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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of comprehensive income [abstract]      
Profit (loss) for the year $ 481.5 $ 2,153.8 $ (2,687.9)
Items of other comprehensive income that were or will be reclassified to profit or loss      
Foreign currency translation differences for foreign operations 2.2 (2.4) (9.1)
Net change in fair value of investments in debt instruments at fair value through other comprehensive income, net of tax 11.9 7.6 4.4
Net change in fair value of investments in debt instruments at fair value through other comprehensive income that was transferred to profit or loss (1.0) 0.7 13.6
Items of other comprehensive income that would never be reclassified to profit or loss      
Net change in fair value of investments in equity instruments at fair value through other comprehensive income, net of tax 1.6 (0.1) 1.5
Defined benefit pension plans actuarial gains (losses), net of tax 1.6 (1.7) 0.1
Other comprehensive income for the year, net of tax 16.3 4.1 10.5
Total comprehensive income for the year 497.8 2,157.9 (2,677.4)
Attributable to:      
Owners of the Company 495.1 2,151.3 (2,683.3)
Non-controlling interests 2.7 6.6 5.9
Total comprehensive income for the year $ 497.8 $ 2,157.9 $ (2,677.4)