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OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Assets And Liabilities Employed By Segment (Details) - CAD ($) $ in Millions | Mar. 31, 2019 | Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2017
--- | --- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |  |
Assets | $ 7,165.5 | $ 5,780.2 | $ 5,397.7 | $ 5,397.7
Liabilities | 4,755.5 | 3,482.7 | $ 3,385.4 | $ 3,385.4
Operating segments | Civil Aviation Training Solutions |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Assets | 4,373.0 | 3,072.8 |  |
Liabilities | 1,098.3 | 1,031.0 |  |
Operating segments | Defense and Security |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Assets | 1,627.2 | 1,414.0 |  |
Liabilities | 595.2 | 469.8 |  |
Operating segments | Healthcare |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Assets | 271.6 | 253.5 |  |
Liabilities | 48.8 | 42.0 |  |
Unallocated amounts |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Assets | 893.7 | 1,039.9 |  |
Liabilities | $ 3,013.2 | $ 1,939.9 |  |

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