v3.25.1
Document and Entity Information Statement
Apr. 24, 2025
Entity Information [Line Items]  
Amendment Flag false
Document Type 8-K
Document Period End Date Apr. 24, 2025
Entity Registrant Name WEBSTER FINANCIAL CORPORATION
Entity Incorporation, State or Country Code DE
Entity File Number 001-31486
Entity Tax Identification Number 06-1187536
Entity Address, Address Line One 200 Elm Street
Entity Address, City or Town Stamford
Entity Address, State or Province CT
Entity Address, Postal Zip Code 06902
City Area Code 203
Local Phone Number 578-2202
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0000801337
NEW YORK STOCK EXCHANGE, INC. [Member]  
Entity Information [Line Items]  
Security Exchange Name NYSE
Common Class A [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol WBS
Series F Preferred Stock [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, each representing 1/1000th interest in a share of 5.25% Series F Non-Cumulative Perpetual Preferred Stock
Trading Symbol WBS-PrF
Series G Preferred Stock  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, each representing 1/40th interest in a share of 6.50% Series G Non-Cumulative Perpetual Preferred Stock
Trading Symbol WBS-PrG