Pension and Other Postretirement Benefits (Summary of Weighted-Average Assumptions to Determine Benefit Obligations) (Details)	Dec. 31, 2013	Dec. 31, 2012
Webster Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.80%	3.90%
Webster SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%	3.40%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.75%	2.85%