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Consolidated Statements of Changes in Equity - CAD ($) $ in Millions | Total | Issued capital [member] Class A Common Shares [member] | Issued capital [member] Class B subordinate voting shares [member] | Retained earnings [member] | Additional paid-in capital [member] | Accumulated other comprehensive income attributable to shareholders of the company [member] | Non-controlling interests [member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning of year at Dec. 31, 2016 |  | $ 7 | $ 6,637 | $ 10,720 | $ 193 | $ 450 | $ 159
Profit for the year attributable to non-controlling interests | $ 29 |  |  |  |  |  | 29
Share option compensation expense (Note 23(c)) |  |  |  |  | 17 |  |
Profit for the year attributable to shareholders of the company | 2,460 |  |  | 2,460 |  |  |
Other comprehensive income (loss) attributable to non-controlling interests | (8) |  |  |  |  |  | (8)
Other comprehensive income (loss) | (77) |  |  |  |  | (77) |
Transfer to Class B subordinate voting shares on exercise of options |  |  |  |  | (8) |  |
Dividends paid (Note 23(g)) |  |  |  | (344) |  |  |
Share repurchases (Note 23(h)) |  |  | (69) | (106) |  |  |
Issued on exercise of options (Note 23(c)) |  |  | 34 |  |  |  |
Class A shares conversion (Note 23(b)) |  | (1) | 1 |  |  |  |
Purchase of non-controlling interests (Note 5(a)) |  |  |  | (63) |  |  |
Acquisition of AQM Copper Inc. |  |  |  |  |  |  | 18
Less remeasurements of retirement benefit plans recorded in retained earnings |  |  |  | 129 |  | (129) |
Dividends or distributions |  |  |  |  |  |  | (56)
End of year at Dec. 31, 2017 | 19,993 | 6 | 6,603 | 12,796 | 202 | 244 | 142
IFRS 9 transition adjustment on January 1, 2018 (Note 32(c)) | (34) |  |  | 34 |  | (34) |
Profit for the year attributable to non-controlling interests | 38 |  |  |  |  |  | 38
Share option compensation expense (Note 23(c)) |  |  |  |  | 17 |  |
Profit for the year attributable to shareholders of the company | 3,107 |  |  | 3,107 |  |  |
Other comprehensive income (loss) attributable to non-controlling interests | 10 |  |  |  |  |  | 10
Other comprehensive income (loss) | 382 |  |  |  |  | 382 |
Transfer to Class B subordinate voting shares on exercise of options |  |  |  |  | (15) |  |
Dividends paid (Note 23(g)) |  |  |  | (172) |  |  |
Share repurchases (Note 23(h)) |  |  | (77) | (119) |  |  |
Issued on exercise of options (Note 23(c)) |  |  | 69 |  |  |  |
Purchase of non-controlling interests (Note 5(a)) |  |  |  | (159) |  |  | (16)
Less remeasurements of retirement benefit plans recorded in retained earnings |  |  |  | 8 |  | (8) |
Dividends or distributions |  |  |  |  |  |  | (40)
End of year at Dec. 31, 2018 | $ 23,018 | $ 6 | $ 6,595 | $ 15,495 | $ 204 | $ 584 | $ 134

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