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 9955511 - Disclosure - Basis of presentation and significant accounting policies and practices (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Description of business, including segment and geographic area information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Basis of presentation and significant accounting policies and practices (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Income taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Valuation of debt and equity investments and certain liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Postretirement benefit plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Debt and lines of credit (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Stockholders' equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Supplemental financial information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Description of business, including segment and geographic area information - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Description of business, including segment and geographic area information - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Description of business, including segment and geographic area information - Geographic Area Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Basis of presentation and significant accounting policies and practices - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Basis of presentation and significant accounting policies and practices - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Income taxes - Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Income taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Valuation of debt and equity investments and certain liabilities - Investments at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Valuation of debt and equity investments and certain liabilities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - 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 9955530 - 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 9955531 - Disclosure - Postretirement benefit plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Debt and lines of credit - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Debt and lines of credit - Schedule of Long-term Debt Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Debt and lines of credit - Schedule of Long-term Debt Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Stockholders' equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Supplemental financial information - Restructuring Charges, Other (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Supplemental financial information -Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Supplemental financial information - Other Long-Term Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Supplemental financial information - Amounts Reclassified out of AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Supplemental financial information - Treasury Stock (Details) link:presentationLink link:calculationLink link:definitionLink