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LEASES - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
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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

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- Definition Disclosure of leases [Abstract] + References No definition available. + Details
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- Definition Expense Relating To Short-Term Leases, Low-Value Assets, And Variable Lease Payments + References No definition available. + Details
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- Definition Property, Plant And Equipment, Leased Under Operating Lease To Third Parties + References No definition available. + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References 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 + Details
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