The gains (losses) on available-for-sale financial assets. [Refer: Financial assets available-for-sale]

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The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

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The cash outflow for the purchase of investments other than investments accounted for using equity method. [Refer: Investments accounted for using equity method; Investments other than investments accounted for using equity method]

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Note 11 - Investments (Details Textual) - CAD ($) $ in Millions		12 Months Ended
	Aug. 10, 2012	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Statement Line Items [Line Items]
Proportion of ownership interest in associate		8.00%
Ecobee [member]
Statement Line Items [Line Items]
Purchase of investments other than investments accounted for using equity method	$ 6.4		$ 0.4	$ 5.4
Proportion of ownership interest in associate		8.00%
Gains (losses) on available-for-sale financial assets		$ 32.9	$ 32.4