0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - INTERIM CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - INTERIM CONSOLIDATED BALANCE SHEETS AS AT link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (PARENTHETICAL) link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Description of business and basis of presentation link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Accounting changes link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Gain on sale of equity investment link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Earnings per share link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Changes in Accumulated other comprehensive income ("AOCI") by component link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Accounts receivable, net link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Financial instruments link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Share repurchases link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Pension and other benefits link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Stock-based compensation link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Contingencies link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Description of business and basis of presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Earnings per share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Changes in Accumulated other comprehensive income ("AOCI") by component (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Accounts receivable, net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Share repurchases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Pension and other benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Description of business and basis of presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Gain on sale of equity investment (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Earnings per share - Schedule of Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Earnings per share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Changes in Accumulated other comprehensive income ("AOCI") by component (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Accounts receivable, net (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Financial instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Share repurchases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Share repurchases - Schedule of Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Pension and other benefits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Pension and other benefits - Net Periodic Benefit Cost for DB Pension Plans and Other Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Stock-based compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink