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FINANCIAL RISK MANAGEMENT - CURRENCY RISK - Schedule of unrealized gains/(losses) included in accumulated other comprehensive income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]      
Cash flow hedges $ (76.5) $ 37.8 $ (9.4)
Cash flow hedges      
Disclosure of detailed information about financial instruments [line items]      
Cash flow hedges 0.0 0.0 0.6
Cash flow hedges | Foreign exchange derivatives      
Disclosure of detailed information about financial instruments [line items]      
Cash flow hedges (42.8) 20.7 (11.6)
Cash flow hedges | Cost of sales | Foreign exchange derivatives      
Disclosure of detailed information about financial instruments [line items]      
Cash flow hedges (1.5) 1.1 18.2
Cash flow hedges | Foreign currency exchange gains/(losses), net & other finance costs | Foreign exchange derivatives      
Disclosure of detailed information about financial instruments [line items]      
Cash flow hedges (8.1) 1.6 0.0
Cross-currency swaps      
Disclosure of detailed information about financial instruments [line items]      
Cross-currency swaps designated as net investment hedges $ 1.2 $ (1.0) $ 0.0