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v3.19.3.a.u2

Inventory Change in Inventory (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of inventories [Abstract] |  |
Inventories at the beginning of the period | $ 242 | $ 219
Net addition |  | 20
Change in foreign exchange rates | (3) | 3
Net addition | 12 |
Inventories at the end of the period | $ 251 | $ 242

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