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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2019
Inventories [Abstract] |
Summary of Inventories | Inventories
(CAD$ in millions) |  | December 31, 2019 |  |  | December 31, 2018 |
Supplies |  | $ | 721 |  |  | $ | 693 |
Raw materials |  | 271 |  |  | 300 |
Work in process |  | 491 |  |  | 595 |
Finished products |  | 573 |  |  | 539 |
|  | 2,056 |  |  | 2,127 |
Less long-term portion (Note 14) |  | (75 | ) |  | (62 | )
|  | $ | 1,981 |  |  | $ | 2,065 |

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