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INTANGIBLE ASSETS - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disclosure of detailed information about intangible assets [line items] |  |
Increase in discount rate (in percent) | 1.00% |
Decrease in growth rate (in percent) | 1.00% |
Civil Aviation, Defense and Security and Healthcare |  |
Disclosure of detailed information about intangible assets [line items] |  |
Growth rate used to extrapolate cash flow projections (in years) | 5 years |
Bottom of range |  |
Disclosure of detailed information about intangible assets [line items] |  |
Discount rate (in percent) | 8.00% |
Bottom of range | Civil Aviation, Defense and Security and Healthcare |  |
Disclosure of detailed information about intangible assets [line items] |  |
Estimated growth rate (in percent) | 2.00% |
Top of range |  |
Disclosure of detailed information about intangible assets [line items] |  |
Discount rate (in percent) | 15.00% |
Top of range | Civil Aviation, Defense and Security and Healthcare |  |
Disclosure of detailed information about intangible assets [line items] |  |
Estimated growth rate (in percent) | 3.00% |
Cost of sales |  |
Disclosure of detailed information about intangible assets [line items] |  |
Amortization | $ 92.9 | $ 77.2
Research and development expenses |  |
Disclosure of detailed information about intangible assets [line items] |  |
Amortization | 29.0 | 30.6
Selling, general and administrative expenses |  |
Disclosure of detailed information about intangible assets [line items] |  |
Amortization | $ 1.0 | $ 1.7

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