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Commitments and Contingent Liabilities - Narrative (Details) | May 01, 2020 employee
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Murray | Settlement Agreement Between Murray And UMWA [Member] |
Loss Contingencies [Line Items] |
Number of retirees | 2,159

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- Definition Number Of Retired Employees + 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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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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