Inventories - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
Jan. 31, 2019	Jan. 31, 2018
Inventories [abstract]
Write down on inventories	$ 18.5	$ 10.1
Reversed write downs of inventories	4.4	5.0
Cost of sales	$ 3,543.2	$ 3,050.8

Inventories [abstract]

No definition available.

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- Definition

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

+ References

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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]

+ References

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