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Employee Benefit Plans (Narrative) (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2023 | Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to qualified defined benefit pension plans and OPEB plans | $ 0 |
Other Postretirement Benefits Plan | Forecast |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contribution to voluntary employees beneficiary association |  | $ 0

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- Definition Contribution To Voluntary Employees Beneficiary Association Trust + 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 Amount of cash outflow for pension and other postretirement benefits. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. + 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585 + Details
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- Details
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- Details
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