Fair Value Disclosures [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurements, Nonrecurring Fair Value Measurements, Nonrecurring [Table Text Block] Increases and Decreases in Value of Certain Assets Measured at Fair Value on Nonrecurring Basis Increases and Decreases in Value of Certain Assets Measured at Fair Value on Nonrecurring Basis [Table Text Block] Increases and Decreases in Value of Certain Assets Measured at Fair Value on Nonrecurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, Option, Quantitative Disclosures Fair Value, Option, Quantitative Disclosures [Table Text Block] Investments, Debt and Equity Securities [Abstract] Amortized Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after 1 year but within 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after 5 years but within 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years or without Maturity Date, Amortized Cost Basis Amount of available-for-sale debt securities at cost, net of adjustments, maturing after the tenth fiscal year following the latest fiscal year or securities with no maturity date. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Total Available-for-sale Debt Securities, Amortized Cost Basis Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after 1 year but within 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after 5 years but within 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years or without Maturity Date, Fair Value Amount of available-for-sale debt securities at fair value maturing after the tenth fiscal year following the latest fiscal year or securities with no maturity date. Total Available-for-sale Securities, Debt Securities Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Santander Bank [Member] Subsidiaries [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 8.750% subordinated debentures, due May 2018 [Member] Subordinated Debt Due May 2018 [Member] Subordinated Debt Due May 2018 [Member] FHLB advances, maturing through August 2018 [Member] Federal Home Loan Bank Advances [Member] Subordinated term loan, due February 2019 [Member] Subordinated Term Loan, Due February 2019 [Member] Subordinated Term Loan, Due February 2019 [Member] REIT preferred, due May 2020 [Member] Issuance of Stock, Subsidiary [Member] Issuance of Stock, Subsidiary [Member] Subordinated term loan, due August 2022 [Member] Subordinated Term Loan, Due August 2022 [Member] Subordinated Term Loan, Due August 2022 [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Restructured FHLB Advances [Member] Restructured FHLB Advances [Member] Restructured FHLB Advances [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Subordinated debentures, Balance Subordinated Debt FHLB advances, maturing through August 2018, Balance Long-term Federal Home Loan Bank Advances Subordinated term loan, Balance Loans Payable REIT preferred, due May 2020, Balance Issuance of Stock, Subsidiary Issuance of Stock, Subsidiary Total borrowings and other debt obligations Borrowings and Other Debt Obligations Borrowings and other debt obligations. Effective Rate Debt Instrument, Interest Rate, Effective Percentage Stated Rate Debt Instrument, Interest Rate, Stated Percentage Debt maturity, extended term Debt Instrument, Maturity Period, Extension Debt Instrument, Maturity Period, Extension Statement of Comprehensive Income [Abstract] NET INCOME INCLUDING NONCONTROLLING INTEREST Net Income (Loss), Including Portion Attributable to Noncontrolling Interest OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAX Other Comprehensive Income (Loss), Net of Tax [Abstract] Net unrealized (losses)/gains on cash flow hedge derivative financial instruments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Net unrealized gains/(losses) on investment securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Pension and post-retirement actuarial gain Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax TOTAL OTHER COMPREHENSIVE (LOSS)/INCOME Other Comprehensive Income (Loss), Net of Tax COMPREHENSIVE INCOME/(LOSS) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest COMPREHENSIVE INCOME/(LOSS) ATTRIBUTABLE TO SHUSA Comprehensive Income (Loss), Net of Tax, Attributable to Parent Variable Interest Entity and Securitizations [Abstract] Variable Interest Entity and Securitizations [Abstract] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Summary of Cash Flows Received Schedule of Cash Flows Between Transferor and Transferee [Table Text Block] Schedule of Cash Flows Between Transferor and Transferee [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Residential mortgages [Member] Residential Mortgage [Member] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Loans held for investment, fair value Loans Receivable, Fair Value Disclosure Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Residential servicing rights at fair value Servicing Asset at Fair Value, Amount STOCKHOLDER'S EQUITY Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock, no par value (in usd per share) Preferred Stock, No Par Value Preferred Stock, liquidation preference per share (in usd per share) Preferred Stock, Liquidation Preference Per Share Preferred Stock, shares authorized Preferred Stock, Shares Authorized Preferred Stock, shares outstanding Preferred Stock, Shares Outstanding Common Stock, no par value (in usd per share) Common Stock, No Par Value Common Stock, shares authorized Common Stock, Shares Authorized Common Stock, shares outstanding Common Stock, Shares, Outstanding Related Party Transactions [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Transfers and Servicing [Abstract] Schedule of Other Assets Schedule of Other Assets [Table Text Block] Schedule of Servicing Assets at Fair Value Schedule of Servicing Assets at Fair Value [Table Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] SCUSA [Member] SCUSA [Member] SCUSA [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Combined Total Revenue, Net of Total Interest Expense [Member] Combined Total Revenue, Net of Total Interest Expense [Member] Combined Total Revenue, Net of Total Interest Expense [Member] Net Income (Loss) [Member] Net Income (Loss) [Member] Net Income (Loss) [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] SCUSA Amounts Included, Total Revenue, Net of Total Interest Expense Interest Income (Expense), Net SCUSA Amounts Included, Net Income Net Income (Loss) Attributable to Parent Supplemental Pro Forma, Total Revenue, Net of Total Interest Expense Business Combination, Pro Forma Interest Income (Expense), Net Business Combination, Pro Forma Interest Income (Expense), Net Supplemental Pro Forma, Net Income Business Acquisition, Pro Forma Net Income (Loss) Gain attributable to SCUSA shares sold Business Combination, Bargain Purchase, Gain Recognized, Amount Loans and Leases Receivable Disclosure [Abstract] Schedule of Loans Receivables [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] LTV of less than or equal to 80% [Member] LTV of less than or equal to 80% [Member] LTV of less than or equal to 80% [Member] LTV of 80.01% to 90% [Member] LTV of 80.01% to 90% [Member] LTV of 80.01% to 90% [Member] LTV of 90.01% to 100% [Member] LTV of 90.01% to 100% [Member] LTV of 90.01% to 100% [Member] LTV of 100.01% to 120% [Member] LTV of 100.01% to 120% [Member] LTV of 100.01% to 120% [Member] LTV of 120.01% to 140% [Member] LTV of 120.01% to 140% [Member] LTV of 120.01% to 140% [Member] LTV greater than 140% [Member] LTV greater than 140% [Member] LTV greater than 140% [Member] LTV not applicable [Member] LTV not applicable [Member] LTV not applicable [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Home mortgages [Member] Home Mortgages [Member] Home Mortgages [Member] Self-originated home equity [Member] Self Originated Home Equity [Member] Self Originated Home Equity [Member] Loans Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Financing receivable Financing Receivable, Including Receivable Held-for-sale, Gross The balance of financing receivables including loans held-for-sale, before allowance for credit losses. Percentage of total home mortgages Loans and Leases Receivable, Percentage of Total Loans, Home Mortgages Loans and Leases Receivable, Percentage of Total Loans, Home Mortgages Percentage of total self-originated home equity loans Loans and Leases Receivable, Percentage of Total Loans, Self-originated Home Equity Loans and Leases Receivable, Percentage of Total Loans, Self-originated Home Equity Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Liability Pledged [Axis] Liability Pledged [Axis] Liability for which Investments are pledged [Axis] Liabilities Pledged [Domain] Liabilities Pledged [Domain] Liabilities pledged for collateral Public fund deposits [Member] Public Fund Deposits [Member] Public Fund Deposits [Member] Repurchase agreements, hedging activities and recourse on loan sales [Member] Repurchase Agreements and Hedging Activities [Member] Repurchase Agreements and Hedging Activities [Member] Overnight customer deposits [Member] Overnight Customer Deposits [Member] Overnight Customer Deposits [Member] Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Securities pledged as collateral, fair value Security Owned and Pledged as Collateral, Fair Value Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Retail Banking [Member] Retail Banking [Member] Retail Banking [Member] Investment Services [Member] Investment Services [Member] Investment Services [Member] Auto Finance & Alliances [Member] Auto Finance and Alliances [Member] Auto Finance and Alliances [Member] Real Estate and Commercial Banking [Member] Real Estate and Commercial Banking [Member] Real Estate and Commercial Banking [Member] Specialty & Government Banking [Member] Specialty and Government [Member] Specialty and Government [Member] Global Banking & Markets and Large Corporate [Member] Global Banking [Member] Global Banking [Member] Goodwill [Line Items] Goodwill [Line Items] Number of branches sold Number of Branches Sold Number of Branches Sold Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, Beginning balance Goodwill Disposals during the period Goodwill, Written off Related to Sale of Business Unit Additions during the period Goodwill, Acquired During Period Re-allocations during the period Goodwill, Transfers Goodwill, Ending balance Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table] Fair Value Inputs, Assets and Liabilities, Quantitative Information Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Financing bonds [Member] Bonds [Member] Sale-lease back securities [Member] Sale-Leaseback Securities [Member] Sale-Leaseback Securities [Member] Retail installment contracts held for investment [Member] Retail Installment Contracts Held-for-investment [Member] Retail Installment Contracts Held-for-investment [Member] Mortgage servicing rights [Member] Servicing Assets [Member] Servicing assets Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Mortgage banking interest rate lock commitments [Member] Interest Rate Lock Commitments [Member] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Consensus Pricing [Member] Consensus Pricing [Member] Fair value estimates that are generally internally developed using information such as dealer quotes or other third-party provided valuations or comparable asset prices. Discounted Cash Flow [Member] Discounted Cash Flow [Member] Discounted Cash Flow Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Weighted average [Member] Weighted Average [Member] Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Assets and LIabilities, Quantitative Information [Line Items] Fair Value Inputs, Assets and LIabilities, Quantitative Information Financing bonds Held-to-maturity Securities, Fair Value Available-for-sale at fair value Available-for-sale Securities Retail installment contracts held for investment Mortgage servicing rights Derivative assets at fair value Derivative Asset Fair Value Inputs [Abstract] Fair Value Inputs [Abstract] Discount rate Fair Value Inputs, Discount Rate Offered quotes Fair Value Inputs, Offered Quotes as Percentage of Face Value Price at which a dealer is willing to buy an instrument, used as an input to measure fair value. ABS Fair Value Inputs, ABS Rate Fair Value Inputs, ABS Rate Prepayment rate (CPR) Fair Value Inputs, Prepayment Rate Recovery rate Fair Value Inputs, Recovery Rate Fair Value Inputs, Recovery Rate Pull through percentage Fair Value Inputs, Pull-through Rate Fair Value Inputs, Pull-through Rate MSR value Fair Value Inputs, Mortgage Servicing Right Value Estimated value of the servicing right embedded in the underlying loan, expressed in basis points of outstanding unpaid principal balance Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [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] State and municipal securities [Member] Municipal Bonds [Member] Corporate debt securities [Member] Corporate Debt Securities [Member] MBS [Member] Collateralized Mortgage Backed Securities [Member] Collateralized mortgage obligations [Member] Collateralized Mortgage Obligations [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract] Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract] Proceeds from the sales of available-for-sale securities Proceeds from Sale of Available-for-sale Securities Gross realized gains Investment Securities, Gross Realized Gains Investment Securities, Gross Realized Gains Gross realized losses Investment Securities, Gross Realized Losses Investment Securities, Gross Realized Losses OTTI Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net Net realized gains/(losses) Available-for-sale Securities, Gross Realized Gain (Loss) Investment securities sold during the period Investment Securities Sold During Period Investment Securities Sold During Period Realized investment gain Realized Investment Gains (Losses) Commitments and Contingencies Disclosure [Abstract] Representation and Warranty Reserve [Roll Forward] Representation and Warranty Reserve [Roll Forward] Representation and Warranty Reserve [Roll Forward] Beginning Balance Representation and warranty reserve Represents the reserve for the expected losses related to loans sold into the secondary mortgage market that may be required to repurchase, includes both estimate of expected losses and adjustments to previous estimates of expected losses. Additions Representation and Warranty Reserve, Addition, Provision The amount represents the increase in the representation and warranty reserve due to change in estimate of expected mortgage loan repurchase losses for the previously sold loans. Reductions Representation and Warranty Reserve, Reduction, Charge-offs The charge-offs represent the actual loss incurred upon completion of processing approved repurchase where the Company has agreed to repurchase the loan and/or indemnify the investor. Ending Balance BORROWINGS Debt Disclosure [Text Block] Cash and amounts due from depository institutions Cash and Due from Banks Investment securities: Investments [Abstract] Trading securities Trading Securities Other investments Other Investments Loans held for investment Loans and Leases Receivable, Net of Deferred Income Allowance for loan losses Loans and Leases Receivable, Allowance Net loans held for investment Loans and Leases Receivable, Net Amount Loans held-for-sale at fair value Loans Receivable Held-for-sale, Net Premises and equipment, net Property, Plant and Equipment, Net Accrued interest receivable Interest Receivable Equity method investments Equity Method Investments Goodwill Core deposit intangibles and other intangibles, net Intangible Assets, Net (Excluding Goodwill) Leased vehicles, net Property Subject to or Available for Operating Lease, Net Bank owned life insurance Bank Owned Life Insurance Restricted cash Restricted Cash and Cash Equivalents Deferred tax assets, net Deferred Tax Assets, Net Other assets Other Assets TOTAL ASSETS Assets LIABILITIES Liabilities [Abstract] Accrued expenses and payables Accounts Payable, Accrued Liabilities and Pension Liabilities Accounts Payable, Accrued Liabilities and Pension Liabilities Total deposits and other customer accounts Deposits Borrowings and other debt obligations Advance payments by borrowers for taxes and insurance Advance Payments by Borrowers for Taxes and Insurance Deferred tax liabilities, net Deferred Tax Liabilities, Net Other liabilities Other Liabilities TOTAL LIABILITIES Liabilities Preferred stock (no par value; $25,000 liquidation preference; 7,500,000 shares authorized; 8,000 shares outstanding at June 30, 2014 and at December 31, 2013) Preferred Stock, Value, Issued Common stock (no par value; 800,000,000 shares authorized; 530,391,043 and 520,307,043 shares outstanding at June 30, 2014 and at December 31, 2013, respectively) Common Stock, Value, Issued Accumulated other comprehensive (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) TOTAL SHUSA STOCKHOLDER'S EQUITY Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest TOTAL STOCKHOLDER'S EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY Liabilities and Equity Segment Reporting [Abstract] BUSINESS SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] FAIR VALUE Fair Value Disclosures [Text Block] Income Tax Disclosure [Abstract] Income tax provision Income Tax Expense (Benefit) Effective tax rate Effective Income Tax Rate Reconciliation, Percent Number of financing transactions related to lawsuit Number of Transactions Related to Lawsuit Seeking Refund of Taxes Paid Number of Transactions Related to Lawsuit Seeking Refund of Taxes Paid Transaction amount related to lawsuit seeking refund of taxes paid Transaction Amount Related to Lawsuit Seeking Refund of Taxes Paid Transaction Amount Related to Lawsuit Seeking Refund of Taxes Paid Foreign taxes paid Income Taxes Paid Disallowed interest expense and transaction costs deductions Disallowed Interest Expense and Transaction Costs Deductions Disallowed Interest Expense and Transaction Costs Deductions Penalties and interest expense Income Tax Examination, Penalties and Interest Expense Tax reserve Income Tax Examination, Penalties and Interest Accrued Reasonably possible decrease in reserve for uncertain tax positions Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound Reasonably possible increase in reserve for uncertain tax positions Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound Maximum potential liability resulting from recharacteriazation of ordinary losses Income Tax Examination Recharacterization of Ordinary Gains Income Tax Examination Recharacterization of Ordinary Gains Potential interest owed resulting from the recharacterization adjustment of ordinary losses to capital losses Potential interest owed resulting from the recharacterization adjustment of ordinary losses to capital losses Potential interest owed resulting from the recharacterization adjustment of ordinary losses to capital losses Potential penalties owed resulting from the recharacterization adjustment of ordinary losses to capital losses Potential penalties owed resulting from the recharacterization adjustment of ordinary losses to capital losses Potential penalties owed resulting from the recharacterization adjustment of ordinary losses to capital losses Fair Value Measusrments, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Nonrecurring [Member] Fair Value, Measurements, Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) [Member] Fair Value [Member] Estimate of Fair Value Measurement [Member] Impaired loans held for investment [Member] Impaired Loans Held for Investment [Member] Impaired Loans Held for Investment [Member] Foreclosed assets [Member] Foreclosed Assets [Member] Foreclosed Assets [Member] Repossessed vehicle inventory [Member] Repossessed Vehicle Inventory [Member] Repossessed Vehicle Inventory [Member] Provision for credit losses [Member] Provision for Loan and Lease Losses [Member] Provision for loan and lease losses Other administrative expense [Member] Other Expense [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] Impaired loans held for investment Impaired Loans Measured at Fair Value Impaired Loans Measured at Fair Value Foreclosed assets Foreclosed Assets Measured at Fair Value Foreclosed Assets Measured at Fair Value Repossessed vehicle inventory Repossessed Vehicle Inventory, Fair Value Disclosure Repossessed Vehicle Inventory, Fair Value Disclosure Total carrying value of the loans Impaired Financing Receivable, Recorded Investment Fair value adjustment Assets, Fair Value Adjustment Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Cross currency swaps [Member] Currency Swap [Member] Interest rate swaps [Member] Interest Rate Swap [Member] Forward commitments to sell loans [Member] Forward Commitments to Sell Loans [Member] Forward commitments to sell loans Interest rate lock commitments [Member] Mortgage servicing rghts [Member] Mortgage Servicing Rights [Member] Mortgage Servicing Rights [Member] Customer related derivatives [Member] Customer related derivatives [Member] Customer related derivatives [Member] Foreign exchange [Member] Foreign Exchange Contract [Member] SCUSA derivatives [Member] SCUSA Derivatives [Member] SCUSA Derivatives [Member] Other [Member] Other Contract [Member] Miscellaneous income [Member] Miscellaneous Income [Member] Miscellaneous Income Net interest income [Member] Net Interest Income [Member] Net Interest Income Mortgage banking income [Member] Mortgage Banking Income [Member] Mortgage Banking Income Non-interest income [Member] Non-interest Income [Member] Non-interest Income [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair value hedges [Member] Fair Value Hedging [Member] Cash flow hedges [Member] Cash Flow Hedging [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Gain (loss) recognized on all derivatives Derivative, Gain (Loss) on Derivative, Net Retail installment contracts and auto loans [Member] Consumer Loans Auto Financing Receivable [Member] Personal unsecured loans [Member] Personal Unsecured Loan [Member] Personal Unsecured Loan [Member] Home equity loans and lines of credit [Member] Home Equity Line of Credit [Member] FICO score less than 600 [Member] FICO Score Less than 600 [Member] FICO Score Less than 600 [Member] FICO score of 600 to 639 [Member] FICO Score of 600 to 639 [Member] FICO Score of 600 to 639 [Member] FICO score of 640 to 679 [Member] FICO Score of 640 to 679 [Member] FICO Score of 640 to 679 [Member] FICO score of 680 to 719 [Member] FICO Score of 680 to 719 [Member] FICO Score of 680 to 719 [Member] FICO score of 720 to 759 [Member] FICO Score of 720 to 759 [Member] FICO Score of 720 to 759 [Member] FICO score equal to or greater than 760 [Member] FICO Score Equal to or Greater than 760 [Member] FICO Score Equal to or Greater than 760 [Member] FICO score not refreshed [Member] FICO score not refreshed [Member] FICO score not refreshed [Member] Financing receivable Percentage of total loans, Retail installment contracts and auto loans Percentage of Total Loans, Retail Installment Contracts and Auto Loans Percentage of Total Loans, Retail Installment Contracts and Auto Loans Percentage of total loans, Personal unsecured loans balance Percentage of Total Loans, Personal Unsecured Loans Percentage of Total Loans, Personal Unsecured Loans Percentage of total loans, Home equity loans and lines Percentage of Total Loans, Home Equity Loans and Lines Percentage of Total Loans, Home Equity Loans and Lines Loan, Type [Axis] Loan, Type [Axis] Loan, Type [Axis] Loan, Type [Domain] Loan, Type [Domain] [Domain] for Loan, Type [Axis] Commercial Loans Held for Investment [Member] Commercial Loans Held for Investment [Member] Commercial Loans Held for Investment [Member] Loans Held-for-investment [Member] Loans Held-for-investment [Member] Loans Held-for-investment [Member] Corporate banking [Member] Corporate Banking Commercial Loans [Member] Corporate Banking Commercial Loans [Member] Middle market commercial real estate [Member] Middle Market Commercial Real Estate Loans [Member] Middle Market Commercial Real Estate Loans Santander real estate capital [Member] Santander Real Estate Capital [Member] Santander Real Estate Capital [Member] Consumer loans not secured by real estate [Member] Consumer Loans Not Secured by Real Estate [Member] Consumer Loans Not Secured by Real Estate Commercial real estate loans [Member] Commercial Real Estate Loans [Member] Commercial Real Estate Loans [Member] Commercial and industrial loans [Member] Commercial and Industrial Loans [Member] Commercial and Industrial Loans [Member] Multi-family loans [Member] Multi-Family Commercial Loans [Member] Multi-Family Commercial Loans [Member] Other commercial [Member] Other Commercial Loans [Member] Other commercial loans that do not meet the claasification of commercial real estate, commercial and industrial and multi-family commercial loans.