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Inventories - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of inventories [abstract]
Cost of sales	$ 7,943	$ 7,343
inventories recognized as expense	7,300	6,600
Net realizable value of inventories	172	17
Inventory write downs	82	20
Reversal of inventory write-downs	$ 0	$ 30

X

- Definition

The amount of inventories recognised as an expense during the period. [Refer: Inventories]

+ References

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- Definition

The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories.

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- Definition

The amount of inventories carried at net realisable value. [Refer: Inventories]

+ References

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- Definition

The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories]

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- Definition

The amount recognised as a reduction in the amount of inventories recognised as an expense due to the reversal of any write-down of inventories resulting from an increase in net realisable value. [Refer: Inventories; Inventory write-down]

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