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Consolidated Statements of Changes in Equity - CAD ($) $ in Millions | Total | Issued capital Class A Common Shares | Issued capital Class B Subordinate Voting Shares | Retained earnings | Contributed surplus | Accumulated other comprehensive income | Non-controlling interests
--- | --- | --- | --- | --- | --- | --- | ---
Beginning of year at Dec. 31, 2019 |  |  | $ 6,323 | $ 14,447 | $ 219 | $ 309 | $ 770
Issued on exercise of options |  |  | 1 |  | 0 |  |
Profit (loss) for the year attributable to shareholders of the company | $ (864) |  |  | (864) |  |  |
Dividends paid (Note 24(g)) |  |  |  | (106) |  |  |
Share repurchases |  |  | (190) | (17) |  |  |
Remeasurements of retirement benefit plans | 50 |  |  | 50 |  | 50 |
Share option compensation expense (Note 24(c)) |  |  |  |  | 23 |  |
Other comprehensive income (loss) | (112) |  |  |  |  | (112) |
Profit (loss) for the year attributable to non-controlling interests | (80) |  |  |  |  |  | (80)
Other comprehensive income (loss) attributable to non-controlling interests | (14) |  |  |  |  |  | (14)
Contributions from non-controlling interests |  |  |  |  |  |  | 2
Distributions to non-controlling interests |  |  |  |  |  |  | (9)
End of year at Dec. 31, 2020 | 20,708 | $ 6 | 6,134 | 13,410 | 242 | 247 | 669
Issued on exercise of options |  |  | 67 |  | (17) |  |
Profit (loss) for the year attributable to shareholders of the company | 2,868 |  |  | 2,868 |  |  |
Dividends paid (Note 24(g)) |  |  |  | (106) |  |  |
Share repurchases |  |  | 0 | 0 |  |  |
Remeasurements of retirement benefit plans | (171) |  |  | (171) |  | (171) |
Share option compensation expense (Note 24(c)) |  |  |  |  | 28 |  |
Other comprehensive income (loss) | 126 |  |  |  |  | 126 |
Profit (loss) for the year attributable to non-controlling interests | 47 |  |  |  |  |  | 47
Other comprehensive income (loss) attributable to non-controlling interests | (4) |  |  |  |  |  | (4)
Contributions from non-controlling interests |  |  |  |  |  |  | 113
Distributions to non-controlling interests |  |  |  |  |  |  | (57)
End of year at Dec. 31, 2021 | $ 23,773 | $ 6 | $ 6,201 | $ 16,343 | $ 253 | $ 202 | $ 768

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