0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Statements of Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Merger with Arch link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Revenue From Contracts With Customers link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Components of Pension and Other Postretirement Benefit Plans Net Periodic Benefit Costs link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Cash, Cash Equivalents, Restricted Cash and Short-term Investments link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Credit Losses link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Inventories link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Accounts Receivable Securitization link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Property, Plant and Equipment link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Other Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Derivatives link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Stock Repurchases link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Basis of Presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Merger with Arch (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Revenue From Contracts With Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Components of Pension and Other Postretirement Benefit Plans Net Periodic Benefit Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Cash, Cash Equivalents, Restricted Cash and Short-term Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Credit Losses (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Inventories (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Property, Plant and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Other Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Commitments and Contingent Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Basis of Presentation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Basis of Presentation - Schedule of Antidilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Basis of Presentation - Schedule of Basic and Dilutive Earnings (Loss) per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Merger with Arch - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Merger with Arch - Schedule of Allocation of Aggregate Purchase Price (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Merger with Arch - Schedule of Pro Forma Adjustments (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Revenue From Contracts With Customers - Schedule of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Revenue From Contracts With Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Revenue From Contracts With Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Components of Pension and Other Postretirement Benefit Plans Net Periodic Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Cash, Cash Equivalents, Restricted Cash and Short-term Investments - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Cash, Cash Equivalents, Restricted Cash and Short-Term Investments - Schedule of Available-for-Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Accounts Receivable Securitization (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Property, Plant and Equipment - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Other Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Long-Term Debt - Schedule of Long-term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Long-Term Debt - Schedule of Long-term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Long-Term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Commitments and Contingent Liabilities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Commitments and Contingent Liabilities - Schedule of Guarantor Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Fair Value of Financial Instruments - 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