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Provisions and Other Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block [abstract] |
Summary of Provisions and Other Liabilities |
(CAD$ in millions) |  | December 31, 2018 |  |  | December 31, 2017 |
Provisions (a) |  | $ | 1,653 |  |  | $ | 1,905 |
Derivative liabilities (net of current portion of $6 (2017 – $nil)) |  |  | 39 |  |  |  | 43 |
IMSA payable |  |  | 58 |  |  |  | — |
Other |  |  | 42 |  |  |  | 29 |
|  | $ | 1,792 |  |  | $ | 1,977 |
Summary of Movements in Provisions | The following table summarizes the movements in provisions for the year ended December 31, 2018:
(CAD$ in millions) |  | Decommissioning and Restoration Provisions |  |  | Other |  |  | Total |
As at January 1, 2018 |  | $ | 1,844 |  |  | $ | 194 |  |  | $ | 2,038 |
Settled during the year |  |  | (76 | ) |  |  | (29 | ) |  |  | (105 | )
Change in discount rate |  |  | (409 | ) |  |  | — |  |  |  | (409 | )
Change in amount and timing of cash flows |  |  | 111 |  |  |  | 18 |  |  |  | 129 |
Accretion |  |  | 101 |  |  |  | 2 |  |  |  | 103 |
Other |  |  | (2 | ) |  |  | — |  |  |  | (2 | )
Changes in foreign exchange rates |  |  | 45 |  |  |  | 9 |  |  |  | 54 |
As at December 31, 2018 |  |  | 1,614 |  |  |  | 194 |  |  |  | 1,808 |
Less current portion of provisions (Note 18) |  |  | (91 | ) |  |  | (64 | ) |  |  | (155 | )
Long-term provisions |  | $ | 1,523 |  |  | $ | 130 |  |  | $ | 1,653 |

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