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Related Party Disclosures (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Related Party Disclosures        
Short-term benefits $ 0.9 $ 0.9 $ 1.8 $ 1.9
Share-based payments 1.3 0.1 3.9 3.5
Total $ 2.2 $ 1.0 $ 5.7 $ 5.4