v3.25.2
Stated capital (Details) - USD ($)
shares in Thousands, $ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Disclosure of classes of share capital [line items]    
Beginning Balance, Number of shares 333,441  
Shares issued on exercise of options (in shares) 2,080  
Ending Balance, Number of shares 335,521  
Beginning balance, Equity [1] $ (314.4) [2] $ 328.7
Ending balance, Equity (98.4) (308.3) [1]
Stated capital net of issue costs    
Disclosure of classes of share capital [line items]    
Beginning balance, Equity [1] 5,403.1 5,394.8
Shares issued on exercise of options 16.6 4.4
Ending balance, Equity 5,419.7 $ 5,399.2 [1]
Share capital    
Disclosure of classes of share capital [line items]    
Beginning balance, Equity 101.0  
Shares issued on exercise of options 0.7  
Ending balance, Equity 101.7  
Share capital net of issue costs    
Disclosure of classes of share capital [line items]    
Beginning balance, Equity 100.0  
Shares issued on exercise of options 0.7  
Ending balance, Equity 100.7  
Share premium    
Disclosure of classes of share capital [line items]    
Beginning balance, Equity 5,333.0  
Shares issued on exercise of options 15.9  
Ending balance, Equity 5,348.9  
Share premium net of issue costs    
Disclosure of classes of share capital [line items]    
Beginning balance, Equity 5,303.1  
Shares issued on exercise of options 15.9  
Ending balance, Equity $ 5,319.0  
[1] Revised for a correction to Property, plant and equipment (see note 21).
[2] Revised for corrections to Property, plant and equipment and Trade and other payables (see note 21).