[Member] Consumer loans secured by real estate [Member] Consumer Loans Secured by Real Estate [Member] Consumer loans secured by real estate, including residential mortgages and home equity lines of credit. [Member] Personal unsecured loan [Member] Other consumer [Member] Consumer Other Financing Receivable [Member] Retail installment contracts and auto loans [Member] Retail Installment Contracts and Auto Loans [Member] Retail Installment Contracts and Auto Loans [Member] Financing receivable Financing Receivable, Gross Loans held for sale Loans Held-for-sale, Fair Value Disclosure Level 1 [Member] Level 2 [Member] Assets Assets, Fair Value Disclosure Percentage of level 3 assets to total assets held at fair value Percentage of Level 3 Assets to Total Assets Held at Fair Value Percentage of Level 3 assets to total assets held at fair value Percentage of level 3 assets to total assets Percentage of Level 3 Assets to Total Assets Percentage of Level 3 Assets to Total Assets Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Preferred Stock [Member] Preferred Stock [Member] Accumulated Other Comprehensive Income/(Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, shares Beginning balance Comprehensive income/(loss) SCUSA Change in Control Equity Method Investments, Income (Loss) from Change in Control Equity Method Investments, Income (Loss) from Change in Control Issuance of common stock, shares Stock Issued During Period, Shares, New Issues Issuance of common stock Stock Issued During Period, Value, New Issues Stock issued in connection with employee benefit and incentive compensation plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Dividends paid on preferred stock Dividends, Preferred Stock, Cash Ending balance, shares Ending balance Schedule of Servicing Assets [Table] Schedule of Servicing Assets [Table] Activity in the balance of servicing assets subsequent measured at either fair value or amortized costs. Purchaser, Name [Axis] Purchaser, Name [Axis] Purchaser, Name Purchaser, Name [Domain] Purchaser, Name [Domain] [Domain] for Purchaser, Name FNMA [Member] Federal National Mortgage Association [Member] Federal National Mortgage Association or Fannie Mae (FNMA) Commitments, Type [Axis] Commitments, Type [Axis] Commitments, type Commitments, Type [Domain] Commitments, Type [Domain] Commitments, type Loans sold with recourse and credit enhancement features [Member] Loans Receivable Sold with Recourse [Member] Loans receivable sold with recourse Servicing Assets [Line Items] Servicing Assets [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. Principal balance of loans serviced for others Loans Serviced for Others, Principal Balance Principal balance of loans serviced for others Carrying value of MSRs based on the fair value option Servicing Asset at Amortized Cost Net changes in the fair value of MSRs Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions Loans sold with recourse, unpaid principal balance Loans Sold with Recourse, Unpaid Principal Balance Unpaid principal balance of loans sold with recourse at period end. Repurchase amount of loans Loans Sold with Recourse, Repurchase Amount Loans Sold with Recourse, Repurchase Amount Servicing Fees [Abstract] Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets [Abstract] Mortgage servicing fee income Bank Servicing Fees Gains (losses) on sale of mortgage loans Gain (Loss) on Sale of Mortgage Loans Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Commercial Banking [Member] Commercial and Large Corporate Banking [Member] Commercial and Large Corporate Banking [Member] Global Banking & Markets [Member] Other [Member] Other Segments [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Purchase Price Adjustments [Member] Segment Reconciling Items [Member] Eliminations [Member] Consolidation, Eliminations [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Minimum annual revenue to service corporations Minimum Annual Revenue to Service Corporation Minimum Annual Revenue to Service Corporation Noncontrolling interest, ownership percentage by parent Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Net interest income Total non-interest income Noninterest Income Total non-interest income Fees and Other Income Including Realized Gains (Losses) on Sale of Investment Securities Fees and Other Income Including Realized Gains (Losses) on Sale of Investment Securities Gain on change in control Gain on Change in Control Gain on Change in Control Provision for credit losses Provision for Loan, Lease, and Other Losses Total expenses General and Administrative and Other Expenses General and administrative and other expenses Income/(loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Intersegment (expense)/revenue Revenues Total average assets Segment Reporting Information, Average Assets1 Amount of average assets attributed to the reportable segment. Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Commercial [Member] Commercial Portfolio Segment [Member] Commercial and industrial [Member] Multi-family [Member] Remaining commercial [Member] Consumer [Member] Consumer Portfolio Segment [Member] Other consumer [Member] Other Consumer Loans [Member] Other consumer loans, that does not meet the classification of consumer secured by real estate and automobile loans. [Member] Pass [Member] Pass [Member] Special mention [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Doubtful [Member] Doubtful [Member] Performing [Member] Performing Financing Receivable [Member] Nonperforming [Member] Nonperforming Financing Receivable [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Total loans BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Derivative [Table] Derivative [Table] Credit Downgrade Level [Axis] Credit Downgrade Level [Axis] Credit Downgrade Level [Axis] Credit Downgrade Level [Domain] Credit Downgrade Level [Domain] [Domain] for Credit Downgrade Level [Axis] One notch downgrade [Member] One notch downgrade [Member] One notch downgrade [Member] Two notch downgrade [Member] Two notch downgrade [Member] Two notch downgrade Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as hedging instrument [Member] Designated as Hedging Instrument [Member] Derivative [Line Items] Derivative [Line Items] Derivative, Credit Risk Related Contingent Features [Abstract] Derivative, Credit Risk Related Contingent Features [Abstract] Fair value of derivatives with credit risk contingent feature associated with credit ratings Derivative, Net Liability Position, Credit Downgrade, Aggregate Fair Value Fair value of derivatives with contingent features affected by the downgrade of credit rating of the entity. Additional collateral required Additional Collateral, Aggregate Fair Value Fair value of derivatives with credit risk contingent features Derivative, Net Liability Position, Aggregate Fair Value Collateral posted Collateral Already Posted, Aggregate Fair Value Summary of Fair Value Hedge Activity [Abstract] Summary of Fair Value Hedge Activity [Abstract] Deferred loss on discontinuation of fair value hedge Deferred (Gain) Loss on Discontinuation of Fair Value Hedge Amortization of deferred hedge gains Amortization of Deferred Hedge Gains Summary of Cash Flow Hedge Activity [Abstract] Summary of Cash Flow Hedge Activity [Abstract] Cash flow hedge loss to be reclassified within next twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Summary of Derivative Instruments [Abstract] Summary of Derivative Instruments [Abstract] Notional Amount Derivative, Notional Amount Fair value hedges, Asset Foreign Currency Fair Value Hedge Asset at Fair Value Cash flow hedges, Asset Interest Rate Cash Flow Hedge Asset at Fair Value Total, Asset Derivative Instruments in Hedges, Assets, at Fair Value Fair value hedges, Liability Foreign Currency Fair Value Hedge Liability at Fair Value Cash flow hedges, Liability Interest Rate Cash Flow Hedge Liability at Fair Value Total, Liability Derivative Instruments in Hedges, Liabilities, at Fair Value Weighted Average Receive Rate Derivative, Average Variable Interest Rate Weighted Average Pay Rate Derivative, Average Fixed Interest Rate Weighted Average Life (Years) Derivative, Average Remaining Maturity Available-for-sale securities to be sold and in unrealized loss position Available-for-sale Securities to be Sold and in Unrealized Loss Position Available-for-sale Securities to be Sold and in Unrealized Loss Position OTTI recognized in earnings Number of securities in unrealized loss position Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions New Accounting Pronouncements and Changes in Accounting Principles [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2013-11 [Member] Accounting Standards Update 2013-11 [Member] Accounting Standards Update 2013-11 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Reduction in deferred tax assets Valuation Allowance, Deferred Tax Asset, Change in Amount 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] Dealer networks [Member] Dealer Network [Member] Dealer Network [Member] Chrysler relationship [Member] Chrysler Relationship [Member] Chrysler Relationship [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trade name [Member] Trade Names [Member] Intangibles subject to amortization, Net Carrying Amount Finite-lived Intangible Assets Acquired Intangibles not subject to amortization, Net Carrying Amount Indefinite-lived Intangible Assets Acquired Total Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangibles subject to amortization, Weighted Average Amortization Period Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Noncontrolling interest [Member] Stock compensation expense [Member] Stock Compensation Expense [Member] Stock Compensation Expense [Member] Fair value of noncontrolling interest in SCUSA Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Fair value of SCUSA employee vested stock options Business Combination, Acquisition of Employee Stock Options, Fair Value Business Combination, Acquisition of Employee Stock Options, Fair Value Fair value of SHUSA remaining ownership interest in SCUSA Business Combinations, Acquisition of Post-IPO Ownership Interest in Acquiree Business Combinations, Acquisition of Post-IPO Ownership Interest in Acquiree Fair value of equity-related interests in SCUSA Business Combination, Equity Interest in Acquiree, Fair Value Business Combination, Equity Interest in Acquiree, Fair Value Recognized amounts of identifiable assets acquired and liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Restricted cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash Loan receivables - held for sale Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable Held-for-sale Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable Held-for-sale Loan receivables - retail installment contracts Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable Autos Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable Autos Loan receivables from dealers Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable from Dealers Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable from Dealers Loan receivables - unsecured Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Unsecured Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Unsecured Premises and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Leased vehicles, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Leased Vehicles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Leased Vehicles Intangibles Miscellaneous receivables and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Deferred tax asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Borrowings and other debt obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Accounts payable and accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable and Accrued Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable and Accrued Liabilities Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Goodwill Stock options awards outstanding, fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Stock compensation expense immediately recognized Allocated Share-based Compensation Expense Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block] Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of Business Acquisition, Gain on Change in Control Schedule of Business Acquisition, Gain on Change in Control [Table Text Block] Schedule of Business Acquisition, Gain on Change in Control [Table Text Block] Business Acquisition, Actual Financial Information and Pro Forma Information of Acquiree Business Acquisition, Actual Financial Information and Pro Forma Information of Acquiree [Table Text Block] Business Acquisition, Actual Financial Information and Pro Forma Information of Acquiree [Table Text Block] Schedule of Financing Receivable, Allowance for loan and lease losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Unallocated [Member] Unallocated Financing Receivables [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for Loan Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Allowance for loan losses, beginning of period Financing Receivable, Allowance for Credit Losses (Recovery of)/Provision for loan losses Provision for Loan and Lease Losses Charge-offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Charge-offs, net of recoveries Financing Receivable, Allowance for Credit Losses, Net Write-downs Net amount of direct write-downs and recoveries of financing receivables charged against the allowance. Allowance for loan losses, end of period Reserve for Unfunded Lending Commitments [Roll Forward] Reserve for Unfunded Commitments [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Reserve for unfunded lending commitments, beginning of period Reserve for Unfunded Commitments Reserve for unfunded loan commitments and letters of credit. (Release of)/ provision for unfunded lending commitments Net Change in Reserve for Unfunded Commitments Net change in reserve for unfunded commitments which is included in the provision for credit losses. Loss on unfunded lending commitments Gain (Loss) on Unfunded Commitments Gain (Loss) on Unfunded Commitments Reserve for unfunded lending commitments, end of period Total allowance for credit losses, end of period Financing Receivable, Allowance for Credit Losses and Reserve for Unfunded Commitments A valuation allowance for financing receivables that are expected to be uncollectible and reserve for unfunded lending commitments. Allowance for Credit Loss, Additional Information [Abstract] Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Ending balance, individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Ending balance, collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total financing receivables Ending balance, evaluated under the fair value option or lower of cost or fair value Loans Receivable Held-for-sale, Net, Fair Value Option Loans Receivable Held-for-sale, Net, Fair Value Option Ending balance, individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Financing receivables, ending balance, collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Borrowings repurchase Debt Instrument, Repurchase Amount Residential MSRs [Member] Servicing Asset at Amortized Value, Balance [Roll Forward] Servicing Asset at Amortized Cost, Balance [Roll Forward] Carrying value at beginning of period Mortgage servicing assets recognized Servicing Asset at Amortized Cost, Additions Principal reductions Servicing Asset at Amortized Value, Amortization and Other than Temporary Impairments Amount of expense charged against earnings for the periodic recognition of servicing assets relative to estimated net servicing income and adjustment made to the carrying value of servicing assets measured using the amortization method related to an other-than-temporary impairment, for example, due to a decrease in future servicing income or an increase in servicing costs. Change in fair value due to valuation assumptions Carrying value at end of period Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] US Treasury and government agency securities [Member] US Treasury and Government [Member] Corporate debt [Member] Asset-backed securities [Member] Asset-backed Securities [Member] Equity securities [Member] Equity Securities [Member] Mortgage backed securities [Member] Fair value [Member] Cash flow [Member] Customer related [Member] Mortgage servicing [Member] Interest rate cap agreements [Member] Interest Rate Cap [Member] Mortgage banking forward sell commitments [Member] Total return swap [Member] Total Return Swap [Member] Interest rate swap agreements [Member] Option for interest rate cap [Member] Option for Interest Rate Cap [Member] Option for Interest Rate Cap [Member] Financial assets: Assets, Fair Value Disclosure [Abstract] Available-for-sale investment securities Total financial assets Financial liabilities: Liabilities, Fair Value Disclosure [Abstract] Derivative liabilities Derivative Liability Total financial liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Loans held for investment Loans held for investment with fixed rate of interest Loans Receivable with Fixed Rates of Interest Loans held for investment with variable rate of interest Loans Receivable with Variable Rates of Interest Loans held for investment, percent of total loans Loans and Leases Receivable, Percentage of Total Loan Balance Represents the percentage of total loan balance. Loans held for investment with fixed rate of interest, percent of total loans Loans Receivable with Fixed Rates of Interest, Percentage of Total Loan Balance Loans receivable with fixed rates of Interest as a percentage of total loans held for investments portfolio. Loans held for investment with variable rate of interest, percent of total loans Loans Receivable with Variable Rates of Interest, Percentage of Total Loan Balance Loans receivable with variable rates of interest as a percentage of total loans held for investments portfolio. Loans held for investment, deferred income Loans and Leases Receivable, Deferred Income Fair value of loan receivables Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value Gross contractual amount of loan receivables Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Estimate of contractual cash flows not expected to be collected at acquisition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Interest Component Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Interest Component Mortgage-backed securities, U.S. government agencies [Member] Residential mortgage backed securities issued by other Goverment agencies [Member] Residential mortgage backed securities issued by Goverment agencies other than FNMA or FHLMC. [Member] Mortgage-backed securities, FHLMC and FNMA debt securities [Member] Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 12 months or longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Less than 12 months, Unrealized Losses Available-for-Sale Securities, Continuous Unrealized Loss Position Less Than 12 Months Aggregated Losses Accumulated in Investments Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities thta have been in a loss position for less than twelve months impacting Investments. 12 months or longer, Unrealized Losses Available-for-Sale Securities, Continuous Unrealized Loss Position 2 Months or Longer Aggregated Losses Accumulated in Investments Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale securities that have been in a loss position for twelve months or longer impacting Investments. Total, Unrealized Losses Available-for-Sale Securities, Gross Unrealized Loss Accumulated in Investments Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Troubled debt restructurings Financing Receivable, Modifications, Recorded Investment Trouble debt restructurings, number of contracts Financing Receivable, Modifications, Number of Modifications Number of financing receivables that have been modified by troubled debt restructurings. Trouble debt restructurings, pre-modification outstanding recorded investment Financing Receivable, Modifications, Recorded Investment Pre-Modification Amount of investment in financing receivables (before modification) modified by troubled debt restructurings. Trouble debt restructurings, post-modification outstanding recorded investment Financing Receivable, Modifications, Recorded Investment Post-Modification Amount of investment in financing receivables (after modification) modified by troubled debt restructurings. Trouble debt restructurings, subsequent default, number of contracts Financing Receivable, Modifications, Subsequent Default, Number of Contracts Trouble debt restructurings, subsequent default, recorded investment Financing Receivable, Modifications, Recorded Investment, Subsequent Default Financing Receivable, Modifications, Recorded Investment, Subsequent Default Commitments [Table] Commitments [Table] Commitments Commitments to extend credit [Member] Commitments to Extend Credit [Member] Unsecured revolving lines of credit [Member] Credit Card Line of Credit [Member] Credit Card Line of Credit [Member] Letters of credit [Member] Letter of Credit [Member] Recourse and credit enhancement exposure on sold loans [Member] Commitments to sell loans [Member] Loan Purchase Commitments [Member] Loan Purchase Commitments [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Effective Periods [Axis] Effective Periods [Axis] Effective Periods [Axis] Effective Periods [Domain] Effective Periods [Domain] [Domain] for Effective Periods [Axis] July 2014 to July 2015 [Member] January 2014 to July 2015 [Member] January 2014 to July 2015 [Member] January 2014 to July 2017 [Member] January 2014 to July 2017 [Member] January 2014 to July 2017 [Member] CBP [Member] Citizens Bank of Pennsylvania [Member] Citizens Bank of Pennsylvania [Member] Commitments [Line Items] Commitments [Line Items] Commitments One year or less Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Less than One Year Represents the amount committed expiring in next twelve months under commitments. Over 1 year to 3 years Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Over One Year to Three Years Represents amount committed expiring in the next two to three years under commitments. Over 3 years to 5 years Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Over Three Years to Five Years Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Over Three Years to Five Years Over 5 years Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Over Five Years Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability, Over Five Years Total commitments Commitments, Amount Committed Represents amount committed under commitments. Commitments, weighted average term Commitments, Weighted Average Term Weighted average term of commitment Value of underlying collateral Guarantor Obligations, Maximum Exposure, Undiscounted Reserve for unfunded lending commitments Line of credit outstanding Line of Credit Facility, Amount Outstanding Loans sold with recourse, portion of first credit loss position retained, percent Loans Sold with Recourse, Portion of First Credit Loss Position Retained, Percent Portion (in percent) of first credit loss position on loans sold with recourse retained. Retained credit risk, multifamily servicing Retained Credit Risk, Multifamily Servicing Retained Credit Risk, Multifamily Servicing Loans sold with recourse, maximum exposure Loans Sold with Recourse, Maximum Exposure Loans Sold with Recourse, Maximum Exposure Forward contracts maturity period (less than one year) Derivative, Maturity Period Derivative, Maturity Period SCUSA Commitments [Abstract] SCUSA Commitments [Abstract] SCUSA Commitments [Abstract] Letter of credit, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Letters of credit outstanding Letters of Credit Outstanding, Amount Loss-sharing payment percentage Profit (Loss) Sharing Payment, Percentage Profit (Loss) Sharing Payment, Percentage Loan purchase commitment amount Loan Purchase Commitment, Amount Loan Purchase Commitment, Amount Loan purchase commitment, as a percentage of lending entity's near-prime originations Loan Purchase Commitment, Percentage of Lending Entity's Near-Prime Originations Loan Purchase Commitment, Percentage of Lending Entity's Near-Prime Originations Loan purchase commitment, cancellation pPeriod Loan Purchase Commitment, Cancellation Period Loan Purchase Commitment, Cancellation Period RECENT ACCOUNTING DEVELOPMENTS New Accounting Pronouncements and Changes in Accounting Principles [Text Block] OTHER ASSETS Transfers and Servicing of Financial Assets [Text Block] Restricted cash Variable Interest Entity, Consolidated, Carrying Amount, Restricted Cash Variable Interest Entity, Consolidated, Carrying Amount, Restricted Cash Retail installment contracts, net Variable Interest Entity, Consolidated, Carrying Amount, Retail Installment Contracts, Net Variable Interest Entity, Consolidated, Carrying Amount, Retail Installment Contracts, Net Leased vehicles, net Variable Interest Entity, Consolidated, Carrying Amount, Property Subject to or Available for Operating Lease, Net Variable Interest Entity, Consolidated, Carrying Amount, Property Subject to or Available for Operating Lease, Net Various other assets Variable Interest Entity, Consolidated, Carrying Amount, Other Assets Variable Interest Entity, Consolidated, Carrying Amount, Other Assets Notes payable Variable Interest Entity, Consolidated, Carrying Amount, Notes Payable Variable Interest Entity, Consolidated, Carrying Amount, Notes Payable Various other liabilities Variable Interest Entity, Consolidated, Carrying Amount, Other Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Other Liabilities Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Income tax receivables Income Taxes Receivable Other repossessed assets Other Repossessed Assets Prepaid expenses Prepaid Expense MSRs, at fair value Servicing Asset OREO Other Real Estate Miscellaneous assets and receivables Other Assets, Miscellaneous Total other assets INCOME TAXES Income Tax Disclosure [Text Block] INVESTMENT SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Minimum amount for commercial non-accrual loans Impaired Financing Receivable, Minimum Amount for Commercial Nonaccrual Loans Minimum amount for commercial nonaccrual loans defined as impaired loans. Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Impaired financing receivable with no related allowance recorded, recorded investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment Impaired financing receivable with related allowance recorded, recorded investment Impaired Financing Receivable, with Related Allowance, Recorded Investment Impaired financing receivable, recorded investment Impaired financing receivable with no related allowance recorded, unpaid principal balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Impaired financing receivable with related allowance recorded, unpaid principal balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Impaired financing receivable, unpaid principal balance Impaired Financing Receivable, Unpaid Principal Balance Impaired financing receivable, related specific reserves Impaired Financing Receivable, Related Allowance Impaired financing receivable with no related allowance recorded, average recorded investment Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Impaired financing receivable with related allowance recorded, average recorded investment Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Impaired financing receivables, average recorded investment Impaired Financing Receivable, Average Recorded Investment Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Recorded Investments, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] 30-59 days past due Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, 30 to 59 Days Past Due Financing receivables, including receivables held-for-sale, that are less than 60 days past due but more than 29 days past due. 68-89 days past due Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, 60 to 89 Days Past Due Financing receivables, including receivables held-for-sale, that are less than 90 days past due but more than 59 days past due. Greater than 90 days Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, Equal to Greater than 90 Days Past Due Financing receivables, including receivables held-for-sale, that are equal to or greater than 90 days past due. Total past due Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, Past Due Recorded Investment in financing receivables, including receivables held-for-sale, that are past due at the balance sheet date. Current Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, Current Financing receivables, including receivables held-for-sale, that are current. Recorded investment greater than 90 days and accruing Financing Receivable, Including Receivable Held-for-sale, Recorded Investment, 90 Days Past Due and Still Accruing Recorded investment in financing receivables, including receivable held-for-sale, that are 90 days or more past due and still accruing. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Unobservable Input Reconciliation Investments Available-for-sale [Member] Available-for-sale Securities [Member] Retail Installment Contracts Held for Investment [Member] MSRs [Member] Derivatives [Member] Derivative Financial Instruments, Assets [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Unobservable Input Reconciliation Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward] Fair Value, Assets, Unobservable Input Reconciliation, Calculation [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Balance, beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset Value This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Gains in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value using unobservable inputs (level 3). Gains/(losses) in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset, Gain (Loss) Included in Earnings Amount of gain (loss) recognized in earnings, arising from assets measured at fair value using unobservable inputs (level 3). Additions/Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset, Issues Issues that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset, Settlements Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Transfers into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Asset, Transfers, Net This element represents [net] transfers in to and out of assets measured at fair value using unobservable inputs (Level 3) which have taken place during the period. Balance, end of period Changes in unrealized gains (losses) included in earnings related to balances still held at end of period Fair Value, Change in Unrealized Gain (Loss) Included in Other Income This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured using significant unobservable inputs (Level 3). Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income including noncontrolling interest Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Gain on SCUSA Change in Control Noncash or Part Noncash, Gain (Loss) from Change in Control Noncash or Part Noncash, Gain (Loss) from Change in Control Net gain on sale of SCUSA shares Gain on sale of branches Gain (Loss) on Sale of Branches Gain (Loss) on Sale of Branches Provision for credit losses Deferred taxes Deferred Income Tax Expense (Benefit) Depreciation, amortization and accretion Other Depreciation and Amortization Net gain on sale of loans Gain (Loss) on Sales of Loans, Net Net gain on sale of investment securities Gain (Loss) on Investments Net gain on sale of leased vehicles Gain (Loss) on Sale of Leased Assets, Net, Operating Leases Loss on debt extinguishment Gains (Losses) on Extinguishment of Debt Net loss on real estate owned and premises and equipment Net Loss on Real Estate Owned and Premises and Equipment Net loss on real estate owned and premises and equipment. Stock-based compensation Share-based Compensation Equity earnings from equity method investments Income (Loss) from Equity Method Investments Distributions from equity method investments, net Proceeds from Equity Method Investment, Dividends or Distributions Originations of loans held for sale, net of repayments Payments for Origination and Purchases of Loans Held-for-sale Purchases of loans held-for-sale Payments to Purchase Loans Held-for-sale Proceeds from sales of loans held-for-sale Proceeds from Sale of Loans Held-for-sale Purchases of trading securities Payments for Trading Securities, Short-term Payments for Trading Securities, Short-term Proceeds from sales of trading securities Proceeds from Sale of Trading Securities, Short-term Proceeds from Sale of Trading Securities, Short-term Net change in: Increase (Decrease) in Operating Capital [Abstract] Other assets and bank owned life insurance Increase Decrease in Other Assets and Bank Owned Life Insurance Other assets and bank owned life insurance. Other liabilities Increase (Decrease) in Other Operating Liabilities Other Increase (Decrease) in Other Operating Assets and Liabilities, Net NET CASH PROVIDED BY OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sales of available-for-sale investment securities Proceeds from prepayments and maturities of available-for-sale investment securities Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Purchases of available-for-sale investment securities Payments to Acquire Available-for-sale Securities Proceeds from sales of other investments Proceeds from Sales of Other Investments Proceeds from Sales of Other Investments Purchases of other investments Payments to Acquire Other Investments Net change in restricted cash Increase (Decrease) in Restricted Cash Proceeds from sales of loans held for investment Proceeds from Sale of Loans Held-for-investment Purchases of loans held for investment Payments to Acquire Loans Held-for-investment Net change in loans other than purchases and sales Net Change in Loans Other than Purchases and Sales Net change in loans other than purchases and sales. Purchases of leased vehicles Payments to Acquire Capital Leased Assets Payments to Acquire Capital Leased Assets Proceeds from the sale of leased vehicles Proceeds from Sale of Capital Leased Assets Proceeds from Sale of Capital Leased Assets Manufacturer incentives Amortization of Manufacturer Incentives Amortization of Manufacturer Incentives Proceeds from sales of real estate owned and premises and equipment Proceeds from Sales of Real Estate Owned and Premises and Equipment Proceeds from sales of real estate owned and premises and equipment Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Net cash transferred on the sale of branches Net Cash Transferred on Sale of Branches Net Cash Transferred on Sale of Branches Proceeds from sale of SCUSA shares Gain (Loss) on Sale of Equity Investments Cash acquired in SCUSA Change in Control Cash Acquired from Change in Control Cash Acquired from Change in Control 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 [Abstract] Net change in deposits and other customer accounts Increase (Decrease) in Deposits Net change in short-term borrowings Proceeds from (Repayments of) Short-term Debt Net proceeds from long-term borrowings Proceeds from Issuance of Long-term Debt Repayments of long-term borrowings Repayments of Long-term Debt Proceeds from FHLB advances (with maturities greater than 90 days) Proceeds from Federal Home Loan Bank Advances Repayments of FHLB advances (with maturities greater than 90 days) Payments for Federal Home Loan Bank Advances Net change in advance payments by borrowers for taxes and insurance Net Change in Advance Payments by Borrowers for Taxes and Insurance Net change in advance payments by borrowers for taxes and insurance Cash dividends paid to preferred stockholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Dividends paid to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Proceeds from the issuance of common stock Proceeds from Issuance of Common Stock NET CASH PROVIDED BY/(USED IN) FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities NET CHANGE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD CASH AND CASH EQUIVALENTS, END OF PERIOD SUPPLEMENTAL DISCLOSURES Supplemental Cash Flow Information [Abstract] Income taxes paid/(received), net Income Taxes Paid, Net Interest paid Interest Paid NON-CASH TRANSACTIONS(1) Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Loans transferred to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Loans transferred to repossessed vehicles Real Estate Owned, Transfer to Repossessed Assets Real Estate Owned, Transfer to Repossessed Assets Loans transferred from held for investment to held for sale, net Transfer of Portfolio Loans and Leases to Held-for-sale Conversion of debt to common equity Debt Conversion, Converted Instrument, Amount Liquidation of common equity securities Liquidation of Common Equity Securities Liquidation of Common Equity Securities Mortgage-backed securities, Non-agency securities [Member] Mortgage-backed Securities, Issued by Private Enterprises [Member] Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-Sale Securities, Gross Unrealized Gain Accumulated in Investments Amount of accumulated pre-tax unrealized gains before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. Gross Unrealized Loss Fair Value Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Qualitative and Quantitative Information, Transferor's Continuing Involvement, Transferred Financial Assets, by Transfer or Transferee [Axis] Qualitative and Quantitative Information, Transferor's Continuing Involvement, Transferred Financial Assets, by Transfer or Transferee [Axis] Qualitative and Quantitative Information, Transferor's Continuing Involvement in Transferred Financial Assets, Transfer or Transferee [Domain] Qualitative and Quantitative Information, Transferor's Continuing Involvement in Transferred Financial Assets, Transfer or Transferee [Domain] Trusts [Member] Trusts [Member] Trusts [Member] Chrysler Capital Securitizations [Member] Chrysler Capital Securitizations [Member] Chrysler Capital Securitizations [Member] Other Unrelated Third Parties [Member] Third Party [Member] Third Party [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] VIE, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary [Member] Securitization Entities [Member] Securitization Entities [Member] Securitization entities. Home Equity Loans and Lines of Credit [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Gross retail installment contracts transferred to consolidated Trusts Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding Proceeds from securitization of retail installment contracts Proceeds from Securitization of Retail Installment Contracts Proceeds from Securitization of Retail Installment Contracts Gain on securitization of financial assets Gain (Loss) on Securitization of Financial Assets Gross retail installment contracts sold in off-balance sheet securitizations Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together, Principal Amount Outstanding Receivable from securitizations Accounts Receivable from Securitization Principal amount outstanding on loans securitized Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement Principal amount outstanding on loans securitized, greater than 90 days past due Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement, Greater than 90 Days Past Due This is the principal amount outstanding greater than 90 days past due for securitized loans only (across all types of loans). Net credit losses on securitized loans Net Credit Losses on Securitized Loans Net Credit Losses on Securitized Loans Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic concentration risk [Member] Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Total available-for-sale securities [Member] Available-for-sale Securities, Total [Member] Total available-for-sale securities, when it serves as a benchmark in a concentration of risk calculation, representing the sum of all reported available-for-sale securities as of the balance sheet date. Investment Geographic Region [Axis] Investment Geographic Region [Axis] Investment Geographic Region [Domain] Investment Geographic Region [Domain] Texas [Member] TEXAS Florida [Member] FLORIDA California [Member] CALIFORNIA Other States [Member] Other States [Member] Other States [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration risk, percentage Concentration Risk, Percentage Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table] Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table] Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Adverse Change in Assumption, by Type [Axis] Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Adverse Change in Assumption, by Type [Axis] Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items] Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items] Sensitivity analysis of fair value, impact of 10 percent adverse change in prepayment speed Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Sensitivity analysis of fair value, impact of 20 percent adverse change in prepayment speed Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Sensitivity analysis of fair value, impact of 10 percent adverse change in discount rate Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate Sensitivity analysis of fair value, impact of 20 percent adverse change in discount rate Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate Offsetting [Abstract] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Other derivative activities [Member] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Statement of Financial Position Derivative Liability, Fair Value, Gross Asset Net Amounts of Liabilities Presented in the Statement of Financial Position Derivative Liability, Fair Value, Amount Not Offset Against Collateral Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments Derivative, Collateral, Right to Reclaim Securities Gross Amounts Not Offset in the Statement of Financial Position - Cash Collateral Pledged Derivative, Collateral, Right to Reclaim Cash Net Amount, Subject to Master Netting Arrangement or Similar Arrangement Derivative Liability, Fair Value, Amount Offset Against Collateral, Subject to Master Netting Arrangement or Similar Arrangement Derivative Liability, Fair Value, Amount Offset Against Collateral, Subject to Master Netting Arrangement or Similar Arrangement Derivative Liability, Not Subject to Master Netting Arrangement Derivative Liability, Not Subject to Master Netting Arrangement Gross Amounts of Recognized Liabilities, Including Derivatives Not Subject to Master Netting Arrangement Derivative Liability, Fair Value, Gross Liability, Including Derivatives Not Subject to Master Netting Arrangement Derivative Liability, Fair Value, Gross Liability, Including Derivatives Not Subject to Master Netting Arrangement Net Amounts of Liabilities Presented in the Statement of Financial Position, Total Derivatives Liabilities Net Amount, Total Derivatives Liabilities Derivative Liability, Fair Value, Amount Offset Against Collateral Gross Amounts of Recognized Liabilities, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Gross Amounts Offset in the Statement of Financial Position, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Net Amounts of Liabilities Presented in the Statement of Financial Position, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Resell, Securities Loaned, Collateral, Right to Reclaim Securities Gross Amounts Not Offset in the Statement of Financial Position - Cash Collateral Pledged, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Resell, Securities Loaned, Collateral, Right to Reclaim Cash Net Amount, Total Financial Liabilities Derivative Liability, Securities Sold under Agreements to Resell, Securities Loaned, Amount Offset Against Collateral Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) Comprehensive Income (Loss) Note [Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Santander [Member] Santander [Member] Santander [Member] Banco Santander [Member] Parent Company [Member] Subsidiary, Sale of Stock [Axis] Subsidiary, Sale of Stock [Axis] Sale of Stock, Name of Transaction [Domain] Sale of Stock, Name of Transaction [Domain] Stock Issued for Cash [Member] Stock Issued for Cash [Member] Stock Issued for Cash [Member] Extinguishment of Debt [Member] Long-term Debt [Member] Class of Stock [Line Items] Class of Stock [Line Items] Income Statement [Abstract] INTEREST INCOME: Interest and Dividend Income, Operating [Abstract] Loans Interest and Fee Income, Loans and Leases Interest-earning deposits Interest Income, Deposits with Financial Institutions Investment securities: Interest and Dividend Income, Securities, by Classification [Abstract] Available-for-sale Interest and Dividend Income, Securities, Operating, Available-for-sale Other investments Interest and Dividend Income, Securities, Operating, Other TOTAL INTEREST INCOME Interest and Dividend Income, Operating INTEREST EXPENSE: Interest Expense [Abstract] Deposits and customer accounts Interest Expense, Deposits Borrowings and other debt obligations Interest Expense, Borrowings TOTAL INTEREST EXPENSE Interest Expense NET INTEREST INCOME NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Interest Income (Expense), after Provision for Loan Loss NON-INTEREST INCOME: Noninterest Income [Abstract] Consumer fees Fees and Commissions, Depositor Accounts Commercial fees Commercial Banking Fees Commercial banking fees. Mortgage banking income, net Fees and Commissions, Mortgage Banking Equity method investments Bank owned life insurance Bank Owned Life Insurance Income Miscellaneous income Noninterest Income, Other Operating Income TOTAL FEES AND OTHER INCOME Fees and Other Income Total fees and other income. OTTI recognized in earnings Gain on Change in Control Net gain on sale of investment securities Realized Gains (Losses), Net, Sale of Investment Securities Realized Gains (Losses), Net, Sale of Investment Securities Net gain/(loss) recognized in earnings Net Gain Loss on Investment Securities Recognized in Earnings Net gain/(loss) on investment securities recognized in earnings TOTAL NON-INTEREST INCOME GENERAL AND ADMINISTRATIVE EXPENSES: General and Administrative Expense [Abstract] Compensation and benefits Labor and Related Expense Occupancy and equipment expenses Occupancy, Net Technology expense Information Technology and Data Processing Outside services Professional Fees Marketing expense Marketing Expense Loan expense Loan Portfolio Expense Other administrative expenses Other General and Administrative Expense TOTAL GENERAL AND ADMINISTRATIVE EXPENSES General and Administrative Expense OTHER EXPENSES: Other Expenses [Abstract] Amortization of intangibles Amortization of Intangible Assets Deposit insurance premiums and other expenses Federal Deposit Insurance Corporation Premium Expense Impairment of long-lived assets Impairment of Long-Lived Assets Held-for-use TOTAL OTHER EXPENSES Other Expenses INCOME BEFORE INCOME TAXES NET INCOME INCLUDING NONCONTROLLING INTEREST LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST Net Income (Loss) Attributable to Noncontrolling Interest NET INCOME ATTRIBUTABLE TO SHUSA Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Accumulated other comprehensive income (loss), cash flow hedge derivative financial instruments, beginning balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Change in accumulated gains (losses) on cash flow hedge derivative financial instruments, pretax activity Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Change in accumulated gains (losses) on cash flow hedge derivative financial instruments, tax effect Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Change in accumulated gains (losses) on cash flow hedge derivative financial instruments, net activity Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Reclassification adjustment for net losses on cash flow hedge derivative financial instruments, pretax activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Reclassification adjustment for net losses on cash flow hedge derivative financial instruments, tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Reclassification adjustment for net losses on cash flow hedge derivative financial instruments, net activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Net unrealized gains (losses) on cash flow hedge derivative financial instruments, pretax activity Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Net unrealized gains (losses) on cash flow hedge derivative financial instruments, tax effect Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Net unrealized gains (losses) on cash flow hedge derivative financial instruments, net activity Accumulated other comprehensive income (loss), cash flow hedge derivative financial instruments, ending balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Accumulated other comprehensive income (loss), investment securities available-for-sale, beginning balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Change in unrealized gains/(losses) on investment securities available-for-sale, pretax activity Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Change in unrealized gains/(losses) on investment securities available-for-sale, tax effect Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Change in unrealized gains/(losses) on investment securities available-for-sale, net activity Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for net gains (losses) included in net income on non-OTTI securities, pretax activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, before Tax Reclassification adjustment for net gains (losses) included in net income on non-OTTI securities, tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, Tax Reclassification adjustment for net gains (losses) included in net income on non-OTTI securities, net activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Non-OTTI Securities, Net of Tax Reclassification adjustment for net gains included in net income on OTTI securities, pretax activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, before Tax Reclassification adjustment for net gains included in net income on OTTI securities, tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, Tax Reclassification adjustment for net gains included in net income on OTTI securities, net activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of OTTI Securities, Net of Tax Total reclassification adjustment for net gains included in net income, pretax activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Total reclassification adjustment for net gains included in net income, tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Total reclassification adjustment for net gains included in net income, net activity Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net unrealized gains/(losses) on investment securities available-for-sale, pretax activity Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Net unrealized gains/(losses) on investment securities available-for-sale, tax effect Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Net unrealized gains/(losses) on investment securities available-for-sale, net activity Accumulated other comprehensive income (loss), investment securities available-for-sale, ending balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Accumulated other comprehensive income (loss), defined benefit plans, beginning balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Pension and post-retirement actuarial gain/(loss), pretax activity Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Pension and post-retirement actuarial gain/(loss), tax effect Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax Pension and post-retirement actuarial gain/(loss), net activity Accumulated other comprehensive income (loss), defined benefit plans, ending balance Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Accumulated other comprehensive income (loss), beginning balance Other comprehensive income (loss), pretax activity Other Comprehensive Income (Loss), before Tax Other comprehensive income (loss), tax effect Other Comprehensive Income (Loss), Tax Accumulated other comprehensive income (loss), ending balance Schedule of Loans Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Consumer Loans Held for Investment [Member] Consumer Loans Held for Investment [Member] Consumer Loans Held for Investment [Member] Schedule of Loans Receivable by Credit Quality Classification Schedule of Loans Receivable by Credit Quality Classification [Table Text Block] Tabular disclosure of loans receivable by credit quality classification Schedule of Loans by Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Allowance for Credit Losses by Portfolio Segment Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of Non-accrual Loans Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Aging Analysis of Loan Portfolio Past Due Financing Receivables [Table Text Block] Schedule of Impaired Loans by Class Impaired Financing Receivables [Table Text Block] Schedule of Financing Receivable, by Credit Score Schedule of Financing Receivable, by Credit Score [Table Text Block] Tabular disclosure of financing receivable by credit score. Schedule of Financing Receivable by LTV Schedule of Financing Receivable by LTV [Table Text Block] Schedule of Financing Receivable by LTV [Table Text Block] Schedule of Troubled Debt Restructurings on Financing Receivables, Performing and Nonperforming [Table Text Block] Troubled Debt Restructurings on Financing Receivables, Performing and Nonperforming [Table Text Block] Tabular disclosure of troubled debt restructurings on financing receivables by performing and non-performing receivables. Schedule of Troubled Debt Restructurings Troubled Debt Restructurings on Financing Receivables [Table Text Block] Schedule of Troubled Debt Restructurings Subsequently Defaulted Troubled Debt Restructurings Subsequent Defaulted [Table Text Block] Details of Troubled Debt Restructurings which have Subsequently Defaulted. Offsetting Assets [Table] Offsetting Assets [Table] Offsetting Assets [Line Items] Offsetting Assets [Line Items] Gross Amounts of Recognized Assets Derivative Asset, Fair Value, Gross Asset Gross Amounts Offset in the Statement of Financial Position Derivative Asset, Fair Value, Gross Liability Net Amounts of Assets Presented in the Statement of Financial Position Derivative Asset, Fair Value, Amount Not Offset Against Collateral Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments Derivative, Collateral, Obligation to Return Securities Gross Amounts Not Offset in the Statement of Financial Position - Cash Collateral Received Derivative, Collateral, Obligation to Return Cash Net Amount, Subject to Master Netting Arrangement or Similar Arrangement Derivative Asset, Fair Value, Amount Offset Against Collateral, Subject to Master Netting Arrangement or Similar Arrangement Derivative Asset, Fair Value, Amount Offset Against Collateral, Subject to Master Netting Arrangement or Similar Arrangement Derivative Asset, Not Subject to Master Netting Arrangement Derivative Asset, Not Subject to Master Netting Arrangement Gross Amounts of Recognized Assets, Total Derivatives Assets, Including Derivatives Not Subject to Master Netting Arrangement Derivative Asset, Fair Value, Gross Asset, Including Derivatives Not Subject to Master Netting Arrangement Derivative Asset, Fair Value, Gross Asset, Including Derivatives Not Subject to Master Netting Arrangement Net Amounts of Assets Presented in the Statement of Financial Position, Total Derivatives Assets Net Amount, Total Derivatives Assets Derivative Asset, Fair Value, Amount Offset Against Collateral Gross Amounts of Recognized Assets, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross Gross Amounts Offset in the Statement of Financial Position, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability Net Amounts of Assets Presented in the Statement of Financial Position, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Securities Gross Amounts Not Offset in the Statement of Financial Position - Cash Collateral Received, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash Net Amount, Total Financial Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Third Party [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Derivative Instrument Activity [Axis] Derivative Instrument Activity [Axis] Derivative Instrument Activity [Axis] Derivative Instrument Activity [Domain] Derivative Instrument Activity [Domain] Derivative Instrument Activity [Domain] Mortgage banking derivatives [Member] Mortgage Banking Derivatives [Member] Mortgage banking derivatives Mortgage srvicing rights [Member] Mortgage Servicing Rights Derivative Contract [Member] Mortgage Servicing Rights Derivative Contract [Member] Swaps receive fixed [Member] Interest Rate Swaps, Receive Fixed [Member] Interest rate swaps, receive fixed. Swaps pay fixed [Member] Interest Rate Swaps, Pay Fixed [Member] Interest rate swaps, pay fixed Foreign exchange contracts [Member] Option for interest rate cap agreements [Member] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Warrant [Member] Warrant [Member] Proceeds from issuance of debt pledged with certain bonds Proceeds from Issuance of Debt Basis spread on variable rate Derivative, Basis Spread on Variable Rate Facility term Debt Instrument, Term Derivative Instruments Not Designated as Hedging Instruments [Abstract] Derivative Instruments Not Designated as Hedging Instruments [Abstract] Notional Asset derivatives, Fair value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Liability derivatives, Fair value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Fair value of warrants Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] SHUSA [Member] Schedule of Borrowings and Other Debt Obligation Schedule of Debt [Table Text Block] Available-for-sale Securities Available-for-sale Securities [Table Text Block] Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Realized Gain (Loss) on Investments Realized Gain (Loss) on Investments [Table Text Block] Receivable Type [Axis] Receivable Type [Axis] Receivable Type [Domain] Receivable [Domain] Loans receivable [Member] Loans Receivable [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Retail installment contracts [Member] Retail Installment Portfolio [Member] Retail Installment Portfolio [Member] Loans pledged as collateral Loans Pledged as Collateral Direct and leveraged lease financing amount Leveraged Lease Investment Loans held-for-sale Interest income earned on troubled debt restructurings Interest Income, Troubled Debt Restructurings Interest income recognized on troubled debt restructurings during the period. TDRs, number of days past due after modification considered to have subsequently defaulted Troubled Debt Restructuring, Number of Days Past Due After Modification Considered Subsequently Defaulted Troubled Debt Restructuring, Number of Days Past Due After Modification Considered Subsequently Defaulted VARIABLE INTEREST ENTITIES Variable Interest Entities and Securitizations [Text Block] Variable Interest Entities and Securitizations [Text Block] Not designated as hedging instrument [Member] Not Designated as Hedging Instrument [Member] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting Assets Offsetting Assets [Table Text Block] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Accrued investment income receivable Accrued Investment Income Receivable Stock of FHLB of Pittsburgh and the Federal Reserve Board Federal Home Loan Bank Stock and Federal Reserve Bank Stock FHLB Stock, par value (in usd per share) Federal Home Loan Bank Stock, par value Federal Home Loan Bank Stock, par value Sale of FHLB stock Proceeds from Sale of Federal Home Loan Bank Stock Accounting Policies [Abstract] Premises and Equipment Property, Plant and Equipment [Table Text Block] Loans held for sale [Member] Loans Held for Sale [Member] Loans Held for Sale [Member] Eligible Item or Group for Fair Value Option [Axis] Eligible Item or Group for Fair Value Option [Axis] Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Residential mortgage loans held for sale Fair Value, Option, Loans Held for Sale, Aggregate Amount Fair Value, Option, Loans Held for Sale, Aggregate Amount Aggregate Unpaid Principal Balance, Residential mortgage loans held for sale Loans Held-for-sale, Unpaid Principal Balance Unpaid principal balance of loans held-for-sale. Difference, Residential mortgage loans held for sale Fair Value, Option, Loans Held for Sale, Aggregated Difference Fair Value, Option, Loans Held for Sale, Aggregated Difference Fair Value, Nonaccrual loans Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status Aggregate Unpaid Principal Balance, Nonaccrual loans Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status, Aggregate Unpaid Principal Balance Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status, Aggregate Unpaid Principal Balance Difference, Nonaccrual loans Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status, Aggregated Difference Fair Value, Option, Loans Held for Sale, Aggregate Amount in Nonaccrual Status, Aggregated Difference Fair Value, Retail installment contracts held for investment Fair Value, Option, Loans Held as Assets, Aggregate Amount Fair Value, Option, Loans Held as Assets, Aggregate Amount Aggregate Unpaid Principal Balance, Retail installment contracts held for investment Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Difference, Retail installment contracts held for investment Fair Value, Option, Loans Held as Assets, Aggregated Difference Fair Value, Option, Loans Held as Assets, Aggregated Difference Fair Value, Nonaccrual loans Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status Aggregate Unpaid Principal Balance, Nonaccrual loans Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status, Aggregate Unpaid Principal Balance Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status, Aggregate Unpaid Principal Balance Difference, Nonaccrual loans Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status, Aggregated Difference Threshold period for discontinuing and reversing accrual of interest Threshold Period for Discontinuing and Reversing Interest Accrual Threshold Period for Discontinuing and Reversing Interest Accrual Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Chrysler Relationship [Member] Customer Relationships [Member] Core deposit intangibles [Member] Core Deposits [Member] Other Intangibles [Member] Other Intangible Assets [Member] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] [Line Items] for Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table] Net Carrying Amount Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangibles subject to amortization Finite-Lived Intangible Assets, Net Intangibles not subject to amortization Indefinite-Lived Intangible Assets (Excluding Goodwill) Total intangibles Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization GOODWILL AND OTHER INTANGIBLES Goodwill and Intangible Assets Disclosure [Text Block] Gain attributable to the remaining equity interest Business Combination, Gain Recognized, Amount Attributable to Acquiree Shares Sold Business Combination, Gain Recognized, Amount Attributable to Acquiree Shares Sold Total pre-tax gain Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain Number of shares issued Sale of Stock, Number of Shares Issued in Transaction Receivables securitized Proceeds from Accounts Receivable Securitization Net proceeds from new securitizations Cash Flows Between Transferor and Transferee, Proceeds from New Transfers Cash received for servicing fees Cash Flows Between Transferor and Transferee, Servicing Fees Cash received upon release from reserved and restricted cash accounts Proceeds Received from Reserved and Restricted Cash Proceeds Received from Reserved and Restricted Cash Net distributions from Trusts Distributions Received from Variable Interest Entity Distributions Received from Variable Interest Entity Total cash received from securitization trusts Cash Flows Between Transferor and Transferee Cash Flows Between Transferor and Transferee Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Foreclosure Matters [Member] Foreclosure Matters [Member] Foreclosure Matters [Member] Identity Theft Protection Product Matter [Member] Identity Theft Protection Product Matter [Member] Identity Theft Protection Product Matter [Member] General and Administrative Expense [Member] General and Administrative Expense [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss contingency, maximum possible loss Loss Contingency, Range of Possible Loss, Maximum Consent order, number of mortgage servicers Consent Order, Mortgage Servicers Consent Order, Mortgage servicing provider Number of mortgage servicing companies Number of Mortgage Servicing Companies Number of Mortgage Servicing Companies Remediation fund amount Litigation Settlement, Expenses, Remediation Fund Litigation Settlement, Expenses, Remediation Fund Remediation fund engaging period Litigation Settlement, Remediation Fund Engaging Period Litigation Settlement, Remediation Fund Engaging Period Principal engaging in mortgage modifications Litigation Settlement, Expenses, Principal Engaging in Mortgage Modifications Litigation Settlement, Expenses, Principal Engaging in Mortgage Modifications Mortgage loan amount submitted for credit from OCC Mortgage Loan Amount Submitted for Credit Mortgage Loan Amount Submitted for Credit Litigation settlement incurred by the Bank as percentage of total settlement amount Litigation Settlement Incurred by Entity as Percentage of Total Settlement Amount Litigation Settlement Incurred by Entity as Percentage of Total Settlement Amount Litigation settlement amount accumulated by different banks Litigation Settlement, Amount Accumulated by Different Banks Litigation Settlement, Amount Accumulated by Different Banks Litigation settlement gross amount Litigation Settlement, Amount Expected fees to be returned to customers Expected Fees to be Returned to Customers Expected Fees to be Returned to Customers Identity theft protection payments returned to customers Gain (Loss) Related to Litigation Settlement 2014, Calendar Year Amount Finite-Lived Intangible Assets, Amortization Expense, During Year One Finite-Lived Intangible Assets, Amortization Expense, During Year One 2014, Recorded To Date 2014, Remaining Amount To Record Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2015 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Four Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five STOCKHOLDER'S EQUITY Stockholders' Equity Note Disclosure [Text Block] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End 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 Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Line of Credit Facility [Table] Line of Credit Facility [Table] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Warehouse Line due June 2014 [Member] Warehouse Line due June 2014 [Member] Warehouse Line due June 2014 [Member] Warehouse Line due on Various Dates [Member] Warehouse Line due on Various Dates [Member] Warehouse Line due on Various Dates [Member] Warehouse Line due March 2015 [Member] Warehouse Line due March 2015 [Member] Warehouse Line due March 2015 [Member] Warehouse Line due July 2015 [Member] Warehouse Line due July 2015 [Member] Warehouse Line due July 2015 [Member] Warehouse Line due September 2015 [Member] Warehouse Line due September 2015 [Member] Warehouse Line due September 2015 [Member] Warehouse Line due December 2015 [Member] Warehouse Line due December 2015 [Member] Warehouse Line due December 2015 [Member] Warehouse Line due December 2015 [Member] Warehouse Line due December 2015 1 [Member] Warehouse Line due December 2015 1 [Member] Warehouse Line due January 2016 [Member] Warehouse Line due January 2016 [Member] Warehouse Line due January 2016 [Member] Warehouse Line due November 2016 [Member] Warehouse Line due November 2016 [Member] Warehouse Line due November 2016 [Member] Repurchase Facility due on Various Dates [Member] Repurchase Facility due on Various Dates [Member] Repurchase Facility due on Various Dates [Member] Line of Credit with Related Party due December 2016 [Member] Line of Credit with Related Party due December 2016 [Member] Line of Credit with Related Party due December 2016 [Member] Line of Credit with Related Party due December 2016 [Member] Line of Credit with Related Party due December 2016 1 [Member] Line of Credit with Related Party due December 2016 1 [Member] Line of Credit with Related Party due December 2018 [Member] Line of Credit with Related Party due December 2018 1 [Member] Line of Credit with Related Party due December 2018 1 [Member] Public Securitizations due on Various Dates [Member] Public Securitizations due on Various Dates [Member] Public Securitizations due on Various Dates [Member] Privately Issued Amortizing Notes due on Various Dates [Member] Privately Issued Amortizing Notes due on Various Dates [Member] Privately Issued Amortizing Notes due on Various Dates [Member] Line of Credit with Related Party [Member] Line of Credit with Related Party [Member] Line of Credit with Related Party [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Balance, revolving credit facilities Balance, secured structured financings Secured Debt Lease financing, percentage of outstanding balance Lease Financing Percentage Lease Financing Percentage Facility rolling maturity period Line of Credit Facility, Expiration Period Unsecured debt Unsecured Debt 3.00% senior notes, due September 2015 [Member] Senior Notes Due September 2015 [Member] Senior Notes Due September 2015 [Member] 4.625% senior notes, due April 2016 [Member] Senior Notes Due April 2016 [Member] Senior Notes Due April 2016 [Member] 3.45% senior notes, due August 2018 [Member] Three Point Forty Five Percent Senior Notes, Due August 2018 [Member] Three Point Forty Five Percent Senior Notes, Due August 2018 [Member] Subordinated notes, due March 2020 [Member] Subordinated Notes Due March 2020 [Member] Subordinated Notes Due March 2020 [Member] Junior subordinate debentures - Capital Trust IV, due March 2034 [Member] Junior Subordinated Debt Due March 2034 [Member] Junior Subordinated Debt Due March 2034 [Member] Common securities - Capital Trust IV [Member] Common Securities Due to Capital Trust IV [Member] Common Securities Due to Capital Trust IV [Member] Junior subordinate debentures - Capital Trust VI, due June 2036 [Member] Junior Subordinated Debt Due June 2036 [Member] Junior Subordinated Debt Due June 2036 [Member] Common securities - Capital Trust VI [Member] Common Securities Due to Capital Trust VI [Member] Common Securities Due to Capital Trust VI [Member] Junior subordinate debentures - Capital Trust IX, due July 2036 [Member] Junior Subordinated Debt Due July 2036 [Member] Junior Subordinated Debt Due July 2036 [Member] Common securities - Capital Trust IX [Member] Common Securities Due to Capital Trust IX [Member] Common Securities Due to Capital Trust IX [Member] Trust PIERS [Member] Trust PIERS [Member] Trust PIERS [Member] Senior notes, Balance Senior Notes Subordinated notes, due March 2020, Balance Junior Subordinated Notes Common securties, Balance Common Securties Common Securties Total holding company borrowings and other debt obligations Debt and Capital Lease Obligations Subordinated debt converted, original value Debt Conversion, Original Debt, Amount Number of shares issued upon conversion Debt Conversion, Converted Instrument, Shares Issued Amount of securities called and retired Extinguishment of Debt, Amount Basis of Presentation and Accounting Policies [Table] Basis of Presentation and Accounting Policies [Table] Basis of Presentation and Accounting Policies [Table] IPO [Member] IPO [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Commercial loans and consumer loans [Member] Commercial Loans and Consumer Loans [Member] Commercial Loans and Consumer Loans [Member] Credit card receivable [Member] Credit Card Receivable [Member] Commercial loan [Member] Commercial Loan [Member] Consumer loan [Member] Consumer Loan [Member] Auto loans [Member] Auto Loans [Member] Auto Loans [Member] Unsecured revolving loan [Member] Unsecured Debt [Member] Term loan [Member] Term Loan [Member] Term Loan [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Office buildings [Member] Office Building [Member] Leasehold improvements [Member] Leasehold Improvements [Member] Software [Member] Computer Software, Intangible Asset [Member] Furniture, fixtures and equipment [Member] Funiture, Fixtures and Equipment [Member] Funiture, Fixtures and Equipment [Member] Automobiles [Member] Automobiles [Member] Basis of Presentation and Accounting Policies [Line Items] Basis of Presentation and Accounting Policies [Line Items] [Line Items] for Basis of Presentation and Accounting Policies [Table] Ownership percentage before sale of stock Sale of Stock, Percentage of Ownership before Transaction Ownership percentage after sale of stock Sale of Stock, Percentage of Ownership after Transaction Amount reclassified to Core Deposit Intangibles and Other Intangibles Prior Period Reclassification Adjustment Loans transferred from held for investment to held for sale Minimum days of loan payment delinquent that interest income not recognized Financing Receivable, Nonaccrual Status, Threshold Period Past Due Financing Receivable, Nonaccrual Status, Threshold Period Past Due Threshold period after receipt of notification of death or bankruptcy Financing Receivable, Nonaccrual Status, Threshold Period after Receipt of Notification of Death or Bankruptcy Financing Receivable, Nonaccrual Status, Threshold Period after Receipt of Notification of Death or Bankruptcy Impaired loans, minimum commercial non-accrual loans Period of time not resulting loan identified as impaired Period of Time Not Resulting Loan Identified as Impaired Period of Time Not Resulting Loan Identified as Impaired Threshold period past due for charged-off of loans Threshold Period Past Due for Write-off of Financing Receivable Premises and equipment, useful lives Property, Plant and Equipment, Useful Life Goodwill recognized Intangible assets recognized OREO and other repossessed assets Other Real Estate, Foreclosed Assets, and Repossessed Assets Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Carrying Value [Member] Reported Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial Instruments, Financial Assets [Abstract] Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and amounts due from depository institutions Cash and Cash Equivalents, Fair Value Disclosure Debentures of FHLB US Government Agencies Securities, at Carrying Value Loans held for investment, net Restricted Cash Restricted cash, fair value disclosure Restricted cash, fair value disclosure Financial Instruments, Financial Liabilities [Abstract] Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Deposits, Fair Value Disclosure Borrowings and other debt obligations Debt Instrument, Fair Value Disclosure Gain on trading securities Net Realized and Unrealized Gain (Loss) on Trading Securities Gain on securities sold Trading Securities, Realized Gain (Loss) Unrealized loss on trading securities still held Trading Securities, Change in Unrealized Holding Gain (Loss) LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Nonperforming Assets [Table] Nonperforming Assets [Table] Nonperforming assets. Nonperforming Assets [Line Items] Nonperforming Assets [Line Items] Nonperforming assets. Non-accrual loans Financing Receivable, Recorded Investment, Nonaccrual Status Other real estate owned Real Estate Acquired Through Foreclosure Repossessed vehicles Repossessed Vehicles Repossessed Vehicles Total other real estate owned and other repossessed assets Repossessed Assets Total non-performing assets Schedule of Commitments Amount Schedule of Commitments Amount [Table Text Block] Schedule of Commitments Amount [Table Text Block] Schedule of Commitments, by Maturities Schedule of Commitments, by Maturities [Table Text Block] Tabular disclosure of commitments and contingencies by maturities. Schedule of Representation and Warranty Reserve Activity Schedule of Representation and Warranty Reserve Activity [Table Text Block] Rollforward of activities in the liability for representation and warranty reserve (loan repurchase losses) Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Consolidation Consolidation, Variable Interest Entity, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Subsequent Events Subsequent Events, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investment Securities and Other Investments Investment, Policy [Policy Text Block] Loans held for investment Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block] Troubled debt restructurings Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block] Loans Held-for-Sale Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block] Allowance for Loan Losses and Reserve for Unfunded Lending Commitments Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Leases Loans and Leases Receivable, Lease Financing, Policy [Policy Text Block] Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Cost and Equity Method Investments Equity and Cost Method Investments, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Intangible Assets, excluding Goodwill Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Mortgage Servicing Rights and Asset Securitizations Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Bank Owned Life Insurance Life Insurance, Corporate or Bank Owned [Policy Text Block] Life Insurance, Corporate or Bank Owned [Policy Text Block] Other Real Estate Owned and Other Repossessed Assets Other Real Estate Owned and Other Repossessed Assets [Policy Text Block] Other Real Estate Owned and Other Repossessed Assets [Policy Text Block] Derivative Instruments and Hedging Activity Derivatives, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Recent Accounting Developments New Accounting Pronouncements, Policy [Policy Text Block] Commercial Lending Asset Quality Indicators Credit Quality of Financing Receivables [Policy Text Block] Policy of credit quality indicators used for commercial and consumer loans. BASIS OF PRESENTATION AND ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] COMMITMENTS, CONTINGENCIES, AND GUARANTEES Commitments and Contingencies Disclosure [Text Block]