2402402 - Disclosure - Business Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 2102100 - Disclosure - Business Acquisitions (Notes) link:presentationLink link:calculationLink link:definitionLink 2302301 - Disclosure - Business Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 2118100 - Disclosure - Commitments And Contingencies link:presentationLink link:calculationLink link:definitionLink 2318302 - Disclosure - Commitments And Contingencies Capital Committments (Tables) link:presentationLink link:calculationLink link:definitionLink 2418404 - Disclosure - Commitments And Contingencies (Future Minimum Payments Under Operating Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 2418403 - Disclosure - Commitments And Contingencies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2318301 - Disclosure - Commitments And Contingencies Schedule of Operating Lease Payments (Tables) link:presentationLink link:calculationLink link:definitionLink 2112100 - Disclosure - Common Stock Common Stock (Notes) link:presentationLink link:calculationLink link:definitionLink 2412401 - Disclosure - Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1005000 - Statement - Consolidated Statements Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 1005000 - Statement - Consolidated Statements Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 1004000 - Statement - Consolidated Statements Of Changes In Equity link:presentationLink link:calculationLink link:definitionLink 1006000 - Statement - Consolidated Statements of Comprehensive Income Statement link:presentationLink link:calculationLink link:definitionLink 1002000 - Statement - Consolidated Statements Of Income link:presentationLink link:calculationLink link:definitionLink 2105100 - Disclosure - Construction Reserve Funds Construction Reserve Funds (Notes) link:presentationLink link:calculationLink link:definitionLink 2405401 - Disclosure - Construction Reserve Funds (Details) link:presentationLink link:calculationLink link:definitionLink 2109100 - Disclosure - Derivative Instruments And Hedging Strategies link:presentationLink link:calculationLink link:definitionLink 2409403 - Disclosure - Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 2409402 - Disclosure - Derivative Instruments And Hedging Strategies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - Derivative Instruments And Hedging Strategies (Recognized Gains (Losses) On Derivative Instruments Not Designated As Hedging Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 2309301 - Disclosure - Derivative Instruments And Hedging Strategies (Tables) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 2403401 - Disclosure - Equipment Acquisitions And Dispositions (Major Equipment Deliveries) (Details) link:presentationLink link:calculationLink link:definitionLink 2403403 - Disclosure - Equipment Acquisitions And Dispositions (Major Equipment Dispositions) (Details) link:presentationLink link:calculationLink link:definitionLink 2403402 - Disclosure - Equipment Acquisitions And Dispositions (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2303300 - Disclosure - Equipment Acquisitions And Dispositions (Tables) link:presentationLink link:calculationLink link:definitionLink 2111100 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 2411403 - Disclosure - Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2411402 - Disclosure - Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 2411404 - Disclosure - Fair Value Measurements (Non-Financial Assets And Liabilities Measured At Fair Value) (Details) link:presentationLink link:calculationLink link:definitionLink 2311301 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - Income Taxes (Components Of Income Tax Expense (Benefit)) (Details) link:presentationLink link:calculationLink link:definitionLink 2408406 - Disclosure - Income Taxes (Components Of The Net Deferred Income Tax Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2408405 - Disclosure - Income Taxes (Schedule Of Effective Income Tax Rate) (Details) link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - Income Taxes (Schedule Of Income Before Income Tax Expense (Benefit) And Equity In Earnings Of 50% Or Less Owned Companies) (Details) link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 2104100 - Disclosure - Investments, At Equity, And Advances To 50% Or Less Owned Companies link:presentationLink link:calculationLink link:definitionLink 2404402 - Disclosure - Investments, At Equity, And Advances To 50% Or Less Owned Companies (Investments, At Equity, And Advances To 50% Or Less Owned Companies) (Details) link:presentationLink link:calculationLink link:definitionLink 2404404 - Disclosure - Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2404403 - Disclosure - Investments, At Equity, And Advances To 50% Or Less Owned Companies (Summarized Financial Information For The Company's Investments, At Equity) (Details) link:presentationLink link:calculationLink