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Commitments and Contingent Liabilities - Narrative (Details) - Settlement Agreement Between Murray And UMWA $ in Thousands	Mar. 04, 2024 USD ($)	Sep. 30, 2024 USD ($)	May 01, 2020 retiree
Loss Contingencies [Line Items]
Loss contingency payable amount	$ 75,000
Payable period	5 years
Accrued amount		$ 75,000
Murray Energy Corporation
Loss Contingencies [Line Items]
Number of impacted retirees \| retiree			2,159

- 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.

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