Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Extension of loan
Extension Of Loan [Member]
Extension Of Loan
Trading Arrangement:
Trading Arrangement [Axis]
Maximum
Maximum [Member]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Title of 12(b) Security
Title of 12(b) Security
Carrying Value
Reported Value Measurement [Member]
Subsequent Event
Subsequent Event [Member]
Schedule of Available-for-sale Securities [Table]
Debt Securities, Available-for-Sale [Table]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]
Derivative Instruments, Gain (Loss) [Table]
Schedule of Assets Measured at Fair Value on a Nonrecurring Basis
Fair Value Measurements, Nonrecurring [Table Text Block]
Charge-offs, net of recoveries
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Pledged Status [Axis]
Pledged Status [Axis]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instrument [Axis]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Warehouse lines with Santander, maturing through October 2027
Warehouse Line Due October 2027 [Member]
Warehouse Line Due October 2027
Summary of PCD AND PSL Loans Acquired
Financing Receivable, Carrying Value of Purchased with Credit Duration and Purchased Seasoned Loan [Table Text Block]
Financing Receivable, Carrying Value of Purchased with Credit Duration and Purchased Seasoned Loan
FRB stock redeemed at par
Proceeds from Sale of Federal Reserve Bank Stock
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Other comprehensive income (loss), tax effect
Other Comprehensive Income (Loss) before Reclassifications, Tax
Mortgage servicing rights
MSRs
Servicing Asset at Fair Value, Amount
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Securities sold under agreements to repurchase
Repurchase agreements
Security Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement
Security Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement
Net amounts of assets included on the Condensed Consolidated Balance Sheets
Security Borrowed, Subject to Master Netting Arrangement, after Offset
PCD
Financial Asset Acquired with Credit Deterioration [Member]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Dividend accrual, variable rate for each dividend re-set period
Temporary Equity, Dividend Accrual, Variable Rate For Each Dividend Re-Set Period
Temporary Equity, Dividend Accrual, Variable Rate For Each Dividend Re-Set Period
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Financing receivable, purchased with credit deterioration, gross purchase amount
Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value
Servicing Assets
MSRs
Servicing Assets [Member]
Servicing assets
ABS
ABS and other interests in structured securities
ABS
Asset-Backed Securities [Member]
Doubtful
Doubtful [Member]
DEPOSITS AND OTHER CUSTOMER ACCOUNTS
Deposit Liabilities Disclosures [Text Block]
Fee income
Fee Income
Leases [Abstract]
Leases [Abstract]
OTHER COMPREHENSIVE INCOME / (LOSS), NET OF TAX
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Total Financing Receivables
Total Financing Receivables
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process
Schedule of Amortized Cost, Gross Unrealized Gains and Losses and Fair Values of Investments in Debt Securities, HTM
Debt Securities, Held-to-Maturity [Table Text Block]
RELATED PARTY TRANSACTIONS
Related Party Transactions Disclosure [Text Block]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Prior
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff
Settlements
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements
Unrealized Losses
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Prior
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year
Intangible assets, net
Total Other intangible assets
Intangible Asset, Excluding Goodwill, after Accumulated Amortization
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral pledged
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Loans held for investment, net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Held For Investment, Net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Held For Investment, Net
Schedule of Loan Modifications and Performance of Modified Loans
Financing Receivable, Modified [Table Text Block]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Borrowings (Note 7)
Borrowings [Member]
Total collateral pledged
Debt Instrument, Collateral Amount
Common stock awards converted
Business Combination, Consideration Transferred, Equity Interests Issuable
Business Combination, Consideration Transferred, Equity Interests Issuable
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Unrealized Losses
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
CDs (as a percent)
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Certificates of Deposit
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Certificates of Deposit
Gross amounts of recognized assets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, before Offset
Customer relationships
Customer Relationships [Member]
Schedule of Derivatives Designated as Accounting Hedge
Schedule of Derivative Instruments [Table Text Block]
CLNs Due November 2035
Credit-Linked Notes Due November 2035 [Member]
Credit-Linked Notes Due November 2035
Cash flow hedge gains to be reclassified within 12 months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Entity Address, City or Town
Entity Address, City or Town
Total
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned
Money market
Deposits, Money Market Deposits
Class of Financing Receivable [Domain]
Class of Financing Receivable [Domain]
Class of Financing Receivable [Domain]
Receivables [Abstract]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Current Fiscal Year
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff
Net Carrying Amount
Intangible Asset, Finite-Lived, after Accumulated Amortization
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Level 2
Fair Value, Inputs, Level 2 [Member]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
2029
Lessor, Operating Lease, Payment to be Received, Year Three
90 Days or Greater
90+ DPD
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Beneficial Interest in Structured LLC
Beneficial Interest [Member]
Beneficial Interest
Fair value of underlying collateral
Securities Held as Collateral, at Fair Value
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Weighted Average Receive Rate
Derivative, Average Variable Interest Rate
Other comprehensive income/(loss), pre-tax activity
OCI, before Reclassifications, before Tax, Attributable to Parent
Senior notes, due various dates through June 2037
Senior Notes, Due Various Dates Through June 2037 [Member]
Senior Notes, Due Various Dates Through June 2037
Savings
Deposits, Savings Deposits
Schedule of Segment Reporting Information
Segment Reporting [Table Text Block]
Depositary Share, 1/40th Series I Perpetual Preferred Stock
Depositary Share, Series I Preferred Stock [Member]
Depositary Share, Series I Preferred Stock
Schedule of Preferred Stock Activity
Schedule Of Preferred Stock Activity [Table Text Block]
Schedule Of Preferred Stock Activity
Assets Pledged
Collateral
Securities Loaned, Fair Value of Collateral
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
TOTAL OTHER COMPREHENSIVE (LOSS) / INCOME, NET OF TAX
Net Activity
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Derivate liability, statement of financial position, extensible enumeration not disclosed flag
Derivative Liability, Statement Of Financial Position, Extensible Enumeration Not Disclosed Flag
Derivative Liability, Statement Of Financial Position, Extensible Enumeration Not Disclosed Flag
NON-CASH TRANSACTIONS
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Due after 1 year but within 5 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
ALLL
ALLL, beginning of period
ALLL, end of period
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Document Period End Date
Document Period End Date
Preferred stock, shares outstanding (in shares)
Preferred Stock, Shares Outstanding
Federal tax assets
Deferred Tax Assets, Federal Taxes
Deferred Tax Assets, Federal Taxes
Debt issued
Debt Instrument, Face Amount
Gross amounts offset on the condensed consolidated balance sheets
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Liability Offset
Effective Rate
Initial Weighted Average Interest Rate Range
Debt Instrument, Interest Rate, Effective Percentage
Net amounts of assets included on the Condensed Consolidated Balance Sheets
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, after Offset
OPERATING LEASE ASSETS, NET
Lessor, Operating Leases [Text Block]
Due after 10 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10
Securities sold under agreements to repurchase
Securities Sold under Agreements to Repurchase
SUPPLEMENTAL CASH FLOW INFORMATION
Cash Flow, Supplemental Disclosures [Text Block]
Total other comprehensive income/(loss), tax effect
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Accumulated other comprehensive loss, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Entity Shell Company
Entity Shell Company
Consolidation Items [Domain]
Consolidation Items [Domain]
% of Total Class of Financing Receivable
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage
Tax settlement, amount
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount
LIHTC investments
Low Income Housing Tax Credit Investment
Low Income Housing Tax Credit Investment
Gain / (Loss) on non-mortgage loans, net
Gain (Loss) on Sales of Consumer Loans
Offsetting Liabilities [Line Items]
Offsetting Liabilities [Line Items]
Document Fiscal Period Focus
Document Fiscal Period Focus
Total derivatives not subject to a master netting arrangement or similar arrangement
Derivative Asset, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Asset, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Lease income
Lease income
Lease Income
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
TOTAL LIABILITIES
Liabilities
Liabilities
Trading securities
Debt Securities, Trading, and Equity Securities, FV-NI
Trading Symbol
Trading Symbol
Discount rate
Measurement Input, Discount Rate [Member]
AFS at fair value (amortized cost of $10,506 and $7,956 as of September 30, 2026 and December 31, 2025, respectively)
Fair Value
Total
Investment in debt securities AFS
Debt Securities, Available-for-Sale, Excluding Accrued Interest
Allowance for Loan Losses [Roll Forward]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss [Line Items]
Common stock issued (in shares)
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share
Schedule of Fair Values of the Assets and Liabilities
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Company Selected Measure Name
Company Selected Measure Name
Gain / (losses) in OCI
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)
Transaction [Domain]
Transaction [Domain]
Purchases of AFS investment securities
Payments to Acquire Debt Securities, Available-for-Sale
Accrued legal and regulatory liabilities
Accrued Legal And Regulatory Liability
Accrued Legal And Regulatory Liability
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Reclassification adjustment, pre-tax activity
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Interest-bearing demand deposits (as a percent)
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Demand
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Demand
Deposits and other customer accounts
Interest Expense, Deposits
Offsetting Liabilities [Table]
Offsetting Liabilities [Table]
Intangible Asset, Indefinite-Lived [Table]
Intangible Asset, Indefinite-Lived [Table]
Due after 1 year but within 5 years
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Current Fiscal Year
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year
Equity securities, cost
Equity Securities, FV-NI, Cost
Proceeds from the sale and termination of operating leases
Proceeds from Sale, Lease, Held-for-Investment
Credit Facility [Domain]
Credit Facility [Domain]
CASH FLOWS FROM OPERATING ACTIVITIES:
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Sensitivity analysis of fair value, impact of 10 percent adverse change in discount rate, increase (decrease)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets
Derivative Asset, Subject To Master Netting Arrangement, After Offset
Derivative Asset, Subject To Master Netting Arrangement, After Offset
Interest rate swaps - AFS
Interest Rate Swap - AFS [Member]
Interest Rate Swap - AFS
Intangible Asset, Indefinite-Lived [Line Items]
Intangible Asset, Indefinite-Lived [Line Items]
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Less: Fair value of net assets acquired
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)
Transfers from level 3
Transfers from Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Advance payments by borrowers for taxes and insurance
Advance Payments by Borrowers for Taxes and Insurance
Dividends declared and payable to shareholder
Dividends
Schedule of 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]
U.S. Treasury securities
U.S. Treasury
US Treasury Securities [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified [Line Items]
Number of payments required to be eligible for deferred payment
Financing Receivable, Excluding Accrued Interest, Number Of Payments Required To Be Eligible For Deferred Payment
Financing Receivable, Excluding Accrued Interest, Number Of Payments Required To Be Eligible For Deferred Payment
Commitments to extend credit
Commitments to extend credit
Commitments to Extend Credit [Member]
Fair value recurring basis, unobservable input reconciliation, net derivative asset (liability) gain (loss), statement of income extensible list not disclosed flag
Fair Value Recurring Basis, Unobservable Input Reconciliation, Net Derivative Asset (Liability) Gain (Loss), Statement Of Income Extensible List Not Disclosed Flag
Fair Value Recurring Basis, Unobservable Input Reconciliation, Net Derivative Asset (Liability) Gain (Loss), Statement Of Income Extensible List Not Disclosed Flag
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Parent Company and Subsidiaries
Parent Company and Other IHC Entities [Member]
Parent Company and Other IHC Entities [Member]
Schedule of Rollforward for Assets and Liabilities Measured at Fair Value on a Recurring Basis
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Other expenses
Other General and Administrative Expense
CBB
Consumer and Business Banking Segment [Member]
Consumer and Business Banking Segment [Member]
Award Timing Predetermined
Award Timing Predetermined [Flag]
Net realized losses on AFS and other securities
Debt Securities, Gain (Loss)
INTEREST INCOME:
Interest and Dividend Income, Operating [Abstract]
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Level 1
Fair Value, Inputs, Level 1 [Member]
Revolving Credit Facilities with Third Parties
Revolving Credit Facilities With Third Parties [Member]
Revolving Credit Facilities With Third Parties
Effective income tax rate reconciliation (as a percent)
Effective Income Tax Rate Reconciliation, Percent
Gross amounts of recognized assets, total derivative assets
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement
Corporate debt securities
Debt Securities, Available-for-Sale [Abstract]
Gross amounts of recognized liabilities
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Including Not Subject to Master Netting Arrangement
Class of Financing Receivable [Axis]
Class of Financing Receivable [Axis]
Class of Financing Receivable [Axis]
Clean-up call
Clean Up Call [Member]
Clean Up Call
Agency MBS
Residential Mortgage-Backed Securities [Member]
Pledged against repurchase agreements and supported hedging relationships, recourse on loans, and other agreements
Repurchase Agreements, Hedging Activities, And Loan Sales [Member]
Repurchase Agreements, Hedging Activities, And Loan Sales
No FICO
No FICO Score [Member]
No FICO Score [Member]
Operating lease ROU assets
Operating Lease, Right-of-Use Asset
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Offsetting Assets [Table]
Offsetting Assets [Table]
Money market (as a percent)
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Money Market
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Money Market
Due within one year
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Core deposit intangibles - workers comp administration funds
Core Deposits, Workers Comp Administration Funds [Member]
Core Deposits, Workers Comp Administration Funds
INVESTMENT SECURITIES
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Balance
Initial Note Amounts Issued
Lines of credit outstanding
Long-Term Line of Credit
Restricted Cash Pledged
Restricted Cash
Pledged Restricted Cash Separately Reported Securities Pledged Under Letter Of Credit Facilities At Fair Value
Pledged Restricted Cash Separately Reported Securities Pledged Under Letter Of Credit Facilities At Fair Value
Expiration Date
Trading Arrangement Expiration Date
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Total deposits (as a percent)
Percentage Of Interest-bearing Deposit Liabilities To Deposit
Percentage Of Interest-bearing Deposit Liabilities To Deposit
Schedule of Gross Amounts of Liabilities Associated with Securities Financing Activities by Remaining Contractual Maturity and by Class of Underlying Collateral
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]
CLNs, due various dates through February 2052
Credit-Linked Notes Due Various Dates Through February 2052 [Member]
Credit-Linked Notes Due Various Dates Through February 2052
Gross Unrealized Gains
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain
Fair Value
Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract]
Gross amounts not offset in the condensed consolidated balance sheets, financial instruments
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Cash, cash equivalents, and restricted cash
Cash and Cash Equivalents, Fair Value Disclosure
Gross amounts not offset in the condensed consolidated balance sheets, net amount
Derivative Asset, Subject to Master Netting Arrangement, after Offset and Deduction
Reserve for PCD loans purchased at acquisition date
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date
Subordinated Debt
Subordinated Debt [Member]
Additions/Issuances
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances
Estimate of possible loss (up to)
Loss Contingency, Estimate of Possible Loss
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Derivative [Table]
Derivative [Table]
SC
Santander Consumer [Member]
Santander Consumer [Member]
SHUSA
SHUSA [Member]
SHUSA
Interest-bearing demand deposits
Interest-Bearing Deposit Liabilities
Deposits
Deposits, Fair Value Disclosure
LHFS
Fair Value, Option, Aggregate Differences, Loans and Long-Term Receivables
600-639
FICO Score of 600 to 639 [Member]
FICO Score of 600 to 639 [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Net income
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax
2027
Lessor, Operating Lease, Payment to be Received, Year One
Segments [Domain]
Segments [Domain]
Securities loaned or sold under agreements to repurchase not subject to master netting
Securities Loaned and Securities Sold under Agreement to Repurchase, Not Subject to Master Netting Arrangement [Abstract]
Securities Loaned and Securities Sold under Agreement to Repurchase, Not Subject to Master Netting Arrangement
Interest rate swap agreements
Interest rate swaps
Interest Rate Swap [Member]
BORROWINGS
Debt Disclosure [Text Block]
Total commitments
Contractual Obligation
Amortized cost basis, net of allowance
Financing Receivable, after Allowance for Credit Loss
SECURITIES FINANCING ACTIVITIES
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]
RICs and auto loans
RICs and auto loans
Retail Installment Contracts And Auto Loans [Member]
Retail Installment Contracts and Auto Loans [Member]
Business Combination [Table]
Business Combination [Table]
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
LHFS
Loans Held-for-sale, Unpaid Principal Balance
Unpaid principal balance of loans held-for-sale.
Interest income on trading accounts
Interest Income Expense Trading Account Securities
Interest Income Expense Trading Account Securities
LHFS
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance
Fair Value
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Stated interest rate
Debt Instrument, Interest Rate, Stated Percentage
Dividends paid on common stock
Dividends paid on common stock
Dividends, Common Stock, Cash
TOTAL STOCKHOLDER'S EQUITY
Beginning Balance
Ending Balance
Equity, Attributable to Parent
Total securities loaned or sold under agreements to repurchase subject to master netting
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, before Offset
Total securities loaned or sold under agreements to repurchase subject to master netting
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
All other assets
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent
Securities or Other Assets Sold under Agreements to Repurchase [Axis]
Securities or Other Assets Sold under Agreements to Repurchase [Axis]
Offsetting Assets [Line Items]
Offsetting Assets [Line Items]
ASSETS
Assets
Assets [Abstract]
Payment Deferral Only
Payment Deferral [Member]
Other investments
Total
Other Investments
Schedule of Commercial Lending Asset Quality Indicators and Consumer Lending Asset Quality Indicators-Credit Score
Financing Receivable Credit Quality Indicators [Table Text Block]
Nonrecurring
Fair Value, Nonrecurring [Member]
Insider Trading Policies and Procedures [Line Items]
Nonperforming
Nonperforming Financial Instruments [Member]
RICs HFI
Fair Value, Option, Loans Held as Assets, Aggregate Difference
Gross amounts of recognized assets
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, before Offset
Other commercial
Remaining commercial
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]
Deferred tax expense / (benefit)
Deferred Income Tax Expense (Benefit)
Year Four
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable Portfolio Segment [Domain]
Financing Receivable Portfolio Segment [Domain]
Unobservable inputs
Servicing Asset, Measurement Input
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral pledged
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Senior Notes Due 2030
Senior Notes Due 2030 [Member]
Senior Notes Due 2030
Schedule of Goodwill by Reporting Units
Goodwill [Table Text Block]
Entity Central Index Key
Entity Central Index Key
NET INTEREST INCOME AFTER CREDIT LOSS EXPENSE
Interest Income (Expense), after Provision for Loan Loss
Asset and wealth management fees
Asset And Wealth Management Fees [Member]
Asset And Wealth Management Fees [Member]
Pay variable - receive fixed interest rate swaps
Pay variable receive-fixed interest rate swap
Interest Rate Swaps, Pay Variable, Receive Fixed [Member]
Interest Rate Swaps, Pay Variable, Receive Fixed [Member]
Equity [Abstract]
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Purchases and sales of premises, equipment, and real estate owned, net
Purchases And Sales Of Premises And Equipment, Net
Purchases And Sales Of Premises And Equipment, Net
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, after Offset and Deduction
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, after Offset and Deduction
Net amount of change recognized in OCI for cash flow hedge derivatives, gains (losses)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Fair Value
Fair Value, Option, Loans Held as Assets [Abstract]
Net interest income
Business Combination, Pro Forma Information, Pro Forma, Interest Income (Expense), Operating
Business Combination, Pro Forma Information, Pro Forma, Interest Income (Expense), Operating
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Investment, Name [Axis]
Investment, Name [Axis]
Dividends paid on preferred stock
Dividends, Preferred Stock, Cash
Designated as hedging instrument
Designated as Hedging Instrument [Member]
Preferred stock, dividend rate, percentage
Preferred Stock, Dividend Rate, Percentage
Series G
Series G Preferred Stock [Member]
Personal unsecured loans
Personal Unsecured Loan [Member]
Personal Unsecured Loan [Member]
Pay fixed - receive variable interest rate swaps
Interest Rate Swaps, Pay Fixed, Receive Floating [Member]
Interest Rate Swaps, Pay Fixed, Receive Floating [Member]
Financing Receivable, Troubled Debt Restructuring [Table]
Financing Receivable, Modified [Table]
Basis spread (as a percent)
Debt Instrument, Basis Spread on Variable Rate
Schedule of Non-Interest Income
Schedule Of Non-Interest Income [Table Text Block]
Schedule Of Non-Interest Income [Table Text Block]
Non-accrual loans with no related allowance
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance
Total cash received from Trusts
Proceeds from Accounts Receivable Securitization
Accumulated Other Comprehensive Loss, Net of Tax
Accumulated other comprehensive loss, net of tax
AOCI Attributable to Parent [Member]
All Individuals
All Individuals [Member]
Carrying Amount of Hedged Item
Hedged Asset, Fair Value Hedge
Dividends paid on common stock and preferred stock
Dividends paid on common stock and preferred stock
Payments of Dividends
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Schedule of Gains and Losses From Investment and Trading Securities
Realized Gain (Loss) on Investments [Table Text Block]
Securities (losses) / gains, net
Debt and Equity Securities, Realized Gain (Loss)
Contribution from Parent Company
Noncash Transaction, Contribution From Parent
Noncash Transaction, Contribution From Parent
Securities lending
Securities Loaned
Proceeds from sales and maturities of equity method and other investments
Proceeds from Sale of Other Investments
Common stock issued
Business Combination, Consideration Transferred, Equity Interest
Statement [Line Items]
Statement [Line Items]
TOTAL ASSETS
Total assets
Assets
Transfer of financial interest in a VIE - Loans
Transfer of Financial Interest in a VIE, Loans
Transfer of Financial Interest in a VIE, Loans
Gross amounts offset in the condensed consolidated balance sheets, total derivative liabilities
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement, Asset Offset
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement, Asset Offset
Extended Maturity
Extended Maturity [Member]
TOTAL INTEREST EXPENSE
Interest expense
Interest Expense, Operating
Internal Credit Assessment [Domain]
Internal Credit Assessment [Domain]
Trading liabilities
Trading liabilities
Trading Liabilities
VIE, Not Primary Beneficiary
Variable Interest Entity, Not Primary Beneficiary [Member]
720-759
FICO Score of 720 to 759 [Member]
FICO Score of 720 to 759
Assets Sold under Agreements to Repurchase [Line Items]
Assets Sold under Agreements to Repurchase [Line Items]
Series F and G Preferred Stock
Series F and G Preferred Stock [Member]
Series F and G Preferred Stock
Reportable Segments
Operating Segments [Member]
Options for interest rate cap agreements
Option for Interest Rate Cap [Member]
Option for Interest Rate Cap [Member]
Schedule of Assets Sold under Agreements to Repurchase [Table]
Asset Sold under Agreement to Repurchase [Table]
Gross Unrealized Gains
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
FHLB advances, maturing through September 2039
Federal Home Loan Bank Advances Maturing Through April 2027 [Member]
Federal Home Loan Bank Advances Maturing Through April 2027
Total liabilities acquired
Business Combination, Recognized Liability Assumed, Liability
Other comprehensive income/(loss), net activity
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Occupancy and equipment expenses
Occupancy, Net
PEO
PEO [Member]
Non-interest-bearing demand deposits
Noninterest-Bearing Deposit Liabilities
Deferred taxes on purchase accounting fair value adjustments
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Taxes on Purchase Accounting Fair Value Adjustments
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Taxes on Purchase Accounting Fair Value Adjustments
Total
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed
Goodwill
Goodwill resulting from Santander's acquisition
Goodwill, beginning balance
Goodwill, ending balance
Goodwill
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Liability, total
Derivative Instruments in Hedges, Liabilities, at Fair Value
Gross amounts not offset in the condensed consolidated balance sheets, financial instruments, derivative liability subject to master netting
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
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
State tax assets
Deferred Tax Assets, State Taxes
(Accumulated Deficit) / Retained Earnings
Retained Earnings [Member]
Extended Maturity For Natural Disasters
Extended Maturity For Natural Disasters [Member]
Extended Maturity For Natural Disasters
Fair Value Measurements
Fair Value Measurement, Policy [Policy Text Block]
Floating Rate Senior Notes due August 2030
Floating Rate Senior Notes due August 2030 [Member]
Floating Rate Senior Notes due August 2030
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (in shares)
Beginning balance (in shares)
Ending balance (in shares)
Common Stock, Shares, Outstanding
Award Timing Disclosures [Line Items]
Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments
Fair Value, by Balance Sheet Grouping [Table Text Block]
Securities sold under agreements to repurchase
Offsetting Securities Sold under Agreements to Repurchase [Abstract]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due [Line Items]
Corporate and other securities
Corporate Debt Securities [Member]
Other
Other derivative activities
Other Contract [Member]
Internal Credit Assessment [Axis]
Internal Credit Assessment [Axis]
Foreclosed assets
Foreclosed Assets Measured At Fair Value
Foreclosed Assets Measured At Fair Value
5.22% Senior Notes Due June 2032
5.22% Senior Notes Due June 2032 [Member]
5.22% Senior Notes Due June 2032
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Litigation Case [Domain]
Litigation Case [Domain]
Structured LLC
Structured LLC [Member]
Structured LLC
Minimum annual revenue to service corporations
Minimum Annual Revenue To Service Corporation
Minimum Annual Revenue To Service Corporation
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived [Line Items]
Year Four
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year
Equity Investments
Equity Securities, Investment Summary [Member]
Schedule of Securities Financing Assets Qualified for Offset
Schedule of Financial Assets Eligible for Offset
Offsetting Assets [Table Text Block]
Greater than 110%
LTV Greater Than 110% [Member]
LTV greater than 110% [Member]
Total assets acquired
Business Combination, Recognized Asset Acquired, Asset
Amount
Intangible Asset, Finite-Lived, Acquired
In-scope of revenue from contracts with customers
Revenue from Contract with Customer, Excluding Assessed Tax
Reclassification adjustment, tax effect
Reclassification from AOCI, Current Period, Tax
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, after Offset and Deduction
Schedule of Carrying Value of Investment Securities Pledged as Collateral
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]
Proceeds from sale of residual interest in VIE
Proceeds from Sale of Residual Interest in VIE
Proceeds from Sale of Residual Interest in VIE
Repayments of long-term borrowings
Repayments of Other Long-Term Debt
Financial assets:
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Allowance for credit losses at acquisition
Financing Receivable, Allowance for Credit Loss
Beneficial interest in Structured LLC
Beneficial Interest In Structured LLC [Member]
Beneficial Interest In Structured LLC
5.70% Senior Notes Due June 2037
5.70% Senior Notes Due June 2037 [Member]
5.70% Senior Notes Due June 2037
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, after Offset and Deduction
Gross amounts not offset in the condensed consolidated balance sheets, net amount, total derivative liability
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
CLNs due January 2039
Credit-Linked Notes Due January 2039 [Member]
Credit-Linked Notes Due January 2039
Other real estate owned and other repossessed assets
Other Real Estate Owned And Other Repossessed Assets
Other Real Estate Owned And Other Repossessed Assets
On-balance sheet securitization transaction
On-Balance Sheet Securitization Transaction
On-Balance Sheet Securitization Transaction
ABS and other interests in structured securities
Asset-Backed Securities (ABS) And Other Interest In Structured Securities [Member]
Asset-Backed Securities (ABS) And Other Interest In Structured Securities
Underwriting service fees
Underwriting Service Fees [Member]
Underwriting Service Fees [Member]
Gross amounts not offset in the condensed consolidated balance sheets, financial instruments, total derivative liability
Derivative Liability, Including Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Liability, Including Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Securities borrowed and lent
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount
Interest expense on federal funds purchased and securities loaned or sold under repurchase agreements
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase
Common stock shares issued not disclosed
Common Stock Shares Issued Not Disclosed
Common Stock Shares Issued Not Disclosed
Debt-to-Value [Domain]
Debt-to-Value [Domain]
5.04% Senior Notes Due June 2030
5.04% Senior Notes Due June 2030 [Member]
5.04% Senior Notes Due June 2030
Gain (loss) recognized on derivatives
Derivative, Gain (Loss) on Derivative, Net
Pledged against public fund deposits
Public Fund Deposits [Member]
Public Fund Deposits [Member]
Trading securities and trading liabilities, net
Increase (Decrease) In Trading Securities And Trading Liabilities, Net
Increase (Decrease) In Trading Securities And Trading Liabilities, Net
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, after Offset
Pledged against borrowing capacity with the FHLB
Collateral with Federal Home Loan Bank [Member]
Collateral with Federal Home Loan Bank
Gross realized losses
Debt Securities, Realized Loss
Debt Securities, Realized Loss
Vehicles
Vehicles [Member]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Equity Securities
Equity Securities [Member]
Revolving Loans
Financing Receivable, Excluding Accrued Interest, Revolving
Operating lease, right-of-use asset, statement of financial position [extensible enumeration]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Schedule of Activity in ACL by Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Table Text Block]
Balances, beginning of period
Balances, end of period
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Off-balance Securitization Trusts
Off-balance Securitization Trusts [Member]
Off-balance Securitization Trusts [Member]
Due within one year
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One
Federal funds purchased and securities loaned or sold under repurchase agreements
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Fed Funds Purchased and Securities Loaned or Sold Under Repurchase Agreements
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Fed Funds Purchased and Securities Loaned or Sold Under Repurchase Agreements
CPR
Measurement Input, Constant Prepayment Rate [Member]
Cash received for servicing fees
Cash Flows Between Transferor and Transferee, Servicing Fees
OTHER ASSETS
Other Assets Disclosure [Text Block]
Gross amounts of recognized assets
Security Borrowed, Subject to Master Netting Arrangement, before Offset
Stellantis relationship NV
Stellantis Relationship [Member]
Stellantis Relationship
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
CIB
CIB
CIB Segment [Member]
CIB Segment [Member]
Series I Preferred Stock
Series I Preferred Stock [Member]
Series I Preferred Stock
12 months or longer
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)
Comprehensive Income (Loss) Note [Text Block]
680-759
FICO Score Of 680 To 759 [Member]
FICO Score Of 680 to 759 [Member]
Product and Service [Domain]
Product and Service [Domain]
Net amounts
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, after Offset and Deduction
Exchange of Webster Series F and G preferred stock for SHUSA Series H and I preferred stock
Noncash or Part Noncash Acquisition, Preferred Shares Acquired
Noncash or Part Noncash Acquisition, Preferred Shares Acquired
Due after 1 year but within 5 years
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Commitments that can be canceled without notice
Commitments, Can Be Canceled Without Notice
Commitments, Can Be Canceled Without Notice
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Variable Interest Entity [Line Items]
Variable Interest Entity [Line Items]
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Amortized Cost
Financing Receivable, Modified, Subsequent Default
Fair value adjustment
Assets, Fair Value Adjustment
Termination Date
Trading Arrangement Termination Date
Other Commitments [Axis]
Other Commitments [Axis]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Total derivatives not subject to a master netting arrangement or similar arrangement
Derivative Asset, Not Subject to Master Netting Arrangement
Other intangible assets
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Gross amounts not offset in the condensed consolidated balance sheets, net amount, total derivative assets, net amount
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Short-term borrowing due within one year, maturing through December 2026
Short-Term Borrowings Due September 2026 [Member]
Short-Term Borrowings Due September 2026
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral pledged
Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Total serviced for other portfolio
Gross Retail Installment Contracts, Value Transferred
Gross Retail Installment Contracts, Value Transferred
Total
Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement [Abstract]
600-679
FICO Score Of 600 To 679 [Member]
FICO Score of 600 to 679 [Member]
Discount spread
Measurement Input Discount Spread [Member]
Measurement Input Discount Spread
Fair Value as of Grant Date
Award Grant Date Fair Value
Schedule of Aggregate Amount of Unrealized Losses on Debt Securities in AFS Investment Portfolios
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Net gain on sale or disposal of loans, investment securities, and other assets
Gain (Loss) on Disposition of Assets
Schedule of Goodwill [Table]
Goodwill [Table]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Preferred Stock Mezzanine
Increase (Decrease) in Temporary Equity [Roll Forward]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Arrangement Duration
Trading Arrangement Duration
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral pledged
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Net adjustment in loan balances
Financing Receivable, Unamortized Loan Cost (Fee) and Purchase Premium (Discount)
Consolidation Items [Axis]
Consolidation Items [Axis]
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral pledged
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Entity Registrant Name
Entity Registrant Name
Less than 12 months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Amortized Cost
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Debt securities, available-for-sale, accrued interest writeoff
Debt Securities, Available-for-Sale, Accrued Interest Writeoff
Loan Restructuring Modification [Axis]
Loan Restructuring Modification [Axis]
Webster preferred shares, Series F and G, redeemed
Stock Redeemed During Period, Value
Stock Redeemed During Period, Value
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Intangible Asset, Finite-Lived, Class [Domain]
Intangible Asset, Finite-Lived, Class [Domain]
Trade names
Trade Names [Member]
Preferred stock (no par value; 7,500,000 shares authorized; 2,500,000 and 2,000,000 shares outstanding at September 30, 2026 and December 31, 2025, respectively)
