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OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Capital Expenditures (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 362.8 | $ 163.6
Operating segments | Civil Aviation |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 300.7 | 116.7
Operating segments | Defense and Security |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 46.5 | 27.5
Operating segments | Healthcare |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 15.6 | $ 19.4

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