0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (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 - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Revenue Recognition link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Inventories link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Equity Method Investments link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Derivatives and Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Property, Plant, Equipment and Mine Development link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Long-term Debt link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Pension and Postretirement Benefit Costs link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Accumulated Other Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Other Events link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Earnings per Share (EPS) link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Financial Instruments and Other Guarantees link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Derivative Instruments and Hedging Activities (Policies) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Revenue Recognition (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Inventories (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Equity Method Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Derivatives and Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Property, Plant, Equipment and Mine Development (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Long-term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Pension and Postretirement Benefit Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Accumulated Other Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Earnings per Share (EPS) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Financial Instruments and Other Guarantees (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Revenue Recognition - Revenue by Product Type and Market (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Revenue Recognition - Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Revenue Recognition - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Inventories Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Equity Method Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Equity Method Investments Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Derivatives and Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Derivatives and Fair Value Measurements - Gains and Losses on Hedging Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Derivatives and Fair Value Measurements - Financial Instruments Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Derivatives and Fair Value Measurements - Long-term debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Intangible Contract Assets and Liabilities - Balances and Balance Sheet Classifications (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Property, Plant, Equipment and Mine Development (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Property, Plant, Equipment and Mine Development - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Leases - Supplemental Income Statement Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Leases - Supplemental Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Leases - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Leases - Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Long-term Debt - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Long-term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Pension and Postretirement Benefit Costs - Schedule of Net Periodic Benefit (Benefit) Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Pension and Postretirement Benefit Costs - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Other Events Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Earnings per Share (EPS) - Calculation of Basic and Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Earnings per Share (EPS) - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Financial Instruments and Other Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Financial Instruments and Other Guarantees - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Financial Instruments and Other Guarantees - Narratives (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Segment Information - Reconciliation of Assets to Consolidated (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Segment Information - Segment Results (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Segment Information - Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Segment Information - Reconciliation to Adjusted EBITDA (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Segment Information - Reconciliation to Property, Plant, Equipment, and Mine Development (Details) link:presentationLink link:calculationLink link:definitionLink