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Other investments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Non Current Investments [Abstract]    
Financial instruments and other financial assets at fair value through other comprehensive income [1] $ 1,358.4 $ 162.9
Financial assets at fair value through profit or loss [1] 11.2 2.3
Other 3.6 4.0
Total 1,373.2 169.2
Current investments    
Bank deposits and other financial assets at amortized cost 2,017.4 2,123.1
Financial assets at fair value through profit or loss [1] 0.7 1.1
Financial instruments at fair value through other comprehensive income [1] 215.0 20.3
Total current investments $ 2,233.1 $ 2,144.5
Bank deposits at amortized costs    
Current investments    
Average interest rate (as a percent) 5.10% 0.60%
Debt securities at fair value through other comprehensive income    
Current investments    
Average interest rate (as a percent) 3.30%  
Weighted average of debt securities 2 years  
[1] See also Note 29(b) in respect of the Group’s exposure to credit, currency, interest rate and fair value risks related to investments.