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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Millions
 12 Months Ended
Mar. 31, 2021
CAD ($)
business_segments
Mar. 31, 2020
CAD ($)
Disclosure of detailed information about property, plant and equipment [line items]    
Number of operating segments | business_segments 3  
Increase In royalty obligations, impact of 1% change in growth rate | $ $ 2.3 $ 2.8
Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Expected warranty claims period 1 year  
Growth rate used to extrapolate cash flow projections 2.00%  
Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Expected warranty claims period 7 years  
Growth rate used to extrapolate cash flow projections 3.00%  
Government royalties | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Growth rate used to extrapolate cash flow projections 3.00%  
Discount rate for government royalty payments 6.00%  
Government royalties | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Growth rate used to extrapolate cash flow projections 9.00%  
Discount rate for government royalty payments 12.00%  
Capitalized development costs    
Disclosure of detailed information about property, plant and equipment [line items]    
Average remaining amortization period 5 years 3 months 18 days 5 years 2 months 12 days
Capitalized development costs | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 3 years  
Capitalized development costs | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 10 years  
Customer relationships | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 3 years  
Customer relationships | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 20 years  
Licenses | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 3 years  
Licenses | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 20 years  
ERP and other software | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 3 years  
ERP and other software | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 10 years  
Other intangible assets | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 2 years  
Other intangible assets | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, intangible assets other than goodwill 40 years  
Buildings and land    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, right of use assets 40 years  
Simulators    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, right of use assets 25 years  
Machinery and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, right of use assets 7 years  
Buildings and improvements | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Amortization rate, property, plant and equipment 2.50%  
Useful lives, property, plant and equipment 3 years  
Buildings and improvements | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Amortization rate, property, plant and equipment 10.00%  
Useful lives, property, plant and equipment 40 years  
Simulators    
Disclosure of detailed information about property, plant and equipment [line items]    
Average remaining amortization period 12 years 2 months 12 days 12 years
Simulators | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, property, plant and equipment 25 years  
Machinery and equipment | Bottom of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Amortization rate, property, plant and equipment 20.00%  
Useful lives, property, plant and equipment 2 years  
Machinery and equipment | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Amortization rate, property, plant and equipment 35.00%  
Useful lives, property, plant and equipment 15 years  
Aircraft | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Useful lives, property, plant and equipment 25 years  
Aircraft engines | Top of range    
Disclosure of detailed information about property, plant and equipment [line items]    
Utilization rate, property plant and equipment 3500 hours