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SUPPLEMENTARY CASH FLOWS INFORMATION (Details) - CAD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Cash Flow Statement [Abstract] |  |
Accounts receivable | $ 32.6 | $ (39.9)
Contract assets | 75.5 | (29.9)
Inventories | 43.4 | (87.5)
Prepayments | 2.3 | (0.9)
Income taxes | (12.0) | 8.2
Accounts payable and accrued liabilities | (54.0) | 53.5
Provisions | 27.7 | (6.5)
Contract liabilities | (165.0) | 50.8
Increase (decrease) in working capital | (49.5) | (52.2)
Interest paid | 98.0 | 108.7
Interest received | 13.2 | 11.4
Income taxes paid | $ 26.4 | $ 34.2

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