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Deferred Consideration (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Movements in Deferred Consideration | The following table summarizes the movements in deferred consideration for the years ended December 31, 2017, and 2016:
(CAD$ in millions) |  | 2017 |  |  | 2016 |
As at January 1 |  | $ | 755 |  |  | $ | 816 |
Recognized in profit |  |  | (32 | ) |  |  | (36 | )
Changes in foreign exchange rates |  |  | (49 | ) |  |  | (25 | )
As at December 31 |  | $ | 674 |  |  | $ | 755 |
Less current portion of deferred consideration (Note 17) |  |  | (23 | ) |  |  | (32 | )
Long-term deferred consideration |  | $ | 651 |  |  | $ | 723 |

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