Preferred stock mezzanine, beginning balance
Preferred stock mezzanine, ending balance
Temporary Equity, Carrying Amount, Attributable to Parent
Commercial Banking
Commercial Banking [Member]
Commercial Banking
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
All Award Types
Award Type [Domain]
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Security Loaned, Subject to Master Netting Arrangement, after Offset and Deduction
Fair value of derivatives with credit risk contingent features
Derivative, Net Liability Position, Aggregate Fair Value
FAIR VALUE
Fair Value Disclosures [Text Block]
Multiples of revenue
Measurement Input, Revenue Multiple [Member]
Level 3
Fair Value, Inputs, Level 3 [Member]
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date [Abstract]
Asset Pledged as Collateral
Asset Pledged as Collateral [Member]
Schedule of Aggregate Amount of Unrealized Losses on Debt Securities in HTM Investment Portfolios
Held-To-Maturity Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]
Transaction Type [Axis]
Transaction Type [Axis]
Schedule of Other Investments
Schedule Of Other Investments [Table Text Block]
Schedule Of Other Investments [Table Text Block]
Non-cash transfer of financial assets in an off-balance sheet securitization transaction
Transfer Of Financial Assets In A Off-Balance Sheet Securitization Transaction, Non-Cash
Transfer Of Financial Assets In A Off-Balance Sheet Securitization Transaction, Non-Cash
Revolving Credit Facility With Related Parties
Revolving Credit Facilites With Related Parties [Member]
Revolving Credit Facilites With Related Parties
Restricted cash
Restricted Cash
Total
Lessor, Operating Lease, Payment to be Received
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest
Home equity loans and lines of credit
Home equity
Home Equity Line of Credit [Member]
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Excluding Accrued Interest [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Excluding Accrued Interest
Other assets
Various other assets
Total Other assets
Other Assets
Current Fiscal Year
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Excluding Loans Held for Sale
Gross amounts offset on the condensed consolidated balance sheets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Liability Offset
Legal Entity [Axis]
Legal Entity [Axis]
Schedule of Payment Defaults of Prior Modification
Financing Receivable, Modified, Subsequent Default [Table Text Block]
Up to 30 days
Maturity Less than 30 Days [Member]
NON-INTEREST INCOME:
Non-interest income:
Noninterest Income [Abstract]
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral pledged, derivative liability subject to master netting
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Schedule of Finite-Lived Intangible Assets [Table]
Intangible Asset, Finite-Lived [Table]
Non-NEOs
Non-NEOs [Member]
Cash paid
Payments to Acquire Businesses, Gross
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items]
Schedule of Parent Company and Other Subsidiary Borrowings and Debt Obligations, Warehouse Lines and Secured Structured Financings
Schedule of Debt [Table Text Block]
Investment, Name [Domain]
Investment, Name [Domain]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Due after 5 years but within 10 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
MBS
Collateralized Mortgage-Backed Securities [Member]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
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]
Schedule of Gains (Losses) on All Derivatives
Derivative Instruments, Gain (Loss) [Table Text Block]
Award Type
Award Type [Axis]
2026
Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Unsettled sales of investment securities
Accrual Of Investment Securities Sold
Accrual Of Investment Securities Sold
Amortized cost
Amortized Cost
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss
Assets Sold under Agreements to Repurchase, Type [Domain]
Assets Sold under Agreements to Repurchase, Type [Domain]
Retained earnings (accumulated deficit)
Retained Earnings (Accumulated Deficit)
Multifamily loans
Multifamily
Multi-Family Commercial Loans [Member]
Multi-Family Commercial Loans [Member]
Consumer:
Consumer
Consumer Portfolio Segment [Member]
Product and Service [Axis]
Product and Service [Axis]
Equity securities
Equity and other investments
Equity Securities, FV-NI
Total OREO and other repossessed assets
Repossessed Assets
Borrowings and other debt obligations
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings and Other Debt Obligations
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings and Other Debt Obligations
FDIC
FDIC [Member]
FDIC
Net unrealized changes in cash flow hedge derivative financial instruments, net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent
Year Five
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Excluding Loans Held for Sale
Schedule of Securities Borrowed and Purchased Under Agreements to Resell and Securities Loaned or Sold Under Agreements to Repurchase
Schedule of Securities Financing Transactions [Table Text Block]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Schedule of Cash Flows Received from Consolidated Trusts
Schedule Of Cash Flows Between Transferor And Transferee [Table Text Block]
Schedule of Cash Flows Between Transferor and Transferee [Table Text Block]
Common Stock
Common Stock [Member]
Debt instrument, reference pool
Debt Instrument, Reference Pool
Debt Instrument, Reference Pool
Debt securities, held-to-maturity, accrued interest, writeoff
Debt Securities, Held-to-Maturity, Accrued Interest, Writeoff
Year Five
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff
Other revenue from contracts with customers
Other Products And Servi [Member]
Other Products And Servi [Member]
TOTAL FEES AND OTHER INCOME
Fees And Other Income
Total fees and other income.
Loss estimate
Measurement Input, Loss Severity [Member]
Derivative Contract [Domain]
Derivative Contract [Domain]
Marine and RV contracts
Marine And RV Contracts [Member]
Marine And RV Contracts [Member]
Total Past Due
Financial Asset, Past Due [Member]
Derivatives, net
Derivative Financial Instruments, Assets [Member]
TOTAL LIABILITIES, MEZZANINE AND STOCKHOLDER'S EQUITY
Liabilities and Equity
FRB stock purchased at par
Payments to Acquire Federal Reserve Bank Stock
Securities (losses) / gains, net
Securities gains / (losses), net
Realized Investment Gains (Losses)
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Segments [Axis]
Segments [Axis]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Asset Class [Axis]
Asset Class [Axis]
Schedule of Carrying Amount and Fair Value Hedge Adjustment of Hedged Assets
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Interest expense on trading liabilities
Interest Expense, Trading Liabilities
Trading securities
Debt Securities, Trading
Customer repurchase accounts
Deposits, Customer Repurchase Accounts
Deposits, Customer Repurchase Accounts
Tabular List, Table
Tabular List [Table Text Block]
Other Derivative Activities
Other Derivative Activities [Member]
Other Derivative Activities
Purchases of HTM investment securities
Payments to Acquire Held-to-Maturity Securities
Interest-bearing deposits with an affiliate bank
Deposits Assets
Impaired LHFI
Impaired Loans Held for Investment [Member]
Impaired Loans Held for Investment [Member]
Miscellaneous income, net
Other Operating Income (Expense), Net
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, After Offset
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, After Offset
Debt-to-Value [Axis]
Debt-to-Value [Axis]
Valuation, Market Approach
Valuation, Market Approach [Member]
Property, Plant and Equipment, Type [Domain]
Long-Lived Asset, Class [Domain]
CLNs Due July 2034
Credit-Linked Notes Due July 2034 [Member]
Credit-Linked Notes Due July 2034
Financing Receivable Portfolio Segment [Axis]
Financing Receivable Portfolio Segment [Axis]
Loans transferred to/(from) OREO and other repossessed assets
Real Estate Owned, Transfer to Real Estate Owned
All Other Modifications
All other modification types
All Other Modifications [Member]
All Other Modifications
Preferred stock (no par value; 7,500,000 shares authorized; 141,000 and zero shares outstanding at September 30, 2026 and December 31, 2025, respectively)
Preferred Stock, Value, Issued
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Transfers from Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3
Reclassification of gains from AOCI
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Weighted Average Pay Rate
Derivative, Average Fixed Interest Rate
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Liability
Interest Rate Cash Flow Hedge Liability at Fair Value
Hedging Designation [Axis]
Hedging Designation [Axis]
Total equity securities gains / (losses)
Equity Securities, Gain (Loss)
Equity Securities, Gain (Loss)
Credit Facility [Axis]
Credit Facility [Axis]
Total financial assets valued at fair value on a non-recurring basis
Assets, Fair Value Disclosure
Pay fixed-receive variable interest rate swaps
Interest Rate Swaps, Pay Fixed, Receive Variable [Member]
Interest Rate Swaps, Pay Fixed, Receive Variable [Member]
Acquisition of interest in limited partnership
Payments to Acquire Limited Partnership Interests
Mortgage banking derivatives
Mortgage Banking Derivatives [Member]
Mortgage banking derivatives
Assets securitized
Receivables Securitized
Receivables Securitized
Name
Measure Name
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral received
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Pay vs Performance Disclosure [Line Items]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Asset derivatives Fair value
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value
Debt
Debt [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
BOLI
Other Assets, Bank Owned Life Insurance Income
Other Assets, Bank Owned Life Insurance Income
Loans
Interest and Fee Income, Financing Receivable
Interest rate swaps, caps, and options
Interest Rate Swaps, Caps, And Options [Member]
Interest Rate Swaps, Caps, And Options
Intangible Asset, Indefinite-Lived, Class [Axis]
Intangible Asset, Indefinite-Lived, Class [Axis]
Privately issued amortizing notes maturing on various dates through August 2030
Privately Issued Amortizing Notes due on Various Dates Through August 2030 [Member]
Privately Issued Amortizing Notes due on Various Dates [Member]
Purchases of LHFI
Payment for Acquisition, Loan, Held-for-Investment
Total out-of-scope of revenue from contracts with customers
Revenue Not from Contract with Customer
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
Accrued interest receivable
Interest Receivable
C&I
Commercial And Industrial Segment [Member]
Commercial And Industrial Segment [Member]
Name
Trading Arrangement, Individual Name
Cash, cash equivalents, and restricted cash
Cash and Cash Equivalent
Unallocated fair value hedge basis adjustment
Unallocated FV Hedge Basis Adjustment [Member]
Unallocated FV Hedge Basis Adjustment
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, total derivative assets, cash collateral received
Derivative Asset, Including Not Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Derivative Asset, Including Not Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Company Selected Measure Amount
Company Selected Measure Amount
Trading Securities
Trading Securities [Member]
Trading Securities
Series F
Series F Preferred Stock [Member]
Income tax receivables
Income Taxes Receivable
Depreciation, amortization and accretion
Depreciation, Depletion and Amortization
Gross amounts of recognized liabilities
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset
Receivables securitized
Sales Of Receivables Securitization Excluding Impacts Of Noncash Deconsolidation Transaction
Sales Of Receivables Securitization Excluding Impacts Of Noncash Deconsolidation Transaction
Preferred Stock, Redemption Amount
Preferred Stock, Redemption Amount
Schedule of Loans Receivables [Table]
Accounts and Financing Receivables [Table]
Equity securities, measurement input
Equity Securities, FV-NI, Measurement Input
Derivative assets at fair value
Derivative Asset Including Certain Collateral Netting Adjustments
Derivative Asset Including Certain Collateral Netting Adjustments
Non-PEO NEO
Non-PEO NEO [Member]
Net distributions from trusts
Distributions Received From Variable Interest Entity
Distributions Received From Variable Interest Entity
Swaps receive fixed
Interest Rate Swaps, Receive Fixed [Member]
Interest rate swaps, receive fixed.
LHFS
Fair Value, Option, Loans Held for Sale, Aggregate Amount
Fair Value, Option, Loans Held for Sale, Aggregate Amount
TBA MBS forwards
TBA MBS Forwards [Member]
TBA MBS Forwards
Award Timing Method
Award Timing Method [Text Block]
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Miscellaneous income, net
Miscellaneous Income, Net
Miscellaneous Income, Net
Customer relationships and other intangibles
Customer Relationships And Other Intangibles [Member]
Customer Relationships And Other Intangibles
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
2028
Lessor, Operating Lease, Payment to be Received, Year Two
Other assets
Increase (Decrease) In Other Assets And Bank Owned Life Insurance
Other assets and bank owned life insurance.
