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LEASES - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disclosure of leases [Abstract]
Depreciation	$ 48.4	$ 50.1
Short-term lease, low-value assets, and variable lease payments expenses	15.4	19.5
Net book value of property, plant and equipment leased under operating lease to third parties	$ 51.8	$ 58.2

X

- Definition

Disclosure of leases [Abstract]

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No definition available.

+ Details

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X

- Definition

Expense Relating To Short-Term Leases, Low-Value Assets, And Variable Lease Payments

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No definition available.

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- Definition

Property, Plant And Equipment, Leased Under Operating Lease To Third Parties

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No definition available.

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- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2021-01-01
-Paragraph 53
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_a&doctype=Standard
-URIDate 2021-03-24

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