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Retirement Plans (Narrative) (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 Participant | Apr. 30, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |
Newly eligible associates initial savings rate | 3.00% |
Eligible participants under VERIP | Participant | 260 |
Pension plan assets |  | $ 808
Benefit obligation |  | $ 597
First 1% Of Contribution Saved [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Matching percentage | 100.00% |
Percentage of compensation saved | 1.00% |
Next 5% Of Contribution Saved [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Matching percentage | 50.00% |
Percentage of compensation saved | 5.00% |
Amended Hancock 401K Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Additional matching percentage | 2.00% |
Period of employment for eligibility | 3 years |
Amended Hancock 401K Plan [Member] | 4% Of Contribution [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Matching percentage | 4.00% |
Amended Hancock 401K Plan [Member] | 6% Of Contribution [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Matching percentage | 6.00% |
Amended Hancock 401K Plan [Member] | 2% Of Contribution [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Matching percentage | 2.00% |

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