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Debentures (Tables)
 6 Months Ended
Aug. 31, 2024
Debt Disclosure [Abstract]  
Convertible Debt
The following table summarizes the change in the Notes for the six months ended August 31, 2024:
Carrying Amount
Balance as at February 29, 2024$194 
Amortization of debt issuance costs1 
Balance as at August 31, 2024$195 
1.75% Debenture - impact of changes in fair value
The following table shows the impact of the changes in fair value of the Debentures for the three and six months ended August 31, 2024 and August 31, 2023:    
Three Months EndedSix Months Ended
  August 31, 2024August 31, 2023August 31, 2024August 31, 2023
Income (charge) associated with the change in fair value from non-credit components recorded in the consolidated statements of operations $— $6 $— $(16)
Total decrease (increase) in the fair value of the 2020 Debentures $— $6 $— $(16)