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Financial Instruments and Risk Management - Interest Rate Risk (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Feb. 28, 2022
Dec. 06, 2021
Sep. 30, 2021
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Nov. 30, 2018
Jun. 30, 2018
Minimum                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Reasonably possible change in risk variable, impact on unrealized loss $ 1,000,000.0                  
Maximum | Interest rate swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Reasonably possible change in risk variable, impact on unrealized loss 1,000,000.0                  
Borrowings 0 $ 0                
Fair value gain/(loss) (1,200,000) (23,300,000)                
Contract amount of U.S. dollars 539,500,000 562,600,000                
Interest rate swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Reasonably possible change in risk variable, impact on interest expense 6,600,000                  
Gains on change in fair value of derivatives 500,000 0                
Losses on change in fair value of derivatives 7,400,000                  
Reasonably possible change in risk variable, unhedged items, impact on interest expense $ 4,600,000                  
Reasonably possible change in risk variable, percentage 1.00%                  
Fair value gain/(loss) $ 6,900,000 16,500,000                
Reasonable possible change in risk variable, decrease in unrealized loss, percentage 0.25%                  
Reasonable possible change in risk variable, unrealized loss, percentage 0.25%                  
Foreign currency forwards and swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Reasonably possible change in risk variable, percentage 1.00%                  
New credit facility                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings $ 660,400,000                  
Contract amount of U.S. dollars             $ 800,000,000.0      
Credit Facility                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings 660,400,000 470,400,000                
Incremental Term Loan                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings 0 175,000,000.0             $ 250,000,000.0  
Hedged item, subject to cancellation 75,000,000.0                  
Unhedged borrowings 265,000,000.0 75,000,000.0                
Contract amount of U.S. dollars 0 100,000,000.0                
Incremental Term Loan | Initial Swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, subject to cancellation         $ 75,000,000.0          
Incremental Term Loan | Interest rate swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Contract amount of U.S. dollars 50,000,000.0                  
Term Loans                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings 660,400,000 470,400,000       $ 592,300,000   $ 598,300,000    
Unhedged borrowings 460,400,000 195,400,000                
Contract amount of U.S. dollars 200,000,000.0 275,000,000.0                
Term Loans | Interest rate swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities $ 200,000,000.0                  
Percentage of debt hedged 30.00%                  
Contract amount of U.S. dollars $ 200,000,000.0                  
Initial Term Loan                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings 295,400,000 295,400,000               $ 350,000,000.0
Unhedged borrowings 195,400,000 120,400,000                
Contract amount of U.S. dollars 100,000,000.0 175,000,000.0         $ 350,000,000.0      
Initial Term Loan | Interest rate swaps | Initial Swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities 100,000,000.0                  
Initial Term Loan | Interest rate swaps | Initial Swaps | Interest rate swap                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities     $ 100,000,000.0              
Initial Term Loan | Interest rate swaps | First Extended Initial Swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities 100,000,000.0                  
First Incremental Term Loan | Interest rate swaps | Incremental Swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities 100,000,000.0                  
Second Incremental Term Loan                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Borrowings 365,000,000.0 0   $ 365,000,000.0            
Contract amount of U.S. dollars 100,000,000.0 0                
Second Incremental Term Loan | Interest rate swaps | Incremental Swaps                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities 100,000,000.0                  
Second Incremental Term Loan | Interest rate swaps | Incremental Swaps | Interest rate swap                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities     100,000,000.0              
Hedged item, subject to cancellation     50,000,000.0              
Second Incremental Term Loan | Interest rate swaps | Additional Incremental Swaps | Interest rate swap                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Hedged item, liabilities     $ 130,000,000.0              
Revolving Credit Facility                    
Disclosure of nature and extent of risks arising from financial instruments [line items]                    
Unhedged borrowings $ 0 $ 0