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OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Capital Expenditures (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 395.2 | $ 362.8
Operating segments | Civil Aviation |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 329.2 | 300.7
Operating segments | Defense and Security |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 53.6 | 46.5
Operating segments | Healthcare |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 12.4 | $ 15.6

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