the period (in shares) Stock Options, Weighted-Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term [Abstract] Weighted- Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Exercise Price Share Based Compensation Arrangement by Share Based Payment Award, Options Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price, Outstanding at the beginning (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Forfeited/canceled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Weighted-Average Exercise Price, Outstanding at the end (in dollars per share) Stock options outstanding and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Stock Options Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Fair Value Disclosures Fair Value Disclosures [Text Block] Assets: Assets [Abstract] Cash and due from banks Investments Other Investments Securities available for sale Loans and leases held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans and leases: Loans and Leases Receivable, Net Amount [Abstract] Consumer real estate: Loans and Leases Receivable, Gross, Consumer, Real Estate [Abstract] First mortgage lien Loans and Leases Receivable Consumer First Mortgage Lien This element represents consumer real estate loans secured by a first mortgage lien position. Junior lien Loans and Leases Receivable Consumer Junior Lien This element represents consumer real estate loans secured by a junior lien position. Total consumer real estate Commercial Loans Receivable, Gross, Commercial, Financial and Agricultural Leasing and equipment finance Leases Receivable Commercial Lease and Equipment Financing Reflects the net carrying amount of commercial loans (money lent to commercial entities rather than consumers) made in the form of direct financing and equipment leases where the reporting entity (lessor) only recognizes interest revenue from the lease. Allowance for loan and lease losses Net loans and leases Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Other assets Other Assets Total assets Liabilities and Equity: Liabilities and Equity [Abstract] Deposits: Deposits [Abstract] Checking Demand Deposit Accounts Savings Deposits, Savings Deposits Money market Deposits, Money Market Deposits Certificates of deposit Time Deposits Total deposits Deposits Short-term borrowings Short-term Debt Total borrowings Debt and Capital Lease Obligations Accrued expenses and other liabilities Other Liabilities Total liabilities Liabilities Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, par value $0.01 per share, 30,000,000 shares authorized; 4,006,900 issued Preferred Stock, Value, Issued Common stock, par value $0.01 per share, 280,000,000 shares authorized; 171,532,487 and 171,034,506 shares issued, respectively Common Stock, Value, Issued Additional paid-in capital