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Pension and Non-pension Post-employment Benefit Plans - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of defined benefit plans [line items]        
Percentage of plan members that are active employees of the Company   1.00%    
Loss on pension annuity purchases (see note 18(a)) $ 0.2 $ 0.0 $ 0.0 $ 0.2
Plan assets, at fair value   $ 214.1 361.9  
Percentage of plan assets held with financial institutions with a rating of A- or above   92.00%    
Number of basis points   1.00%    
Pension Plan        
Disclosure of defined benefit plans [line items]        
Plan assets, at fair value   $ 211.8 359.9  
Plan assets, decrease due to restrictions   (0.9) (1.6)  
Level 1        
Disclosure of defined benefit plans [line items]        
Plan assets, at fair value   32.1 33.2  
Level 3        
Disclosure of defined benefit plans [line items]        
Plan assets, at fair value   $ 182.0 $ 328.7