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Investments in Associates and Joint Ventures (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Investments in Associates and Joint Ventures |
(CAD$ in millions) |  | NuevaUnión |  |  | Other |  |  | Total |
At January 1, 2016 |  | $ | 959 |  |  | $ | 58 |  |  | $ | 1,017 |
Contributions |  |  | 13 |  |  |  | 8 |  |  |  | 21 |
Changes in foreign exchange rates |  |  | (28 | ) |  |  | (1 | ) |  |  | (29 | )
Share of income |  |  | 2 |  |  |  | — |  |  |  | 2 |
Share of other comprehensive income |  |  | — |  |  |  | 1 |  |  |  | 1 |
At December 31, 2016 |  | $ | 946 |  |  | $ | 66 |  |  | $ | 1,012 |
Contributions |  |  | 43 |  |  |  | 4 |  |  |  | 47 |
Changes in foreign exchange rates |  |  | (64 | ) |  |  | 1 |  |  |  | (63 | )
Share of income |  |  | 4 |  |  |  | 2 |  |  |  | 6 |
Share of other comprehensive income |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Acquisition of AQM Copper Inc. |  |  | — |  |  |  | (58 | ) |  |  | (58 | )
At December 31, 2017 |  | $ | 929 |  |  | $ | 14 |  |  | $ | 943 |

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- Definition Disclosure of investments in subsidiaries joint ventures and associates. + References No definition available. + Details
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