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summary of significant accounting policies - Inventories (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017
Inventory
Wireless handsets, parts and accessories	$ 320	$ 322	$ 268
Costs of goods sold	$ 2,144	$ 1,975

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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.

+ References

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- Definition

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No definition available.

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X

- Definition

A classification of inventory that includes wireless handsets, parts and accessories.

+ References

No definition available.

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