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OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2019 CAD ($) business_segments | Mar. 31, 2018 CAD ($)
Disclosure of operating segments [abstract] |  |
Number of operating segments | business_segments | 3 |
Royalty agreement, term | 20 years |
Disclosure of operating segments [line items] |  |
Addition of assets through the monetization of royalties | $ 202.7 | $ 0.0
Intangible assets | Civil Aviation Training Solutions |  |
Disclosure of operating segments [line items] |  |
Addition of assets through the monetization of royalties | 156.7 |
Property, plant and equipment | Civil Aviation Training Solutions |  |
Disclosure of operating segments [line items] |  |
Addition of assets through the monetization of royalties | $ 46.0 |

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