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BALANCE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue that was included in contract liability balance | $ 632.2 | $ 482.6
(Reversal of) revenue from performance obligations satisfied or partially satisfied in previous periods | (11.3) | $ (55.5)
Remaining performance obligations | $ 5,956.0 |
No later than 1 year |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Performance obligations recognition expectation (in percent) | 40.00% |
Later than one year |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Performance obligations recognition expectation (in percent) | 26.00% |

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- Definition The amount of revenue from performance obligations satisfied (or partially satisfied) in previous periods. [Refer: Performance obligations [member]; Revenue from contracts with customers] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 116 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_116_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of revenue that was included in the contract liability balance at the beginning of the period. [Refer: Contract liabilities; Revenue from contracts with customers] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 116 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_116_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 120 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_120_a&doctype=Standard -URIDate 2022-03-24 + Details
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