0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED INCOME STATEMENTS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED CASH FLOW STATEMENTS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Nature of Operations and Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Stock Plans and Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Casualty, Environmental and Other Reserves link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Employee Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Debt and Credit Agreements link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Other Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Segment Reporting and Significant Expenses link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Nature of Operations and Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Stock Plans and Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Casualty, Environmental and Other Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Debt and Credit Agreements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Other Comprehensive Income (Loss) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Segment Reporting and Significant Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Nature of Operations and Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Earnings Per Share - Schedule of Total Average Outstanding Stock Options Excluded from Diluted Earnings Per Share Calculation (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Earnings Per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Earnings Per Share - Schedule of Share Repurchase Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Stock Plans and Share-Based Compensation - Schedule of Share-Based Compensation and Related Income Tax Benefit (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Stock Plans and Share-Based Compensation - Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Stock Plans and Share-Based Compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Casualty, Environmental and Other Reserves - Schedule of Balance Sheet Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Casualty, Environmental and Other Reserves - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Employee Benefit Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Debt and Credit Agreements - Schedule of Activity Related to Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Debt and Credit Agreements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Debt and Credit Agreements - Schedule of Interest Rate Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Debt and Credit Agreements - Schedule of Interest Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Revenues - Schedule of Revenues Disaggregated by Lines of Business (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Revenues - Schedule of Accounts Receivable, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Fair Value Measurements - Schedule of Fair Value of Investment Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Fair Value Measurements - Schedule of Investment Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Fair Value Measurements - Schedule of Fair Value and Carrying Value of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Other Comprehensive Income (Loss) - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Other Comprehensive Income (Loss) - Schedule of Changes in AOCI balance by Components (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Segment Reporting and Significant Expenses- Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Segment Reporting and Significant Expenses- Schedule of Segment Reporting Information (Details) link:presentationLink link:calculationLink link:definitionLink