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Disclosure - Nature of Operations and Summary of Significant Accounting Policies Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Nature of Operations and Summary of Significant Accounting Policies Purchase of Investment (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Reportable Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Treasury Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Revenue and Deferred Costs Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Revenue and Deferred Costs Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Revenue and Deferred Costs Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Revenue and Deferred Costs Contract Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Fair Value Measures and Disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Leases Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Leases Lease Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Other Assets Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Other Assets Other Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - 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Disclosure - Reportable Segment Information Reconciliation of Operating Profit by Segment to Consolidated (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink