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000200 - Statement - Consolidated Balance Sheets
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000300 - Statement - Consolidated Statements Of Cash Flows
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000150 - Statement - Consolidated Statements Of Comprehensive Income
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040201 - Disclosure - Earnings Per Share (Details)
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040502 - Disclosure - Pension And Postretirement Benefits (Pension And Postretirement Benefit Costs Included In Operating Expenses) (Details)
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000090 - Document - Document And Entity Information
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000205 - Statement - Consolidated Balance Sheets (Parenthetical)
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000400 - Statement - Consolidated Statement Of Changes In Stockholders' Equity
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000450 - Statement - Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical)
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010101 - Disclosure - Preparation Of Interim Financial Statements
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010201 - Disclosure - Earnings Per Share
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010401 - Disclosure - Segment Information
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010501 - Disclosure - Pension And Postretirement Benefits
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010601 - Disclosure - Fair Value Measurements And Disclosure
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010701 - Disclosure - Acquisitions, Dispositions And Other Adjustments
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010901 - Disclosure - Subsequent Events
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020401 - Disclosure - Segment Information (Policy)
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020501 - Disclosure - Pension And Postretirement Benefits (Policy)
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030203 - Disclosure - Earnings Per Share (Tables)
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030603 - Disclosure - Fair Value Measurements And Disclosure (Tables)
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030703 - Disclosure - Acquisitions, Dispositions And Other Adjustments (Tables)
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040101 - Disclosure - Preparation Of Interim Financial Statements (Details)
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040401 - Disclosure - Segment Information (Summary Of Operating Revenues And Expenses By Segment)(Details)
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040501 - Disclosure - Pension And Postretirement Benefits (Narrative) (Details)
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040601 - Disclosure - Fair Value Measurements And Disclosure (Narrative) (Details)
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040602 - Disclosure - Fair Value Measurements And Disclosure (Long-Term Debt And Other Financial Instruments) (Details)
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040603 - Disclosure - Fair Value Measurements And Disclosure (Fair Value Leveling) (Details)
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040604 - Disclosure - Fair Value Measurements And Disclosure (Notional Amount Of Our Outstanding Derivative Positions) (Details)
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040605 - Disclosure - Fair Value Measurements And Disclosure (Effect Of Derivatives On The Consolidated Statements Of Income) (Details)
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040701 - Disclosure - Acquisitions, Dispositions And Other Adjustments (Narrative) (Details)
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040901 - Disclosure - Subsequent Events (Narrative) (Details)
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020601 - Disclosure - Fair Value Measurements And Disclosure (Policy)
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000160 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical)
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040402 - Disclosure - Segment Information (Summary Of Operating Revenues And Expenses By Segment) (Narrative) (Details)
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020101 - Disclosure - Preparation Of Interim Financial Statements (Policy)
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040301 - Disclosure - Accumulated Other Comprehensive Income (Details)
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030301 - Disclosure - Accumulated Other Comprehensive Income (Tables)
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010301 - Disclosure - Accumulated Other Comprehensive Income
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040702 - Disclosure - Acquisitions, Dispositions And Other Adjustments (Operating Results Of Discontinued Operation) (Details)
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010801 - Disclosure - Sale of Equipment Installment Receivables
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040801 - Disclosure - Sale Of Equipment Installment Receivables (Narrative) (Details)
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030801 - Disclosure - Sale of Equipment Installment Receivables (Tables)
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040802 - Disclosure - Sale Of Equipment Installment Receivables (Finance Receivables)
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