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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
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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

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