XML 23 R15.htm IDEA: XBRL DOCUMENT v3.26.1

Description of the Plan (Details)			11 Months Ended		12 Months Ended
	Feb. 10, 2025 USD ($)	Jan. 23, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) year loan	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Maximum number of outstanding loans allowed | loan					1
EBP 003
EBP, Description of Plan [Line Items]
Minimum age requirement for plan eligibility | year					21
Transfer in of net assets to plan	$ 4,131,766	$ 2,220,585			$ 4,131,766	$ 2,220,585
Transfer in of investments to plan	4,074,405
Transfer in of note receivable from participants to plan	$ 57,361
Maximum annual compensation to total compensation, percentage					75.00%
Requisite service period					90 days
Automatic deferral rate, annual increase					1.00%	1.00%
Vesting period					2 years
Minimum borrowing, amount			$ 1,000	$ 1,000	$ 1,000
Maximum borrowing, amount			$ 50,000	$ 50,000	$ 50,000
Maximum borrowing, to total account, percentage			50.00%	50.00%	50.00%
Basis spread on variable rate					1.00%
General loan, borrowing term					5 years
Primary residence, borrowing term					15 years
Maximum cash-out provision limit					$ 7,000	$ 5,000
Forfeited nonvested account, decrease from administrative expense					51,400	20,100
Forfeited nonvested account, decrease from employer contribution					715,169	684,367
Forfeited nonvested account			$ 88,218	$ 88,218	$ 88,218	$ 215,567
Qualified birth or adoption distributions, amount			$ 5,000
Qualified birth or adoption distributions, period for distribution			1 year
Qualified birth or adoption distributions, repayment period			3 years
EBP 003 | Vesting period one
EBP, Description of Plan [Line Items]
Vesting period				1 year
Vesting percentage				20.00%
EBP 003 | Vesting period two
EBP, Description of Plan [Line Items]
Vesting period				2 years
Vesting percentage				100.00%
EBP 003 | Matching contribution one
EBP, Description of Plan [Line Items]
Matching contribution, percentage					100.00%
Participant compensation matched, percentage					2.00%
EBP 003 | Matching contribution two
EBP, Description of Plan [Line Items]
Matching contribution, percentage					50.00%
EBP 003 | Minimum
EBP, Description of Plan [Line Items]
Automatic deferral rate					3.00%
EBP 003 | Minimum | Matching contribution two
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage					2.00%
EBP 003 | Minimum | EBP, Transition Contributions
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage					1.00%
EBP 003 | Maximum
EBP, Description of Plan [Line Items]
Automatic deferral rate					15.00%	15.00%
EBP 003 | Maximum | Matching contribution two
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage					8.00%
EBP 003 | Maximum | EBP, Transition Contributions
EBP, Description of Plan [Line Items]
Participant compensation matched, percentage					6.00%

X

- Definition

Amount of net asset available for benefit transferred to (from) employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from (to) external plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-8

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from administrative expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForAdministrativeExpense
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from employer contribution.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan, Investments

+ References

No definition available.

+ Details

Name:	wbs_EBPChangeInNetAssetAvailableForBenefitTransferToFromPlanInvestments
Namespace Prefix:	wbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan, Notes Receivable From Participants

+ References

No definition available.

+ Details

Name:	wbs_EBPChangeInNetAssetAvailableForBenefitTransferToFromPlanNotesReceivableFromParticipants
Namespace Prefix:	wbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age

+ References

No definition available.

+ Details

Name:	wbs_EBPEmployerContributionVestingPercentage
Namespace Prefix:	wbs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum Vesting service period for company contribution and/ or investment earning to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions.

+ References

No definition available.

+ Details

Name:	wbs_EBPEmployerContributionVestingServicePeriod
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Involuntary Cash-out Limit

+ References

No definition available.

+ Details

Name:	wbs_EBPInvoluntaryCashOutLimit
Namespace Prefix:	wbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

EBP, Note Receivable from Participant, Account, Maximum Number Of Outstanding Loans

+ References

No definition available.

+ Details

Name:	wbs_EBPNoteReceivableFromParticipantAccountMaximumNumberOfOutstandingLoans
Namespace Prefix:	wbs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	wbs_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	wbs_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold.

+ References

No definition available.

+ Details

Name:	wbs_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate
Namespace Prefix:	wbs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Participant Contribution, Maximum Annual Contribution to Total Compensation, Percentage

+ References

No definition available.

+ Details

Name:	wbs_EBPParticipantContributionMaximumAnnualContributionToTotalCompensationPercentage
Namespace Prefix:	wbs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Participant Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

Name:	wbs_EBPParticipantLoanBasisSpreadOnVariableRate
Namespace Prefix:	wbs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Plan Eligibility, Minimum Age Requirement

+ References

No definition available.

+ Details

Name:	wbs_EBPPlanEligibilityMinimumAgeRequirement
Namespace Prefix:	wbs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Qualified Birth Or Adoption Distributions To Participants, Distribution Period

+ References

No definition available.

+ Details

Name:	wbs_EBPQualifiedBirthOrAdoptionDistributionsToParticipantsDistributionPeriod
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Qualified Birth Or Adoption Distributions To Participants, Distribution Repayment Period

+ References

No definition available.

+ Details

Name:	wbs_EBPQualifiedBirthOrAdoptionDistributionsToParticipantsDistributionRepaymentPeriod
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

EBP, Qualified Birth Or Adoption Distributions To Participants, Threshold Amount

+ References

No definition available.

+ Details

Name:	wbs_EBPQualifiedBirthOrAdoptionDistributionsToParticipantsThresholdAmount
Namespace Prefix:	wbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

EBP, Requisite Service Period

+ References

No definition available.

+ Details

Name:	wbs_EBPRequisiteServicePeriod
Namespace Prefix:	wbs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=wbs_EBP003Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wbs_EBPVestingPeriodAxis=wbs_EBPVestingPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wbs_EBPVestingPeriodAxis=wbs_EBPVestingPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wbs_EBPEmployerContributionTypeAxis=wbs_EBPMatchingContributionOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wbs_EBPEmployerContributionTypeAxis=wbs_EBPMatchingContributionTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wbs_EBPEmployerContributionTypeAxis=wbs_EBPTransitionContributionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: