2102100 - Disclosure - Accounting Policies and Interim Results
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2112100 - Disclosure - Accounting Pronouncements
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2104100 - Disclosure - Accounts Receivable, Net
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2108100 - Disclosure - Commitments and Contingencies
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2408404 - Disclosure - Commitments and Contingencies - Environmental (Details)
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2408403 - Disclosure - Commitments and Contingencies - Insurance (Details)
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2408402 - Disclosure - Commitments and Contingencies - Personal Injury (Details)
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2308301 - Disclosure - Commitments and Contingencies (Tables)
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2111100 - Disclosure - Comprehensive Income
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1004000 - Statement - Consolidated Balance Sheets
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1006000 - Statement - Consolidated Statements of Cash Flows
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1007000 - Statement - Consolidated Statements of Changes in Stockholders' Equity
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1001000 - Statement - Consolidated Statements of Income
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2107100 - Disclosure - Debt
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2407403 - Disclosure - Debt Guarantees (Details)
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2307301 - Disclosure - Debt (Tables)
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2407404 - Disclosure - Debt Variable Interest Entities - Leases (Details)
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0001000 - Document - Document and Entity Information
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2109100 - Disclosure - Employment Benefit Plans
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2309301 - Disclosure - Employment Benefit Plans (Tables)
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2103100 - Disclosure - Fuel
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2403402 - Disclosure - Fuel - Derivative Narrative (Details)
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2403404 - Disclosure - Fuel - Effects of Derivative Instruments Gains and Losses (Details)
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2303301 - Disclosure - Fuel (Tables)
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2106100 - Disclosure - Other Assets
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2406402 - Disclosure - Other Assets (Details)
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2306301 - Disclosure - Other Assets (Tables)
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2105100 - Disclosure - Other Intangible Assets and Liablities
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2110100 - Disclosure - Related Party Transactions
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2410401 - Disclosure - Related Party Transactions (Details)
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