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Retirement Plans (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributed to pension plan | $ 100 |  |
Newly eligible associates initial savings rate |  |  | 3.00%
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%
2017 Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Contributed to pension plan |  | $ 39 |
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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- Definition Defined Contribution Plan, Employer Matching Contribution, Additional Percent of Match + References No definition available. + Details
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- Definition Defined Contribution Plan, Initial Savings Rate + References No definition available. + Details
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- Definition Defined contribution plan, period of employment for eligibility. + References No definition available. + Details
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- 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 No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
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- Details
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- Details
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- Details
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- Details
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