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RESTRUCTURING, INTEGRATION AND ACQUISITION COSTS - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Disclosure of transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [line items] |  |
Integration and acquisition costs | $ 87.8 | $ 6.9
L3Harris' Military Training business |  |
Disclosure of transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [line items] |  |
Integration and acquisition costs | 63.5 | 4.3
Sabre AirCentre airline operations portfolio |  |
Disclosure of transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [line items] |  |
Integration and acquisition costs | $ 18.1 | $ 0.0

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