00100 - Statement - Consolidated Balance Sheetslink:presentationLinklink:calculationLinklink:definitionLink00200 - Statement - Consolidated Statements Of Operations And Comprehensive Incomelink:presentationLinklink:calculationLinklink:definitionLink00400 - Statement - Consolidated Statements Of Capitalizationlink:presentationLinklink:calculationLinklink:definitionLink00410 - Statement - Consolidated Statements of Capitalization (Alternative Calculation)link:presentationLinklink:calculationLinklink:definitionLink00600 - Statement - Consolidated Statements Of Cash Flowlink:presentationLinklink:calculationLinklink:definitionLink40702 - Disclosure - Financial Instruments (Summary Of Unrealized Gain And Losses) (Details)link:presentationLinklink:calculationLinklink:definitionLink40802 - Disclosure - Net Income Per Common Share (Schedule Of Earnings Per Share) (Details)link:presentationLinklink:calculationLinklink:definitionLink41002 - Disclosure - Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Costs) (Details)link:presentationLinklink:calculationLinklink:definitionLink00090 - Document - Document And Entity Informationlink:presentationLinklink:calculationLinklink:definitionLink00105 - Statement - Consolidated Balance Sheets (Parenthetical)link:presentationLinklink:calculationLinklink:definitionLink00405 - Statement - Consolidated Statements Of Capitalization (Parenthetical)link:presentationLinklink:calculationLinklink:definitionLink00500 - Statement - Consolidated Statements Of Equitylink:presentationLinklink:calculationLinklink:definitionLink00505 - Statement - Consolidated Statements Of Equity (Parenthetical)link:presentationLinklink:calculationLinklink:definitionLink00605 - Statement - Consolidated Statements Of Cash Flow (Parenthetical)link:presentationLinklink:calculationLinklink:definitionLink10101 - Disclosure - Basis Of Presentationlink:presentationLinklink:calculationLinklink:definitionLink10201 - Disclosure - Revenue Recognitionlink:presentationLinklink:calculationLinklink:definitionLink10301 - Disclosure - Acquisitionslink:presentationLinklink:calculationLinklink:definitionLink10401 - Disclosure - Dispositionslink:presentationLinklink:calculationLinklink:definitionLink10501 - Disclosure - Goodwilllink:presentationLinklink:calculationLinklink:definitionLink10601 - Disclosure - Capitalizationlink:presentationLinklink:calculationLinklink:definitionLink10701 - Disclosure - Financial Instrumentslink:presentationLinklink:calculationLinklink:definitionLink10801 - Disclosure - Net Income Per Common Sharelink:presentationLinklink:calculationLinklink:definitionLink10901 - Disclosure - Stock-Based Compensationlink:presentationLinklink:calculationLinklink:definitionLink11001 - Disclosure - Pension Plans And Other Postretirement Benefitslink:presentationLinklink:calculationLinklink:definitionLink11101 - Disclosure - Rate Activitylink:presentationLinklink:calculationLinklink:definitionLink11201 - Disclosure - Taxes Other Than Income Taxeslink:presentationLinklink:calculationLinklink:definitionLink11301 - Disclosure - Segment Informationlink:presentationLinklink:calculationLinklink:definitionLink11401 - Disclosure - Commitments And Contingencieslink:presentationLinklink:calculationLinklink:definitionLink11501 - Disclosure - Income Taxeslink:presentationLinklink:calculationLinklink:definitionLink11601 - Disclosure - Recent Accounting Pronouncements and Disclosure Ruleslink:presentationLinklink:calculationLinklink:definitionLink30203 - Disclosure - Revenue Recognition (Tables)link:presentationLinklink:calculationLinklink:definitionLink30503 - Disclosure - Goodwill (Tables)link:presentationLinklink:calculationLinklink:definitionLink30703 - Disclosure - Financial Instruments (Tables)link:presentationLinklink:calculationLinklink:definitionLink30803 - Disclosure - Net Income Per Common Share (Tables)link:presentationLinklink:calculationLinklink:definitionLink30903 - Disclosure - Stock-Based Compensation (Tables)link:presentationLinklink:calculationLinklink:definitionLink31003 - Disclosure - Pension Plans And Other Postretirement Benefits (Tables)link:presentationLinklink:calculationLinklink:definitionLink31203 - Disclosure - Taxes Other Than Income Taxes (Tables)link:presentationLinklink:calculationLinklink:definitionLink31303 - Disclosure - Segment Information (Tables)link:presentationLinklink:calculationLinklink:definitionLink40202 - Disclosure - Revenue Recognition (Schedule Of Disaggregation Of Revenue) (Details)link:presentationLinklink:calculationLinklink:definitionLink40301 - Disclosure - Acquisitions (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink40401 - Disclosure - Dispositions (Details)link:presentationLinklink:calculationLinklink:definitionLink40501 - Disclosure - Goodwill (Schedule Of Goodwill) (Details)link:presentationLinklink:calculationLinklink:definitionLink40601 - Disclosure - Capitalization (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink40701 - Disclosure - Financial Instruments (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink40703 - Disclosure - Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details)link:presentationLinklink:calculationLinklink:definitionLink40801 - Disclosure - Net Income Per Common Share (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink40901 - Disclosure - Stock-Based Compensation (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink40902 - Disclosure - Stock-Based Compensation (Summary Of Compensation Costs) (Details)link:presentationLinklink:calculationLinklink:definitionLink40903 - Disclosure - Stock-Based Compensation (Summary Of PSU Transactions) (Details)link:presentationLinklink:calculationLinklink:definitionLink40904 - Disclosure - Stock-Based Compensation (Summary Of RSU Transactions) (Details)link:presentationLinklink:calculationLinklink:definitionLink40905 - Disclosure - Stock-Based Compensation (Assumptions Used In The Pricing Model) (Details)link:presentationLinklink:calculationLinklink:definitionLink40906 - Disclosure - Stock-Based Compensation (Summary Of Stock Option Transactions) (Details)link:presentationLinklink:calculationLinklink:definitionLink40907 - Disclosure - Stock-Based Compensation (Summary Of Restricted Stock Transactions) (Details)link:presentationLinklink:calculationLinklink:definitionLink41101 - Disclosure - Rate Activity (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink41201 - Disclosure - Taxes Other Than Income Taxes (Components Of Taxes Other Than Income Taxes) (Details)link:presentationLinklink:calculationLinklink:definitionLink41301 - Disclosure - Segment Information (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink41302 - Disclosure - Segment Information (Company's Segment Information, Continuing Operations) (Details)link:presentationLinklink:calculationLinklink:definitionLink41303 - Disclosure - Segment Information (Company's Segment Information, Assets) (Details)link:presentationLinklink:calculationLinklink:definitionLink41401 - Disclosure - Commitments And Contingencies (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink41501 - Disclosure - Income Taxes (Narrative) (Details)link:presentationLinklink:calculationLinklink:definitionLink20101 - Disclosure - Basis Of Presentation (Policy)link:presentationLinklink:calculationLinklink:definitionLink