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OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Capital Expenditures (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 163.6 | $ 384.0
Operating segments | Civil Aviation Training Solutions |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 116.7 | 296.3
Operating segments | Defence and Security |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | 27.5 | 74.8
Operating segments | Healthcare |  |
Disclosure of operating segments [line items] |  |
Total capital expenditures | $ 19.4 | $ 12.9

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