link:definitionLink 2304301 - Disclosure - Investments, At Equity, And Advances To 50% Or Less Owned Companies (Tables) link:presentationLink link:calculationLink link:definitionLink 2107100 - Disclosure - Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - Long-Term Debt (Narrative) (Senior Notes And Convertible Debentures) (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Long-Term Debt (Schedule Of Company's Borrowings) (Details) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - Long-Term Debt (Schedule Of Long-Term Debt Maturities) (Details) link:presentationLink link:calculationLink link:definitionLink 2307301 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 2119100 - Disclosure - Major Customers And Segment Information link:presentationLink link:calculationLink link:definitionLink 2419403 - Disclosure - Major Customers And Segment Information Major Customers And Segment Information (Narrrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2419402 - Disclosure - Major Customers And Segment Information (Operating Results, Capital Expenditures And Assets By Reportable Segments) (Details) link:presentationLink link:calculationLink link:definitionLink 2319301 - Disclosure - Major Customers And Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2101100 - Disclosure - Nature Of Operations And Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2401404 - Disclosure - Nature Of Operations And Accounting Policies (Deferred Revenues Included In Other Current Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2401405 - Disclosure - Nature Of Operations And Accounting Policies (Estimated Useful life Of Major Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 2401403 - Disclosure - Nature Of Operations And Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2401408 - Disclosure - Nature Of Operations And Accounting Policies Nature Of Operations And Accounting Policies (Schedule of Accumulated Other Comprehensive Income (Loss))(Details) link:presentationLink link:calculationLink link:definitionLink 2201201 - Disclosure - Nature Of Operations And Accounting Policies (Policy) link:presentationLink link:calculationLink link:definitionLink 2401407 - Disclosure - Nature Of Operations And Accounting Policies (Schedule Of Deferred Gain Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 2401406 - Disclosure - Nature Of Operations And Accounting Policies (Schedule Of Property And Equipment By Major Classes) (Details) link:presentationLink link:calculationLink link:definitionLink 2301302 - Disclosure - Nature Of Operations And Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2413402 - Disclosure - Noncontrolling Interests in Subsidiaries (Details) link:presentationLink link:calculationLink link:definitionLink 2313301 - Disclosure - Noncontrolling Interests in Subsidiaries Noncontrolling Interests (Tables) link:presentationLink link:calculationLink link:definitionLink 2113100 - Disclosure - Noncontrolling Interests in Subsidiaries (Notes) link:presentationLink link:calculationLink link:definitionLink 2122100 - Disclosure - Quarterly Financial Information link:presentationLink link:calculationLink link:definitionLink 2422402 - Disclosure - Quarterly Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 2322301 - Disclosure - Quarterly Financial Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2117100 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 2417401 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2114100 - Disclosure - Savings Plans And Multiemployer Pension Plans link:presentationLink link:calculationLink link:definitionLink 2414401 - Disclosure - Savings Plans And Multiemployer Pension Plans (Details) link:presentationLink link:calculationLink link:definitionLink 2115100 - Disclosure - Share Based Compensation link:presentationLink link:calculationLink link:definitionLink 2415402 - Disclosure - Share Based Compensation (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2415403 - Disclosure - Share Based Compensation (Share Based Compensation Plans) (Details) link:presentationLink link:calculationLink link:definitionLink 2315301 - Disclosure - Share Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 2121100 - Disclosure - Supplemental Information For Statements Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 2421402 - Disclosure - Supplemental Information For Statements Of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 2321301 - Disclosure - Supplemental Information For Statements Of Cash Flows (Tables) link:presentationLink link:calculationLink link:definitionLink 2106100 - Disclosure - Third Party Notes Receivable link:presentationLink link:calculationLink link:definitionLink 2406401 - Disclosure - Third Party Notes Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 2123100 - Disclosure - Valuation And Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 2423401 - Disclosure - Valuation And Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink