v3.26.1
OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION - Assets And Liabilities Employed By Segment (Details) - CAD ($)
$ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of operating segments [line items]    
Total assets $ 11,147.8 $ 11,213.8
Total liabilities 5,759.7 6,237.8
Operating segments | Civil Aviation    
Disclosure of operating segments [line items]    
Total assets 6,896.4 7,263.4
Total liabilities 1,129.9 1,369.1
Operating segments | Defense and Security    
Disclosure of operating segments [line items]    
Total assets 3,046.5 3,000.6
Total liabilities 1,074.9 1,009.3
Unallocated amounts    
Disclosure of operating segments [line items]    
Total assets 1,204.9 949.8
Total liabilities $ 3,554.9 $ 3,859.4