NET INCOME
NET INCOME
Net income
Net Income (Loss) Attributable to Parent
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Loans held for investment with fixed rate of interest
Loans Receivable with Fixed Rates of Interest
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Swaps pay fixed
Interest Rate Swaps, Pay Fixed [Member]
Interest rate swaps, pay fixed
Financing Receivable, Past Due [Table]
Financing Receivable, Past Due [Table]
Restatement Determination Date:
Restatement Determination Date [Axis]
Schedule of Components of AOCI / (Loss), Net of Related Tax
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Fair value of liabilities:
Business Combination, Recognized Liability Assumed, Liability [Abstract]
Litigation settlement, amount awarded to other party
Litigation Settlement, Amount Awarded to Other Party
Total, percent
Financing Receivable, Excluding Accrued Interest, Before Allowance for Credit Loss, Percent
Financing Receivable, Excluding Accrued Interest, Before Allowance for Credit Loss, Percent
Number of deferred payments allowed
Financing Receivable, Excluding Accrued Interest, Number Of Deferred Payments Allowed
Financing Receivable, Excluding Accrued Interest, Number Of Deferred Payments Allowed
Financing receivable, loans sold
Financing Receivable, Sale
Auto
Auto [Member]
Auto
Schedule of Other Assets
Schedule of Other Assets [Table Text Block]
Gross amounts offset on the condensed consolidated balance sheets
Security Loaned, Subject to Master Netting Arrangement, Asset Offset
Collateral posted
Collateral Already Posted, Aggregate Fair Value
MEZZANINE EQUITY
Temporary Equity [Abstract]
Other miscellaneous income/(loss), net
Miscellaneous Income (Loss)
Miscellaneous Income (Loss)
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Document Fiscal Year Focus
Document Fiscal Year Focus
Gross amounts offset in the condensed consolidated balance sheets
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset
Difference
Fair Value, Option, Aggregate Differences [Abstract]
Asset and wealth management fees
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions
Deposits and other customer accounts
Total deposits
Deposits
Common stock and paid-in capital (no par value; 800,000,000 shares authorized; 530,391,043 shares outstanding at both September 30, 2026 and December 31, 2025, respectively)
Common Stock, Value, Issued
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral pledged, derivative liability not subject to master netting
Derivative Liability, Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Derivative Liability, Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Securities borrowed
Securities Borrowed
Restatement Determination Date
Restatement Determination Date
Public securitizations maturing on various dates through May 2034
Public Securitizations due on Various Dates Through May 2034 [Member]
Public Securitizations due on Various Dates [Member]
Secured structured financings, maturing through May 2034
Secured Structured Financings Maturing Through May 2034 [Member]
Secured Structured Financings Maturing Through May 2034
Decrease in deferred tax asset, net
Increase (Decrease) In Deferred Tax Asset, Net
Increase (Decrease) In Deferred Tax Asset, Net
Plus: Preferred stock acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Preferred Stock Acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Preferred Stock Acquired
Amendment Flag
Amendment Flag
Goodwill [Line Items]
Goodwill [Line Items]
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral pledged, total derivative liability
Derivative Liability, Including Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Derivative Liability, Including Not Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Liquidity discount
Measurement Input Liquidity Discount [Member]
Measurement Input Liquidity Discount
Preferred stock, redemption price per share (in dollars per share)
Preferred Stock, Redemption Price Per Share
Gross amounts of recognized liabilities
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, Before Offset
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, Before Offset
Gross Unrealized Loss
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Schedule of Amortized Cost, Gross Unrealized Gains and Losses and Fair Values of Investments in Debt Securities, AFS
Debt Securities, Available-for-Sale [Table Text Block]
Loss Contingencies [Table]
Loss Contingencies [Table]
Investments [Domain]
Investments [Domain]
Originations and purchases of LHFS
Payment for Origination, Loan, Mortgage, Held-for-Sale
Principal Balance
Fair Value Option, Principal Balance [Abstract]
Fair Value Option, Aggregate Unpaid Principal Balance [Abstract]
FHLB and FRB stock
Federal Home Loan Bank Stock and Federal Reserve Bank Stock
SHUSA Preferred shares, Series H and I issued
Stock Issued During Period, Value, Acquisitions
Basis in leased vehicles
Property, Plant, and Equipment, Lessor Asset under Operating Lease, before Accumulated Depreciation
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Transfers from Level 2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Gross amounts offset on the Condensed Consolidated Balance Sheets
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Including Subject to Master Netting Arrangement, Asset Offset
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Including Subject to Master Netting Arrangement, Asset Offset
Entity Address, State or Province
Entity Address, State or Province
Non-accrual loans and other non-performing assets
Financing Receivable, Excluding Accrued Interest, Nonaccrual
PEO Total Compensation Amount
PEO Total Compensation Amount
Financial assets:
Assets, Fair Value Disclosure [Abstract]
SDART Platform
SDART Platform [Member]
SDART Platform
Notional Amount
Notional
Derivative, Notional Amount
Series H and I Preferred Stock
Series H and I Preferred Stock [Member]
Series H and I Preferred Stock
Customer repurchase accounts (as a percent)
Percentage Of Interest-Bearing Deposit Liabilities To Deposits, Customer Repurchase Accounts
Percentage Of Interest-Bearing Deposit Liabilities To Deposits, Customer Repurchase Accounts
Balance
Secured Debt
Federal funds purchased and securities loaned or sold under repurchase agreements
Federal Funds Purchased, Security Sold under Agreement to Repurchase, and Deposit Received for Security Loaned
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Gross amounts of recognized liabilities
Security Loaned, Subject to Master Netting Arrangement, before Offset
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Percentage of level 3 assets to total assets
Percentage of Level 3 Assets To Total Assets
Percentage of Level 3 Assets To Total Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Credit Quality Indicator [Line Items]
Mortgage servicing
Mortgage Servicing Rights [Member]
Mortgage Servicing Rights [Member]
Investment securities:
Investments [Abstract]
Due after 5 years but within 10 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Interest income recognized on nonaccrual loans
Financing Receivable, Nonaccrual, Interest Income
TOTAL NON-INTEREST INCOME
Noninterest Income
Schedule of FHLB AND FRB Stock Purchases And Redemptions
Supplemental cash flow information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
FHLB stock purchased at par
Payments to Acquire Federal Home Loan Bank Stock
Amortized Cost
Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Total non-performing assets
Financing Receivable, Nonaccrual And Other Real Estate, Foreclosed Assets, And Repossessed Assets
Financing Receivable, Nonaccrual And Other Real Estate, Foreclosed Assets, And Repossessed Assets
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Depository Shares, Series H Prefered Stock
Depository Shares, Series H Prefered Stock [Member]
Depository Shares, Series H Prefered Stock
CDs
Time Deposits
Consideration:
Business Combination, Consideration Transferred [Abstract]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Cash dividends paid to preferred stockholders
Payments of Ordinary Dividends, Preferred Stock and Preference Stock
Class of Stock [Axis]
Class of Stock [Axis]
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
On-balance sheet securitization transaction, retained
On-Balance Sheet Securitization Transaction, Retained
On-Balance Sheet Securitization Transaction, Retained
Interchange income, net
Interchange Income [Member]
Interchange Income [Member]
Warehouse lines with third parties, maturing through April 2028
Warehouse Lines Maturing Through April 2028 [Member]
Warehouse Lines Maturing Through April 2028
Debt Securities, Held-to-maturity [Table]
Debt Securities, Held-to-Maturity [Table]
Accumulated Amortization
Intangible Asset, Finite-Lived, Accumulated Amortization
Amount
Intangible Asset, Indefinite-Lived, Acquired
Committed Amount
Line of Credit Facility, Maximum Borrowing Capacity
30-89 Days Past Due
30-89 DPD
Financial Asset, 30 To 89 Days Past Due [Member]
Financial Asset, 30 to 89 Days Past Due [Member]
Banking and Thrift, Other Disclosure [Abstract]
Banking and Thrift, Other Disclosure [Abstract]
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Including Subject to Master Netting Arrangement, After Offset
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Including Subject to Master Netting Arrangement, After Offset
Dividend accrual, percentage
Temporary Equity, Dividend Accrual, Percentage
Temporary Equity, Dividend Accrual, Percentage
Net LHFI
Net LHFI
LHFI, net
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted
New Accounting Pronouncements, Policy [Policy Text Block]
Litigation Case [Axis]
Litigation Case [Axis]
Repossessed vehicles
Repossessed Vehicles
Repossessed Vehicles
Schedule of Deposits and Other Customer Accounts
Summary Of Deposits [Table Text Block]
Summary of Deposits [Table Text Block]
Less: accumulated depreciation
Property, Plant, and Equipment, Lessor Asset under Operating Lease, Accumulated Depreciation
31-90 days
Maturity 30 to 90 Days [Member]
Year Three
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets
Security Loaned, Subject to Master Netting Arrangement, after Offset
Net change in:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Less than 12 months
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
NET CASH (USED IN) / PROVIDED BY INVESTING ACTIVITIES
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Auto loans impaired due to bankruptcy
Auto Loans Impaired Due to Bankruptcy [Member]
Auto Loans Impaired Due to Bankruptcy [Member]
Trading securities, FV-NI, cost
Debt Securities, Trading, and Equity Securities, FV-NI, Cost
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral received
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, after Offset
Due after 5 years but within 10 years
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Series J Preferred Stock
Series J Preferred Stock [Member]
Series J Preferred Stock
Temporary equity, shares outstanding (in shares)
Temporary Equity, Shares Outstanding
Security Exchange Name
Security Exchange Name
CD in denominations greater than $250,000
Time Deposits, $250,000 or More
Time Deposits, $250,000 or More
HTM (fair value of $20,732 and $11,871 as of September 30, 2026 and December 31, 2025, respectively)
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss
Total
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date
Credit Loss Status [Domain]
Credit Loss Status [Domain]
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Axis]
Amortized cost basis, excluding allowance
Financing Receivable, before Allowance for Credit Loss
GNMA - Residential
Residential Mortgage Backed Securities Issued By Other Government Agencies [Member]
Residential mortgage backed securities issued by Government agencies other than FNMA or FHLMC. [Member]
Total financial liabilities
Liabilities, Fair Value Disclosure
Schedule of Consumer Lending Asset Quality Indicators-FICO and LTV Ratio
Schedule Of Financing Receivable By Credit Score And By Loan To Value Ratio [Table Text Block]
Schedule of Financing Receivable by Credit Score and by Loan To Value Ratio [Table Text Block]
Foreclosed assets
Foreclosed Assets [Member]
Foreclosed Assets [Member]
Net impact of activities on Preferred stock
Stockholders' Equity, Period Increase (Decrease)
12 months or longer
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Interest and fees on federal funds sold and securities purchased under resale agreements or similar arrangements
Interest Income, Federal Funds Sold and Securities Purchased under Agreements to Resell
Name
Outstanding Recovery, Individual Name
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Number of reportable segments not disclosed flag
NumberOfReportableSegmentsNotDisclosedFlag
NumberOfReportableSegmentsNotDisclosedFlag
GENERAL, ADMINISTRATIVE AND OTHER EXPENSES:
General and Administrative Expense [Abstract]
Net proceeds on retained bonds from new securitizations
Cash Flows Between Transferor And Transferee, Proceeds On Retained Bonds
Cash Flows Between Transferor And Transferee, Proceeds On Retained Bonds
Net Carrying Amount
Intangible Asset, Excluding Goodwill, Indefinite-Lived
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
AFS debt and other securities:
Debt Securities, Gain (Loss), Alternative [Abstract]
Reclassification adjustment, net activity
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Sensitivity analysis of fair value, impact of 20 percent adverse change in prepayment speed, increase (decrease)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed
Net change in federal funds sold and securities purchased under resale agreements
Proceeds from (Payments for) Federal Funds Sold and Securities Purchased under Agreements to Resell, Net
Due within one year
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Deposits and other customer accounts
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits And Other Customer Accounts
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits And Other Customer Accounts
Liability derivatives Fair value
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value
Purchases of and contributions to equity method and other investments
Payments to Acquire Other Investments
Other
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance
Long-Term Debt, Gross
Residential mortgages
Residential mortgages
Residential Mortgage [Member]
Debt securities AFS (Note 2)
Debt Securities [Member]
Asset Class [Domain]
Asset Class [Domain]
Total
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Equity ownership, excluding consolidated entity and equity method investee, percentage
Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Credit Score, FICO [Axis]
Credit Score, FICO [Axis]
Total
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Excluding Loans Held For Sale
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Excluding Loans Held For Sale
Compensation Amount
Outstanding Recovery Compensation Amount
Individual:
Individual [Axis]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Loans Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Entity Emerging Growth Company
Entity Emerging Growth Company
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
LHFI
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
DERIVATIVES
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Gross Unrealized Loss
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss
CRE
CRE [Member]
CRE
Prepaid expense
Prepaid Expense
Short-term borrowings
Short-Term Debt
VIE, maximum exposure to loss
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount
Gross amounts of recognized liabilities, total derivatives subject to a master netting arrangement or similar arrangement
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, net amount
Derivative Asset, Not Subject to Master Netting Arrangement, after Offset and Deduction
Derivative Asset, Not Subject to Master Netting Arrangement, after Offset and Deduction
Credit loss expense/ (benefit) on unfunded lending commitments
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [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.
Accrued interest on investment securities
Accrued Investment Income Receivable
Financing receivable, excluding accrued interest, allowance for credit loss, period increase (decrease)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease)
Intangible Asset, Goodwill and Other [Abstract]
Intangible Asset, Goodwill and Other [Abstract]
Letters of credit
Letters of Credit Outstanding, Amount
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale [Line Items]
No FICO score available
FICO Score Not Refreshed [Member]
FICO score not refreshed [Member]
Borrowings and other debt obligations
Total borrowings and other debt obligations
Total Parent Company and subsidiaries' borrowings and other debt obligations
Debt and Lease Obligation
MEZZANINE AND STOCKHOLDER'S EQUITY
Equity and Temporary Equity [Text Block]
Equity and Temporary Equity
Miscellaneous assets and receivables
Other Assets, Miscellaneous
Enterprise Financial Group
Enterprise Financial Group v. SC EFG [Member]
Enterprise Financial Group v. SC EFG
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Intangible Asset, Indefinite-Lived, Class [Domain]
Intangible Asset, Indefinite-Lived, Class [Domain]
Total ACL, end of period
Total ACL, end of period
Financing Receivable, Allowance For Credit Losses, Excluding Accrued Interest And Off-Balance Sheet, Credit Loss, Liability
A valuation allowance for financing receivables that are expected to be uncollectible and reserve for unfunded lending commitments.
Schedule of Difference Between Fair Value and Principal Balance of LHFS
Fair Value Option, Disclosures [Table Text Block]
Principal balance of loans serviced for others
Loans Serviced For Others, Principal Balance
Principal balance of loans serviced for others
Schedule of Other Commitments
Other Commitments [Table Text Block]
Year Three
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff
General, administrative and other expenses
General, Administrative And Other Expenses, Adjusted
General, Administrative And Other Expenses, Adjusted
Financing receivable, accrued interest after allowance for credit loss statement of financial position extensible list not disclosed flag
Financing Receivable, Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List Not Disclosed Flag
Financing Receivable, Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List Not Disclosed Flag
All Executive Categories
All Executive Categories [Member]
Valuation Approach and Technique [Domain]
Valuation Approach and Technique [Domain]
UPB (1)
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
SBNA
Santander Bank, National Association [Member]
Santander Bank, National Association [Member]
Amortized Cost > 90 Days and Accruing
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing
Loans transferred from/(to) LHFI (from)/to LHFS, net
Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale
Settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements
Gross amounts not offset in the condensed consolidated balance sheets, financial instruments, derivative liability not subject to master netting
Derivative Liability, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Liability, Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Technology, outside service, and marketing expense
Information Technology and Data Processing
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Non-interest-bearing demand deposits (as a percent)
Percentage Of Noninterest-bearing Deposit Liabilities To Deposits, Demand
Percentage Of Noninterest-bearing Deposit Liabilities To Deposits, Demand
BUSINESS SEGMENT INFORMATION
Segment Reporting [Text Block]
Proceeds from prepayments and maturities of AFS investment securities
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Reserve on purchased loans at acquisition
Day 1 allowance on purchased loans at acquisition
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan and Purchased with Credit Deterioration
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan and Purchased with Credit Deterioration
Minimum
Minimum [Member]
Investment Type [Axis]
Investment Type [Axis]
Less than 12 months
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value
Variable Interest Entity and Securitizations [Abstract]
Variable Interest Entity and Securitizations [Abstract]
Variable Interest Entity and Securitizations [Abstract]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Federal funds purchased and securities loaned or sold under repurchase agreements
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure
Gross amounts of recognized liabilities, total derivative liabilities
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement
Schedule of Disaggregation of Revenue from Contracts with Customers
Disaggregation of Revenue [Table Text Block]
VIEs
Variable Interest Entity Disclosure [Text Block]
LIABILITIES
Liabilities
Liabilities [Abstract]
Securities borrowed
Offsetting Securities Borrowed [Abstract]
Income Statement Location [Axis]
Location, Statement of Income, Balance [Axis]
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Demand deposit overdrafts that have been reclassified as loan balances
Deposit Liabilities Reclassified as Loans Receivable
Securities lending
Offsetting Securities Loaned [Abstract]
Accrued interest receivable
Financing Receivable, Accrued Interest, after Allowance for Credit Loss
Accounts payable, accrued expenses and other liabilities
Various other liabilities
Other Liabilities
CRE loans
CRE
Commercial Real Estate Loans [Member]
Commercial Real Estate Loans [Member]
Business Combination [Line Items]
Business Combination [Line Items]
Out-of-scope of revenue from contracts with customers
Noninterest Income, Other Operating Income
RICs HFI
Fair Value, Option, Loans Held as Assets, Aggregate Amount
Fair Value, Option, Loans Held as Assets, Aggregate Amount
FHLB stock redeemed at par
Proceeds from Sale of Federal Home Loan Bank Stock
Financing Receivable, Allowance for Credit Loss [Table]
Financing Receivable, Allowance for Credit Loss [Table]
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Selected Useful Life
Intangible Asset, Finite-Lived, Useful Life
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Held-to-Maturity Securities [Line Items]
Due after 10 years
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
Exercise Price
Award Exercise Price
Amortized Cost
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss
Recurring
Fair Value, Recurring [Member]
Segment Reporting [Line Items]
Segment Reporting [Line Items]
Document Quarterly Report
Document Quarterly Report
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Special mention
Special Mention [Member]
Common Stock and Paid-in Capital
Common Stock Including Additional Paid in Capital [Member]
Year Four
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff
Proceeds from sales of AFS investment securities
Proceeds from Sale of Debt Securities, Available-for-Sale
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
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Equity method investments
Equity Method Investments
Equity Component [Domain]
Equity Component [Domain]
Measurement Input Type [Domain]
Measurement Input Type [Domain]
Gains/(losses) in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Gains/(losses) in earnings
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Foreign exchange contracts
Foreign exchange
Foreign Exchange Contract [Member]
RICs HFI
RICs HFI
Loans Receivable, Fair Value Disclosure
Trusts
Trusts [Member]
Trusts [Member]
Adoption Date
Trading Arrangement Adoption Date
Capital markets receivables
Capital Markets Receivables
Capital Markets Receivables
Counterparty Name [Domain]
Counterparty Name [Domain]
MSRs
Servicing Asset
Depository services
Depository Services [Member]
Depository Services [Member]
Accounts payable, accrued expenses, and other liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable, Accrued Expenses, and Other Liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable, Accrued Expenses, and Other Liabilities
Equity securities
Equity Securities, FV-NI, Current
680-719
FICO Score of 680 to 719 [Member]
FICO Score of 680 to 719
Gain (loss) on redemption of FHLB stock
Gain (Loss) On Sale Of Federal Home Loan Bank Stock
Gain (Loss) On Sale Of Federal Home Loan Bank Stock
Title
Trading Arrangement, Individual Title
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
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]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Value of securitization retained
Financing Receivable, Held-For-Sale, Excluding Accrued Interest, Value Of Securitization Retained
Financing Receivable, Held-For-Sale, Excluding Accrued Interest, Value Of Securitization Retained
Weighted Average Life (Years)
Derivative, Average Remaining Maturity
Credit risk assumptions, historical period
Credit Risk Assumptions, Historical Period
Credit Risk Assumptions, Historical Period
Other
Corporate And Reconciling Items [Member]
Corporate And Reconciling Items
Gross amounts offset on the condensed consolidated balance sheets
Gross amounts offset
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Asset Offset
Held-to-maturity securities, fair value
Fair Value
Total
Investments in debt securities HTM
Debt Securities, Held-to-Maturity, Fair Value
Other financing activities, net
Proceeds from (Payment for) Other Financing Activity
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Commercial:
Commercial
Commercial Portfolio Segment [Member]
Asset
Interest Rate Cash Flow Hedge Asset at Fair Value
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
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.
Premises and equipment, net
Property, Plant, and Equipment, Excluding Lessor Asset under Operating Lease, after Accumulated Depreciation
Floating Rate Senior Notes due August 2029
Floating Rate Senior Notes due August 2029 [Member]
Floating Rate Senior Notes due August 2029
Core deposit intangibles - health savings accounts
Core Deposits, Health Saving Accounts [Member]
Core Deposits, Health Saving Accounts
Business Combination [Domain]
Business Combination [Domain]
Letters of credit
Letter of Credit [Member]
COMMITMENTS, CONTINGENCIES, AND GUARANTEES
Commitments and Contingencies Disclosure [Text Block]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Financial Asset, Period Past Due [Domain]
Financial Asset, Aging [Domain]
Interest and dividends on investment securities
Interest and Dividend Income, Securities, by Classification [Abstract]
RICs HFI
RICs HFI
Retail Installment Contracts Held-for-investment [Member]
Retail Installment Contracts Held-for-investment [Member]
Weighted Average
Weighted Average [Member]
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Other operating activities, net
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item
Core deposit intangibles - consumer and commercial
CDI
Core Deposits [Member]
Business Combination [Axis]
Business Combination [Axis]
Preferred stock liquidation preference value
Preferred Stock, Liquidation Preference, Value
NET CASH PROVIDED BY / (USED IN) OPERATING ACTIVITIES
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Substandard
Substandard [Member]
Interest-earning deposits
Interest Income, Deposits with Financial Institutions
Income Statement [Abstract]
Income Statement [Abstract]
Document Transition Report
Document Transition Report
Credit loss expense
Credit loss expense / (benefit)
Credit Loss Expense (Reversal)
Credit Loss Expense (Reversal)
Deferred tax assets
Deferred Income Tax Assets, Net
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Schedule of Finite-Lived Intangible Assets
Schedule of Intangible Assets Subject to Amortization
Intangible Asset, Finite-Lived [Table Text Block]
Other Commitments [Domain]
Other Commitments [Domain]
City Area Code
City Area Code
SBNA Auto Lease Trust (SBALT)
SBNA Auto Lease Trust (SBALT) Platform [Member]
SBNA Auto Lease Trust (SBALT) Platform
Borrowings and other debt obligations
Debt Instrument, Fair Value Disclosure
Name
Forgone Recovery, Individual Name
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Entity [Domain]
Entity [Domain]
Extended Maturity For Non-Natural Disasters
Extended Maturity For Non-Natural Disasters [Member]
Extended Maturity For Non-Natural Disasters
Asset, total
Derivative Instruments in Hedges, Assets, at Fair Value
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation [Line Items]
Interest income
Interest and Dividend Income, Operating
Gross amounts not offset in the condensed consolidated balance sheets, net amount, derivative liability not subject to master netting
Derivative Liability, Not Subject to Master Netting Arrangement, after Offset and Deduction
Derivative Liability, Not Subject to Master Netting Arrangement, after Offset and Deduction
Financing Receivable, Credit Quality Indicator [Table]
Financing Receivable, Credit Quality Indicator [Table]
Due after 10 years
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10
Derivate asset, statement of financial position, extensible enumeration not disclosed flag
Derivative Asset, Statement Of Financial Position, Extensible Enumeration Not Disclosed Flag
Derivative Asset, Statement Of Financial Position, Extensible Enumeration Not Disclosed Flag
Consumer Loans Secured by Real Estate
Consumer Loans Secured by Real Estate [Member]
Consumer loans secured by real estate, including residential mortgages and home equity lines of credit. [Member]
Fair value asset recurring basis, still held unrealized gain (loss), statement of income, extensible list not disclosed flag
Fair Value Asset Recurring Basis, Still Held Unrealized Gain (Loss), Statement Of Income, Extensible List Not Disclosed Flag
Fair Value Asset Recurring Basis, Still Held Unrealized Gain (Loss), Statement Of Income, Extensible List Not Disclosed Flag
Shares issued (in shares)
Stock Issued During Period, Shares, New Issues
Net change in deposits and other customer accounts
Increase (Decrease) in Deposits
Due after 5 years but within 10 years
Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10
Customer-related derivatives
Customer related derivatives [Member]
Customer related derivatives [Member]
Schedule of Cash Flows Received from Trusts
Summary Of Securitization Transactions [Table Text Block]
Summary Of Securitization Transactions [Table Text Block]
Measurement Basis [Axis]
Measurement Basis [Axis]
Gross Amounts Offset in the Condensed Consolidated Balance Sheets
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset
Proceeds from sales of LHFI
Proceeds from Sale, Loan, Held-for-Investment
Additions during the period
Goodwill, Acquired During Period
Other miscellaneous income /(loss), net
Other Miscellaneous Income (Loss), Net
Other Miscellaneous Income (Loss), Net
Due within one year
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Net unrealized gains/(losses) on investments in debt securities (2)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Cash and cash equivalents
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Schedule of Quantitative Information on Level 3 Recurring Assets and Liabilities
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Entity Current Reporting Status
Entity Current Reporting Status
NET CASH (USED IN) / PROVIDED BY FINANCING ACTIVITIES
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Total Shareholder Return Amount
Total Shareholder Return Amount
Consumer and commercial fees
Consumer and commercial fees
Fees and Commissions, Mortgage Banking and Servicing
Financial liabilities:
Liabilities, Fair Value Disclosure [Abstract]
Cash flow hedges
Cash Flow Hedging [Member]
Operating lease assets, net
Total operating lease assets, net
Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation
Total
Debt Securities, Available-For-Sale, Amortized Cost, Excluding Accrued Interest, After Allowance For Credit Loss, Excluding Unallocated FV Hedge Basis Adjustment
Debt Securities, Available-For-Sale, Amortized Cost, Excluding Accrued Interest, After Allowance For Credit Loss, Excluding Unallocated FV Hedge Basis Adjustment
Schedule of Business Acquisition, Pro Forma Information Combined Results of Operations
Business Combination, Pro Forma Information [Table Text Block]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Subsidiaries
Other Intermediate Holding Company Entities [Member]
Other Intermediate Holding Company Entities [Member]
Temporary equity, par value per share (in dollars per share)
Temporary Equity, Par or Stated Value Per Share
Term increase from modification (up to)
Financing Receivable, Modified, Weighted-Average Term Increase from Modification
12 months or longer
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Additional collateral required
Additional Collateral, Aggregate Fair Value
Net proceeds from new securitizations
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss), statement of income, extensible list not disclosed flag
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement Of Income, Extensible List Not Disclosed Flag
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement Of Income, Extensible List Not Disclosed Flag
Gains / (losses) in OCI
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)
Financial Instruments [Domain]
Financial Instruments [Domain]
Year Five
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year
Other assets - derivatives
Other assets - derivatives
Derivative Asset
Loans receivable, basis spread on variable rate
Credit Risk Assumptions, Weighted Used Vehicle Index
Credit Risk Assumptions, Weighted Used Vehicle Index
Reduction in allowance for credit loss, loans sold
Financing Receivable, Allowance for Credit Loss, Loan Sold
Intangible Asset, Finite-Lived, Class [Axis]
Intangible Asset, Finite-Lived, Class [Axis]
GOODWILL AND OTHER INTANGIBLES
Intangible Asset and Goodwill [Text Block]
Underlying Securities
Award Underlying Securities Amount
Proceeds from sales of and collections on LHFS
Proceeds from Sale and Collection, Loan, Held-for-Sale
Fair Value
Estimate of Fair Value Measurement [Member]
NON-INTEREST INCOME
Revenue from Contract with Customer [Text Block]
Preferred stock issuance (Note 10)
Stock Issued During Period, Value, New Issues
PSL
Financial Asset Acquired and Classified as a Seasoned Loan [Member]
Financial Asset Acquired and Classified as a Seasoned Loan
Joint venture, acquired amount
Joint Venture, Acquired Amount
Joint Venture, Acquired Amount
Consumer and commercial fees
Consumer And Commercial Fees [Member]
Consumer And Commercial Fees [Member]
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral received
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Preferred Stock
Preferred Stock [Member]
Other investing activities, net
Payment for (Proceeds from) Other Investing Activity
70.01% - 110%
LTV Of 70.01% To 110% [Member]
LTV of 70.01% to 110% [Member]
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table]
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table]
No LTV Available
LTV Not Applicable [Member]
LTV not applicable [Member]
Segment Reporting [Table]
Segment Reporting [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Related Party Transaction [Table]
Payment deferral and all other modifications
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount
Reserve for unfunded lending commitments, beginning of period
Reserve for unfunded lending commitments, end of period
Off-Balance-Sheet, Credit Loss, Liability
Foreclosed and other repossessed assets
Other Repossessed Assets
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
All Trading Arrangements
All Trading Arrangements [Member]
Balance
Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract]
Less than 12 months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Other Performance Measure, Amount
Other Performance Measure, Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Current Fiscal Year End Date
Current Fiscal Year End Date
Maturities of commitment amount
Other Commitment, to be Paid, Remainder of Fiscal Year
Total derivatives not subject to a master netting arrangement or similar arrangement
Derivative Liability, Not Subject to Master Netting Arrangement
Savings (as a percent)
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Savings
Percentage Of Interest-bearing Deposit Liabilities To Deposits, Savings
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Credit loss expense / (benefit)
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal)
Derivative [Line Items]
Derivative [Line Items]
Preferred stock activities (Note 11)
Temporary Equity, Stock Issued During Period, Value, New Issues
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Entity File Number
Entity File Number
Portion of Closed Portfolio
Portion of Closed Portfolio [Member]
Portion of Closed Portfolio
Net change in short-term borrowings
Proceeds from (Repayments of) Short-Term Debt
Schedule of Contractual Maturities of Investments in Debt Securities for AFS and HTM
Investments Classified by Contractual Maturity Date [Table Text Block]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Measure:
Measure [Axis]
Percent of total deposits
Deposits Liabilities, Percentage [Abstract]
Deposits Liabilities, Percentage [Abstract]
Schedule of Assets and Liabilities of Consolidated VIEs
Schedule of Variable Interest Entities [Table Text Block]
RICs HFI
Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance
Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance
TOTAL INTEREST INCOME
Interest and Dividend Income, Including Securities, Operating
Interest and Dividend Income, Including Securities, Operating
Auto
Auto Segment [Member]
Auto Segment
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Webster preferred shares, Series F and G, acquired
Stock Acquired During Period, Value
Stock Acquired During Period, Value
Equity Components [Axis]
Equity Components [Axis]
Fair value recurring basis unobservable input reconciliation asset gain (loss) statement of other comprehensive income extensible list not disclosed flag
FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag
FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag
Transfers from Level 2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3
Net amounts of assets included on the Condensed Consolidated Balance Sheets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, after Offset
Entity Interactive Data Current
Entity Interactive Data Current
Gross realized gains
Debt Securities, Realized Gain
Debt Securities, Realized Gain
Sensitivity analysis of fair value, impact of 10 percent adverse change in prepayment speed, increase (decrease)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed
Due after 1 year but within 5 years
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Proceeds from Contributions from Parent
Proceeds from Contributions from Parent
GNMA - Commercial
Commercial Mortgage Backed Securities Issued By Other Government Agencies [Member]
Commercial mortgage backed securities issued by other Government agencies [Member]
Entity Small Business
Entity Small Business
LHFS
Loans Held for Sale [Member]
Loans Held for Sale [Member]
COMPREHENSIVE (LOSS) / INCOME
Comprehensive (loss) / income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Effective Income Tax Rate Reconciliation [Table]
Effective Income Tax Rate Reconciliation [Table]
Capital markets and foreign exchange income
Capital markets and foreign exchange income
Capital Markets And Foreign Exchange Income (Loss)
Capital Markets And Foreign Exchange Income (Loss)
640-679
FICO Score of 640 to 679 [Member]
FICO Score of 640 to 679
Less than or equal to 70%
LTV Less Than Or Equal To 70% [Member]
LTV less than or equal to 70% [Member]
NET INTEREST INCOME
Interest Income (Expense), Operating
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Document Type
Document Type
Due after 10 years
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
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]
N/A
Not Assigned [Member]
Not Assigned [Member]
Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest
Litigation settlement, amount awarded from other party
Litigation Settlement, Amount Awarded from Other Party
Non-interest income
Business Combination, Pro Forma Information, Pro Forma, Noninterest Income
Business Combination, Pro Forma Information, Pro Forma, Noninterest Income
CLNs, due various dates through November 2035
Credit-Linked Notes Due Various Dates Through November 2035 [Member]
Credit-Linked Notes Due Various Dates Through November 2035
>=760
FICO Score Equal To Or Greater Than 760 [Member]
FICO Score Equal to or Greater than 760 [Member]
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, cash collateral received
Derivative Asset, Not Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Derivative Asset, Not Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Total trading securities gains / (losses)
Debt Securities, Trading, Gain (Loss)
Financial Instruments Owned and Pledged as Collateral [Table]
Financial Instruments Owned and Pledged as Collateral [Table]
Local Phone Number
Local Phone Number
Gross amounts offset on the Condensed Consolidated Balance Sheets
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, Asset Offset
