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Other Liabilities and Provisions (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Summary of Other Liabilities and Provisions |
(CAD$ in millions) |  | December 31, 2017 |  |  | December 31, 2016 |
Provisions (a) |  | $ | 1,905 |  |  | $ | 1,236 |
Derivative liabilities (net of current portion of $nil (2016 —$5 million)) |  |  | 43 |  |  |  | 21 |
Other |  |  | 29 |  |  |  | 65 |
|  | $ | 1,977 |  |  | $ | 1,322 |
Summary of Movements in Provisions | The following table summarizes the movements in provisions for the year ended December 31, 2017:
(CAD$ in millions) |  | Decommissioning and Restoration Provisions |  |  | Other |  |  | Total |
As at January 1, 2017 |  | $ | 1,220 |  |  | $ | 87 |  |  | $ | 1,307 |
Settled during the year |  |  | (39 | ) |  |  | (10 | ) |  |  | (49 | )
Change in discount rate |  |  | 210 |  |  |  | — |  |  |  | 210 |
Change in amount and timing of cash flows |  |  | 406 |  |  |  | 121 |  |  |  | 527 |
Accretion |  |  | 81 |  |  |  | — |  |  |  | 81 |
Other |  |  | (2 | ) |  |  | — |  |  |  | (2 | )
Changes in foreign exchange rates |  |  | (32 | ) |  |  | (4 | ) |  |  | (36 | )
As at December 31, 2017 |  |  | 1,844 |  |  |  | 194 |  |  |  | 2,038 |
Less current portion of provisions (Note 17) |  |  | (83 | ) |  |  | (50 | ) |  |  | (133 | )
Long-term provisions |  | $ | 1,761 |  |  | $ | 144 |  |  | $ | 1,905 |

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