Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

					Value of Initial Fixed $100 Investment based on:
Year	Summary Compensation Table Total for CEO (our principal  Executive Officer) ($)	Compensation “Actually Paid” to CEO ($)2	Average Summary Compensation Table Total for non-CEO NEOs ($)	Average Compensation “Actually Paid” to non-CEO NEOs ($)3	Webster Total Stockholder Return (TSR) ($)	Peer Group TSR ($)4	Net Income (in thousands $)	Adjusted PPNR (in thousands $)5
2024	6,050,156	5,965,633	2,743,896	2,762,718	124.60	130.90	768.7	1,415.0
2023	7,730,259	9,163,132	3,872,001	4,227,649	110.78	115.84	867.8	1,478.5
2022	8,076,856	6,999,441	5,303,542	4,464,849	99.37	116.10	644.3	1,336.7
2021	4,721,527	5,764,745	1,591,343	1,951,435	113.57	124.74	408.9	526.5
2020	3,487,859	2,659,016	1,290,681	921,679	83.13	91.29	220.6	470.0

Company Selected Measure Name

PPNR

Named Executive Officers, Footnote

The NEOs included in each year may vary and are consistent with those used in the Summary Compensation table in each year’s proxy

Peer Group Issuers, Footnote

The amounts in this column are calculated using the KBW Regional Banking index as the Peer Group TSR

PEO Total Compensation Amount

$ 6,050,156

$ 7,730,259

$ 8,076,856

$ 4,721,527

$ 3,487,859

PEO Actually Paid Compensation Amount

$ 5,965,633

9,163,132

6,999,441

5,764,745

2,659,016

Adjustment To PEO Compensation, Footnote

The amounts in this column include deductions and additions from the Summary Compensation Table Total for 2024 for the Chairman & Chief Executive Officer as follows: deduction of equity granted during the year of $3,354,304, deduction of dividends paid of $137,456, deduction of the change in pension value of -$5,500, addition of the value of equity granted during 2024 that remains unvested based on year-end fair value of $3,676,074, change in fair value of unvested equity awards from 2023 year-end to 2024 year-end of $13,234, and change in fair value of equity awards that vested during the year from 2023 year-end to vest date of -$287,571. Dividends paid on unvested and vested shares and accrued for performance shares have been included in the change in share price calculations. No additional pension service cost has been added to actual compensation because the Pension Plan is frozen. The value for time-based restricted stock is calculated using the closing price on the measurement date (date of vesting or each year-end). The value for performance-based shares is based on the actual metric at the measurement date for internal metrics and based on new Monte-Carlo calculations for TSR metrics at each measurement date

Non-PEO NEO Average Total Compensation Amount

$ 2,743,896

3,872,001

5,303,542

1,591,343

1,290,681

Non-PEO NEO Average Compensation Actually Paid Amount

$ 2,762,718

4,227,649

4,464,849

1,951,435

921,679

Adjustment to Non-PEO NEO Compensation Footnote

The amounts in this column include deductions and additions from the Summary Compensation Table Total for 2024 for the average of the other NEOs as follows: deduction of equity granted during the year of $1,006,347, deduction of dividends paid of $37,107, deduction of the change in pension value of -$1,100, addition of the value of equity granted during 2024 that remains unvested based on year-end fair value of $1,332,129, change in fair value of unvested equity awards from 2023 year-end to 2024 year-end of -$9,907 and change in fair value of equity awards that vested during the year from 2023 year-end to vest date of -$48,372. Dividends paid on unvested and vested shares and accrued for performance shares have been included in the change in share price calculations. No additional pension service cost has been added to actual compensation because the Pension Plan is frozen. The value for time-based restricted stock is calculated using the closing price on the measurement date (date of vesting or each year-end). The value for performance-based shares is based on the actual metric at the measurement date for internal metrics and based on new Monte-Carlo calculations for TSR metrics at each measurement date

Compensation Actually Paid vs. Total Shareholder Return

Compensation Actually Paid vs. Net Income

Compensation Actually Paid vs. Company Selected Measure

Total Shareholder Return Vs Peer Group

Tabular List, Table

PPNR

2ROAA

3Relative Total Stockholder Return

4Return on Equity

5Strategic Goals

6Risk Management

7Leadership

Total Shareholder Return Amount

$ 124.60

110.78

99.37

113.57

83.13

Peer Group Total Shareholder Return Amount

130.90

115.84

116.10

124.74

91.29

Net Income (Loss)

$ 768,700

$ 867,800

$ 644,300

$ 408,900

$ 220,600

Company Selected Measure Amount

1,415,000

1,478,500

1,336,700

526,500

470,000.0

Measure:: 1

Pay vs Performance Disclosure

Name

PPNR

Non-GAAP Measure Description

Adjusted PPNR is a non-GAAP measure. See Appendix A for a reconciliation of non-GAAP measures to the corresponding GAAP measures.

Measure:: 2

Pay vs Performance Disclosure

Name

ROAA

Measure:: 3

Pay vs Performance Disclosure

Name

Relative Total Stockholder Return

Measure:: 4

Pay vs Performance Disclosure

Name

Return on Equity

Measure:: 5

Pay vs Performance Disclosure

Name

Strategic Goals

Measure:: 6

Pay vs Performance Disclosure

Name

Risk Management

Measure:: 7

Pay vs Performance Disclosure

Name

Leadership

PEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 5,500

PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(3,354,304)

PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

3,676,074

PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

13,234

PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(287,571)

PEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(137,456)

Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,100

Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(1,006,347)

Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

1,332,129

Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(9,907)

Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(48,372)

Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ (37,107)