2101100 - Disclosure - Basis of Presentation
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2401401 - Disclosure - Basis of Presentation (Details)
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2123100 - Disclosure - Commitments and Contingent Liabilities
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2423403 - Disclosure - Commitments and Contingent Liabilities - Capital Leases (Details)
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2423402 - Disclosure - Commitments and Contingent Liabilities - Operating Leases (Details)
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2423405 - Disclosure - Commitments and Contingent Liabilities - Other (Details)
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2423404 - Disclosure - Commitments and Contingent Liabilities - Restricted Cash (Details)
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2323301 - Disclosure - Commitments and Contingent Liabilities (Tables)
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1001000 - Statement - CONSOLIDATED BALANCE SHEETS
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1001001 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)
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1006000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS
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1005000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
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1005001 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)
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1004000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/LOSS
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1003000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS
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2109100 - Disclosure - Debt Obligations
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2409402 - Disclosure - Debt Obligations - Debt & Capital Leases (Details)
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2409404 - Disclosure - Debt Obligations - Debt Information (Details)
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2409403 - Disclosure - Debt Obligations - Interest Expense, Net (Details)
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2409405 - Disclosure - Debt Obligations - Revolving Credit Facility (Details)
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2309301 - Disclosure - Debt Obligations (Tables)
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2118100 - Disclosure - Discontinued Operations
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2418403 - Disclosure - Discontinued Operations (Details)
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2418402 - Disclosure - Discontinued Operations (Narrative) (Details)
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2318301 - Disclosure - Discontinued Operations (Tables)
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0001000 - Document - Document Entity Information
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2119100 - Disclosure - Earnings/(Loss) Per Share
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2419402 - Disclosure - Earnings/(Loss) Per Share (Details)
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2319301 - Disclosure - Earnings/(Loss) Per Share (Tables)
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2111100 - Disclosure - Fair Value Measurements
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2411402 - Disclosure - Fair Value Measurements (Details)
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2311301 - Disclosure - Fair Value Measurements (Tables)
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2107100 - Disclosure - Goodwill
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2407402 - Disclosure - Goodwill (Details)
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2307301 - Disclosure - Goodwill (Tables)
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2106100 - Disclosure - Impairment of Assets
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2406401 - Disclosure - Impairment of Assets (Details)
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2115100 - Disclosure - Income Taxes
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2415403 - Disclosure - Income Taxes - Income Tax Expense (Details)
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2415404 - Disclosure - Income Taxes - Net Deferred Tax Assets and Liabilities (Details)
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2415404 - Disclosure - Income Taxes - Net Deferred Tax Assets and Liabilities (Details)
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2415406 - Disclosure - Income Taxes - Other Information (Details)
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2415402 - Disclosure - Income Taxes - Rate Reconciliation (Details)
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2315301 - Disclosure - Income Taxes (Tables)
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2415405 - Disclosure - Income Taxes - Unrecognized Tax Benefits (Details)
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2108100 - Disclosure - Investments
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2408403 - Disclosure - Investments - Cost Method Investments (Details)
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2408402 - Disclosure - Investments - Equity Method Investments (Details)
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2308301 - Disclosure - Investments (Tables)
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2104100 - Disclosure - Marketable Securities
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2404402 - Disclosure - Marketable Securities (Details)
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2304301 - Disclosure - Marketable Securities (Tables)
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2110100 - Disclosure - Other
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2410401 - Disclosure - Other (Details)
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2114100 - Disclosure - Other Liabilities
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2414402 - Disclosure - Other Liabilities (Details)
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2314301 - Disclosure - Other Liabilities (Tables)
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2113100 - Disclosure - Other Postretirement Benefits
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2413404 - Disclosure - Other Postretirement Benefits - Changes in the Benefit Obligation and Plan Assets and Other Amounts (Details)
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2413403 - Disclosure - Other Postretirement Benefits - Changes in the Benefit Obligations Recognized in Other Comprehensive Income (Details)
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2413409 - Disclosure - Other Postretirement Benefits - Other Information (Details)
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2413405 - Disclosure - Other Postretirement Benefits - Schedule of Assumptions Used (Details)
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2413402 - Disclosure - Other Postretirement Benefits - Schedule of Components of Net Periodic Postretirement Benefit Income (Details)
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2413407 - Disclosure - Other Postretirement Benefits - Schedule of Effect of One Percentage-Point Change in Assumed Health Care Cost Trend Rates (Details)
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2413408 - Disclosure - Other Postretirement Benefits - Schedule of Expected Benefit Payments (Details)
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2413406 - Disclosure - Other Postretirement Benefits - Schedule of Health Care Cost Trend Rates (Details)
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2313301 - Disclosure - Other Postretirement Benefits (Tables)
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2112100 - Disclosure - Pension Benefits
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2412404 - Disclosure - Pension Benefits - Changes in Benefit Obligation and Plan Assets (Details)
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2412403 - Disclosure - Pension Benefits - Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details)
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2412410 - Disclosure - Pension Benefits - Contributions and Expected Benefit Payments (Details)
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2412408 - Disclosure - Pension Benefits - Fair Value of Plan Assets (Details)
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2412402 - Disclosure - Pension Benefits - Net Periodic Pension Cost (Details)
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2412409 - Disclosure - Pension Benefits - Reconciliation of Significant Observable Inputs (Details)
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2412405 - Disclosure - Pension Benefits - Schedule of Accumulated Benefit Obligations In Excess of Fair Value (Details)
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2412407 - Disclosure - Pension Benefits - Schedule of Allocation of Plan Assets (Details)
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2412406 - Disclosure - Pension Benefits - Schedule of Assumptions Used (Details)
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2412411 - Disclosure - Pension Benefits - Schedule of Multiemployer Plans (Details)
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2312301 - Disclosure - Pension Benefits (Tables)
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2103100 - Disclosure - Prior Period Adjustments
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2403403 - Disclosure - Prior Period Adjustments (Balance Sheets) (Details)
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2403405 - Disclosure - Prior Period Adjustments (Comprehensive Income) (Details)
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2403404 - Disclosure - Prior Period Adjustments (Income Statements) (Details)
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2403402 - Disclosure - Prior Period Adjustments (Narrative) (Details)
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2303301 - Disclosure - Prior Period Adjustments (Tables)
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2126100 - Disclosure - Quarterly Information (Unaudited)
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2426402 - Disclosure - Quarterly Information (Unaudited) (Details)
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2426403 - Disclosure - Quarterly Information (Unaudited) (Narrative) (Details)
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2326301 - Disclosure - Quarterly Information (Unaudited) (Tables)
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2125100 - Disclosure - Schedule II - Valuation and Qualifying Accounts
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2425401 - Disclosure - Schedule II - Valuation and Qualifying Accounts (Details)
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2122100 - Disclosure - Segment Information
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2422401 - Disclosure - Segment Information (Details)
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2120100 - Disclosure - Stock-Based Awards
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2420406 - Disclosure - Stock-Based Awards - Class A Common Stock Reserved for Issuance (Details)
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2420407 - Disclosure - Stock-Based Awards - Other Information (Details)
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2420403 - Disclosure - Stock-Based Awards - Stock Options Assumptions (Details)
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2420402 - Disclosure - Stock-Based Awards - Stock Options (Details)
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2420404 - Disclosure - Stock-Based Awards - Stock-Settled Restricted Stock Units (Details)
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2320301 - Disclosure - Stock-Based Awards (Tables)
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2121100 - Disclosure - Stockholders' Equity
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2421403 - Disclosure - Stockholders' Equity Changes in Accumulated Other Comprehensive Income (Details)
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2421402 - Disclosure - Stockholders' Equity (Details)
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2421404 - Disclosure - Stockholders' Equity Reclassifications Out of Accumulated Other Comprehensive Income (Details)
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2321301 - Disclosure - Stockholders' Equity (Tables)
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2124100 - Disclosure - Subsequent Events
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2424401 - Disclosure - Subsequent Events (Details)
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2102100 - Disclosure - Summary of Significant Accounting Policies
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2402402 - Disclosure - Summary of Significant Accounting Policies (Details)
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2202201 - Disclosure - Summary of Significant Accounting Policies (Policies)
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