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SUPPLEMENTARY CASH FLOWS INFORMATION (Tables)
 12 Months Ended
Mar. 31, 2021
Cash Flow Statement [Abstract]  
Analysis of Non-Cash Working Capital
Changes in non-cash working capital are as follows:
20212020
Cash (used in) provided by non cash working capital:
Accounts receivable$32.6 $(39.9)
Contract assets75.5 (29.9)
Inventories43.4 (87.5)
Prepayments2.3 (0.9)
Income taxes (12.0)8.2 
Accounts payable and accrued liabilities(54.0)53.5 
Provisions27.7 (6.5)
Contract liabilities(165.0)50.8 
$(49.5)$(52.2)
Supplemental Cash Flow Information
Supplemental information:
 20212020
Interest paid $98.0 $108.7 
Interest received 13.2 11.4 
Income taxes paid 26.4 34.2