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Financial instruments and derivatives - Additional Information (Details)
$ in Thousands, MMBTU in Millions
 12 Months Ended
Sep. 17, 2024
USD ($)
Apr. 15, 2024
USD ($)
Dec. 31, 2024
USD ($)
MMBTU
t
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Aug. 29, 2024
USD ($)
bank
Apr. 30, 2024
USD ($)
Derivative [Line Items]              
Other comprehensive loss     $ (136,849) $ 63,391 $ (70,198)    
Loss on settlement of derivative $ (11,088)            
Total fair value of other derivatives not designated as hedging instruments     (2,694) (6,790)      
Cash Flow Hedges | Derivatives designated as hedging instruments:              
Derivative [Line Items]              
Price risk cash flow hedge derivative, at fair value, net     652 (41)      
Commodity loss expected to be reclassified to the income statement during the next 12 months     652        
Fair value of foreign currency cash flow hedges, gain     (1,841) 1,502      
Foreign currency gain (loss) expected to be reclassified to the income statement during the next 12 months     $ (1,841)        
Net investment hedge | Derivatives designated as hedging instruments: | Currency Swap              
Derivative [Line Items]              
Received a cash settlement   $ 9,068          
Foreign currency translation gain   $ 3,143          
Natural gas swaps | Derivatives not designated as hedging instruments:              
Derivative [Line Items]              
Anticipated usage percentage covered by a swap contract for the next fiscal year (percent)     0.755        
Approximate amount of commodity covered by swap contracts outstanding (btu) | MMBTU     5.2        
Natural gas swaps | Cash Flow Hedges | Derivatives designated as hedging instruments:              
Derivative [Line Items]              
Approximate amount of commodity covered by swap contracts outstanding (tonne) | t     3,546        
Aluminum Swaps | Cash Flow Hedges | Derivatives designated as hedging instruments:              
Derivative [Line Items]              
Anticipated usage percentage covered by a swap contract for the next fiscal year (percent)     0.24        
Currency Swap | Net investment hedge              
Derivative [Line Items]              
Notional amount     $ 1,500,000 500,000     $ 500,000
Loss on derivative used in net investment hedge, after tax     11,919 (5,073)      
Other comprehensive loss     8,880 (3,779)      
Net investment hedges, tax     3,039 $ (1,294)      
Currency Swap Maturing September 1, 2026 | Net investment hedge              
Derivative [Line Items]              
Notional amount     500,000        
Currency Swap Maturing September 1, 2029 | Net investment hedge              
Derivative [Line Items]              
Notional amount     500,000        
Currency Swap Maturing May 1, 2030 | Net investment hedge              
Derivative [Line Items]              
Notional amount     $ 500,000        
Treasury Lock              
Derivative [Line Items]              
Notional amount           $ 900,000  
Number of banks | bank           11