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Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2406402 - Disclosure - Summary of Significant Accounting Policies Recently Issued Accounting Standards (Details) link:presentationLink link:calculationLink link:definitionLink 2107103 - Disclosure - Revenue (Notes) link:presentationLink link:calculationLink link:definitionLink 2208202 - Disclosure - Revenue Revenues (Policies) link:presentationLink link:calculationLink link:definitionLink 2309302 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 2410403 - Disclosure - Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 2411404 - Disclosure - Revenue Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 2412405 - Disclosure - Revenue Costs to Obtain Contracts with Customers (Details) link:presentationLink link:calculationLink link:definitionLink 2113104 - Disclosure - Net Income Per Common Share link:presentationLink link:calculationLink link:definitionLink 2314303 - Disclosure - Net Income Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2415406 - Disclosure - Net Income Per Common Share Net Income per Common Share (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2416407 - Disclosure - Net Income Per Common Share (Summary of Calculation of Basic and Diluted EPS) (Details) link:presentationLink link:calculationLink link:definitionLink 2117105 - Disclosure - Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 2318304 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 2419408 - Disclosure - Long-Term Debt Long-Term Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2420409 - Disclosure - Long-Term Debt (Schedule Of Debt Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 2421410 - Disclosure - Long-Term Debt (Schedule Of Aggregate Maturities For Debt Outstanding) (Details) link:presentationLink link:calculationLink link:definitionLink 2122106 - Disclosure - Business Combinations and Asset Acquisitions link:presentationLink link:calculationLink link:definitionLink 2323305 - Disclosure - Business Combinations and Asset Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 2424411 - Disclosure - Business Combinations and Asset Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 2125107 - Disclosure - Supplementary Balance Sheet Information link:presentationLink link:calculationLink link:definitionLink 2326306 - Disclosure - Supplementary Balance Sheet Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2427412 - Disclosure - Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) link:presentationLink link:calculationLink link:definitionLink 2428413 - Disclosure - Supplementary Balance Sheet Information (Components Of Accounts Payable And Accrued Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2429414 - Disclosure - Supplementary Balance Sheet Information Schedule of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 2130108 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 2331307 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 2432415 - Disclosure - Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 2133109 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 2434416 - Disclosure - Commitments and Contingencies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2135110 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 2336308 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 2437417 - Disclosure - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 2138111 - Disclosure - Share Repurchase Program link:presentationLink link:calculationLink link:definitionLink 2439418 - Disclosure - Share Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 2140112 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 2341309 - Disclosure - Subsequent Events (Tables) link:presentationLink link:calculationLink link:definitionLink 2442419 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink