0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Description of business, including segment and geographic area information link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Basis of presentation and significant accounting policies and practices link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Valuation of debt and equity investments and certain liabilities link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Postretirement benefit plans link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Debt and lines of credit link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Stockholders' equity link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Contingencies link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Supplemental financial information link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Basis of presentation and significant accounting policies and practices (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Description of business, including segment and geographic area information (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - Basis of presentation and significant accounting policies and practices (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - Income taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - Valuation of debt and equity investments and certain liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - Postretirement benefit plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - Debt and lines of credit (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - Stockholders' equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - Supplemental financial information (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - Description of business, including segment and geographic area information - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - Description of business, including segment and geographic area information - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - Description of business, including segment and geographic area information - Geographic Area Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - Basis of presentation and significant accounting policies and practices - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - Basis of presentation and significant accounting policies and practices - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - Income taxes - Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Income taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Valuation of debt and equity investments and certain liabilities - Investments at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Valuation of debt and equity investments and certain liabilities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Valuation of debt and equity investments and certain liabilities - Aggregate Liabilities of Our Available-for-Sale Debt Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Valuation of debt and equity investments and certain liabilities - Fair Value Assets and Liabilities Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Postretirement benefit plans (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Debt and lines of credit - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Debt and lines of credit - Schedule of Long-term Debt Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Debt and lines of credit - Schedule of Long-term Debt Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Stockholders' equity (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Supplemental financial information - Restructuring Charges, Other (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Supplemental financial information -Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Supplemental financial information - Other Long-Term Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Supplemental financial information - Other Long-Term Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - Supplemental financial information - Amounts Reclassified out of AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - Supplemental financial information - Treasury Stock (Details) link:presentationLink link:calculationLink link:definitionLink