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Not Subject to Master Netting Arrangement, Asset Offset
Temporary equity, shares authorized (in shares)
Temporary Equity, Shares Authorized
Amount securitized in off-balance sheet transaction
Financing Receivable, Held-For-Sale, Excluding Accrued Interest, Amount Securitized In Off-Balance Sheet Transaction
Financing Receivable, Held-For-Sale, Excluding Accrued Interest, Amount Securitized In Off-Balance Sheet Transaction
Total other comprehensive income/(loss), pre-tax activity
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent
Pledged Status [Domain]
Pledged Status [Domain]
Securities purchased under agreements to resell
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Commitments and contingencies (Note 17)
Commitments and Contingencies
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Senior Notes Due 2029
Senior Notes Due 2029 [Member]
Senior Notes Due 2029
Percentage of payment needed on past due loans for qualification
Financing Receivable, Recorded Investment, Past Due, Percentage Of Payment To Meet Contractual Requirement
Financing Receivable, Recorded Investment, Past Due, Percentage Of Payment To Meet Contractual Requirement
Executive Category:
Executive Category [Axis]
Counterparty Name [Axis]
Counterparty Name [Axis]
Other Commitments [Table]
Other Commitments [Table]
Gross amounts offset on the condensed consolidated balance sheets
Security Borrowed, Subject to Master Netting Arrangement, Liability Offset
2030
Lessor, Operating Lease, Payment to be Received, Year Four
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Loss on sales of loans
Gain (Loss) on Sales of Loans, Net
Schedule of Variable Interest Entities [Table]
Variable Interest Entity [Table]
PEO Name
PEO Name
Temporary equity, issued (in shares)
Temporary Equity, Shares Issued
Net unrealized (losses)/gains on cash flow hedge derivative financial instruments
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
12 months or longer
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value
Property, Plant and Equipment, Type [Axis]
Long-Lived Asset, Class [Axis]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
FHLB Advances
Federal Home Loan Bank Advances, Convertible Rate [Member]
Federal Home Loan Bank Advances, Convertible Rate [Member]
Entity Tax Identification Number
Entity Tax Identification Number
Collateral received
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount
Schedule of Age Analysis of Past Due Loans
Financing Receivable, Past Due [Table Text Block]
Interest and dividends on investment securities
Interest and Dividend Income, Securities, Operating
Current
Financial Asset, Not Past Due [Member]
Fair value of assets:
Business Combination, Recognized Asset Acquired, Asset [Abstract]
Notes payable
Notes Payable
Other Commitments [Line Items]
Other Commitments [Line Items]
Credit Loss Status [Axis]
Credit Loss Status [Axis]
Fair Value
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value [Abstract]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
BOLI
Bank Owned Life Insurance Income
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Gross amounts not offset in the condensed consolidated balance sheets, net amount, derivative liability subject to master netting
Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Year Three
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Excluding Loans Held for Sale
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Debt Instrument [Axis]
Debt Instrument [Axis]
INTEREST EXPENSE:
Interest Expense, Operating and Nonoperating [Abstract]
Compensation and benefits
Labor and Related Expense
Credit Score, FICO [Domain]
Credit Score, FICO [Domain]
Lease expense
Lease, Cost
Transfer of financial interest in a VIE - Borrowings
Transfer of Financial Interest in a VIE, Borrowings
Transfer of Financial Interest in a VIE, Borrowings
Net amounts of liabilities presented in the condensed consolidated balance sheets, total derivatives subject to a master netting arrangement or similar arrangement
Derivative Liability, Subject To Master Netting Agreement, After Offset
Derivative Liability, Subject To Master Netting Agreement, After Offset
C&I loans
C&I
Commercial And Industrial Loans [Member]
Commercial and Industrial Loans [Member]
Proceeds from prepayments and maturities of HTM investment securities
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities
Schedule of Other Derivative Activities
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Measurement Input Type [Axis]
Measurement Input Type [Axis]
Other
Other Comprehensive Income (Loss), Other, Net of Tax, Parent
Other Comprehensive Income (Loss), Other, Net of Tax, Parent
Insider Trading Arrangements [Line Items]
Commission and trailer fees
Commission And Trailer Fees [Member]
Commission And Trailer Fees [Member]
Less than 600
FICO Score Less Than 600 [Member]
FICO Score Less than 600 [Member]
Schedule of Operating Lease Assets, Net
Lessor, Operating Lease, Right-Of-Use Assets [Table Text Block]
Lessor, Operating Lease, Right-Of-Use Assets [Table Text Block]
Net unrealized (losses) / gains on investment in debt securities, net of tax
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Fees and other income
Fees And Other Income, Adjusted
Fees And Other Income, Adjusted
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Dealer networks
Dealer Network [Member]
Dealer Network [Member]
Total in-scope of revenue from contracts with customers
Revenue From Contracts With Customers [Member]
Revenue From Contracts With Customers [Member]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Recoveries
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery
Consumer Loans Not Secured by Real Estate
Consumer Loans Not Secured by Real Estate [Member]
Consumer Loans Not Secured by Real Estate
Wealth Management
Wealth Management Segment [Member]
Wealth Management Segment
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Cover [Abstract]
Gross amounts offset in the condensed consolidated balance sheets, total derivative assets
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement, Liability Offset
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement, Liability Offset
Foreign deposits
Deposits, Foreign
Pledged against borrowing capacity with the FRB
Collateral with Federal Reserve Bank [Member]
Collateral with Federal Reserve Bank [Member]
Net proceeds from long-term borrowings
Proceeds from Issuance of Other Long-Term Debt
Year Two
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff
Stock compensation
Stock compensation
APIC, Share-Based Payment Arrangement, Recognition and Exercise
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Security Borrowed, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Number of deferred payments per period
Financing Receivable, Excluding Accrued Interest, Number Of Deferred Payments Per Period
Financing Receivable, Excluding Accrued Interest, Number Of Deferred Payments Per Period
Federal funds sold and securities purchased under resale agreements or similar arrangements
Federal Funds Sold and Securities Purchased under Agreements to Resell
Purchases and originations of operating leases
Payments to Acquire Equipment on Lease
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, total derivative assets, financial instruments
Derivative Asset, Including Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Asset, Including Not Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Deferred tax assets, net
Deferred Tax Assets, Net
Recourse exposure on sold loans
Loans Receivable Sold with Recourse [Member]
Loans receivable sold with recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Open and overnight
Maturity Overnight and on Demand [Member]
Contribution from parent (Note 1)
Adjustments To Additional Paid In Capital, Contribution Of Subsidiary From Shareholder
Adjustments To Additional Paid In Capital, Contribution Of Subsidiary From Shareholder
Loans held for investment with variable rate of interest
Loans Receivable with Variable Rates of Interest
Schedule of Future Minimum Rental Payments Due to the Company Under Operating Leases
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]
Preferred stock offering
Proceeds from Issuance of Preferred Stock and Preference Stock
Other liabilities
Increase (Decrease) in Other Operating Liabilities
Pass
Pass [Member]
Schedule of Composition of Loans and Leases HFI by Portfolio and by Rate Type
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Gross retail installment contracts transferred to consolidated trusts
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding
Amount of Fair Value Hedge Adjustment Included in the Carrying Amount
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)
STOCKHOLDER'S EQUITY
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Vehicle inventory
Vehicle Inventory, Fair Value Disclosure
Vehicle Inventory, Fair Value Disclosure
TOTAL GENERAL, ADMINISTRATIVE AND OTHER EXPENSES
General and Administrative Expense
Unsettled purchases of investment securities
Accrual Of Investment Securities Purchased
Accrual Of Investment Securities Purchased
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized
Loans receivable, unemployment rate
Credit Risk Assumptions, Estimated Unemployment Rate
Credit Risk Assumptions, Estimated Unemployment Rate
Hedging Designation [Domain]
Hedging Designation [Domain]
Class of Stock [Domain]
Class of Stock [Domain]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Other commitments
Other Commitment
Other consumer
Other Consumer Loans [Member]
Other consumer loans, that does not meet the classification of consumer secured by real estate and automobile loans. [Member]
Investment securities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investment Securities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investment Securities
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Webster
Webster [Member]
Webster
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
INCOME TAXES
Income Tax Disclosure [Text Block]
OREO
Real Estate Acquired Through Foreclosure
Sensitivity analysis of fair value, impact of 20 percent adverse change in discount rate, increase (decrease)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate
Securities purchased under agreements to resell
Securities Purchased under Agreements to Resell
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Fair value of Santander's consideration
Business Combination, Consideration Transferred
Entity Filer Category
Entity Filer Category
Supplemental Cash Flow Elements [Abstract]
Year Two
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Excluding Loans Held for Sale
Schedule of Securities Financing Liabilities Qualified for Offset
Schedule of Financial Liabilities Eligible for Offset
Offsetting Liabilities [Table Text Block]
Cross-currency swaps
Currency Swap [Member]
Greater than 90 days
Maturity Greater than 90 Days [Member]
Financial Asset, Period Past Due [Axis]
Financial Asset, Aging [Axis]
Not designated as hedging instrument
Not Designated as Hedging Instrument [Member]
Deposits [Abstract]
Deposits [Abstract]
Investments, Debt and Equity Securities [Abstract]
Investments, Debt and Equity Securities [Abstract]
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Gross amounts offset on the condensed consolidated balance sheets
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset
Interest rate cap agreements
Interest Rate Cap [Member]
Securities lending
Securities Loaned, Gross Including Not Subject to Master Netting Arrangement
Net amounts of liabilities presented in the condensed consolidated balance sheets, total derivative liabilities
Other liabilities - derivatives
Derivative Liability
Senior Notes
Senior Notes [Member]
Entity Address, Address Line One
Entity Address, Address Line One
Series H Preferred Stock
Series H Preferred Stock [Member]
Fair Value
Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Dividends paid on preferred stock
Dividends and Interest Paid
Income tax provision
Income Tax Expense (Benefit)
Subordinated notes, due various dates through September 2035
Subordinated Notes, Due Various Dates Through December 2032 [Member]
Subordinated Notes, Due Various Dates Through December 2032
Fair value hedges
Fair Value Hedging [Member]
Gross amounts not offset on the Consolidated Balance Sheets, Net amounts
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, after Offset and Deduction
Noncredit discount (premium)
Financing Receivable, Unamortized Purchase Premium (Discount)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Prior
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Excluding Loans Held for Sale
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Excluding Loans Held for Sale
Gross charge-offs
Charge-offs
Total
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff
Federal funds sold and securities purchased under resale agreements or similar arrangements
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure
VIEs, Primary Beneficiary
Variable Interest Entity, Primary Beneficiary [Member]
Net change in federal funds purchased and securities loaned or sold under repurchase agreements
Proceeds From (Payments For) Federal Funds Purchased And Securities Loaned Or Sold Under Agreements To Resell, Net
Proceeds From (Payments For) Federal Funds Purchased And Securities Loaned Or Sold Under Agreements To Resell, Net
Loan Restructuring Modification [Domain]
Loan Restructuring Modification [Domain]
Valuation Technique, Discounted Cash Flow
Valuation Technique, Discounted Cash Flow [Member]
Statement [Table]
Statement [Table]
Year Two
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year
Schedule of Non-Accrual Loans by Class of Financing Receivable
Financing Receivable, Nonaccrual [Table Text Block]
Net (loss) / gain on operating leases
Gain (Loss) on Sale of Leased Assets, Net, Operating Leases
Gross amounts not offset on the Consolidated Balance Sheets, Cash collateral received
Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Financing receivable, purchased seasoned loan and purchased with credit deterioration, gross purchase amount
Financing Receivable, Purchased Seasoned Loan and Purchased with Credit Deterioration, Amount at Par Value
Financing Receivable, Purchased Seasoned Loan and Purchased with Credit Deterioration, Amount at Par Value
Gross amounts not offset on the Consolidated Balance Sheets, Financial instruments
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Gross Amounts of Recognized Assets
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Number of classes of notes payable backed by collateral
Number Of Classes Of Notes Payable Backed By Collateral
Number Of Classes Of Notes Payable Backed By Collateral
Additions/Issuances
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Issues
LHFS
Loan, held-for-sale, fair value
Loan, Held-for-Sale, Fair Value Disclosure
Mortgage banking income and multifamily servicing fees, net
Mortgage Banking Income And Multifamily Servicing Fees, Net
Mortgage Banking Income And Multifamily Servicing Fees, Net
Borrowings and other debt obligations
Interest Expense, Borrowings and Other Debt Obligations
Interest Expense, Borrowings and Other Debt Obligations
Loss contingency, damages sought, value
Loss Contingency, Damages Sought, Value
Balances, beginning of period
Balances, end of period
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES
Basis of Presentation and Significant Accounting Policies [Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]