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Business Acquisitions - Summary of Consideration of Business Combinations (Detail) - CAD CAD in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about business combination [abstract]
Cash consideration (net of cash acquired)	CAD 13.3
Payments on notes payable from previous acquisitions	66.4
Total net cash paid	CAD 79.7	CAD 1,072.6

X

- Definition

The aggregate cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities. [Refer: Subsidiaries [member]]

+ References

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- Definition

The portion of consideration paid or received, consisting of cash and cash equivalents, in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]; Cash and cash equivalents; Consideration paid (received)]

+ References

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- Definition

Payments on notes payable from previous acquisitions.

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