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Financial assets and liabilities - Other financing agreements (Details)
Nov. 30, 2023
Oct. 31, 2023
Sep. 30, 2023
Acquisition of engines with Tarquin Limited      
Disclosure of detailed information about borrowings [line items]      
Annual interest rate     6.20%
Acquisition of engines with NBB-V11218      
Disclosure of detailed information about borrowings [line items]      
Annual interest rate     6.20%
Acquisition of engines with NBB-V11951      
Disclosure of detailed information about borrowings [line items]      
Annual interest rate     6.20%
Acquisition of several engines with Wilmington Trust SP Services (Dublin)      
Disclosure of detailed information about borrowings [line items]      
Annual interest rate   7.16% 7.16%
Acquisition of engines with NBB Pintail Co., LTD      
Disclosure of detailed information about borrowings [line items]      
Annual interest rate 6.99%