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Share-Based Compensation Expenses (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation expenses $ 4.4 $ 10.1
Stock options and restricted share units    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation expenses 5.5 8.2
Deferred share units    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share-based compensation expenses $ (1.1) $ 1.9