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DISCONTINUED OPERATIONS - Income statement (Details) - CAD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 16, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |
Revenue |  | $ 4,707.9 | $ 4,282.8
Operating income (loss) |  | 729.2 | (185.4)
Finance expense |  | 215.5 | 205.0
Earnings (loss) before income taxes |  | 513.7 | (390.4)
Income tax recovery |  | 0.0 | (9.4)
Net income from discontinued operations before after-tax gain on disposal |  | 0.0 | 4.8
After-tax gain on disposal of discontinued operations |  | 0.0 | 16.5
Net income from discontinued operations |  | 0.0 | 21.3
Discontinued operations |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |
Revenue |  | 0.0 | 131.7
Expenses |  | 0.0 | 132.7
Operating income (loss) |  | 0.0 | (1.0)
Finance expense |  | 0.0 | 3.6
Earnings (loss) before income taxes |  | $ 0.0 | $ (4.6)
After-tax gain on disposal of discontinued operations | $ 16.5 |  |

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- Definition The gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation. [Refer: Discontinued operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2024-01-01 -Paragraph 33 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2024-en-r&anchor=para_33_b_iii&doctype=Standard -URIDate 2024-03-27 + Details
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