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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share [Abstract]                
Net income attributable to ordinary equity holders $ 26.2 $ 30.1 $ 42.3 $ 31.8 $ 29.7 $ 32.5 $ 98.6 $ 94.0
Weighted average number of Common stock (in thousands) (in shares) 58,572     60,936     59,284 60,899
Basic EPS (in USD per share) $ 0.45     $ 0.52     $ 1.66 $ 1.54
Dilutive effect of share based payments (in thousands) (in shares) 680     279     650 415
Weighted average number of diluted Common stock (in thousands) (in shares) 59,252     61,215     59,934 61,314
Diluted EPS (in USD per share) $ 0.44     $ 0.52     $ 1.65 $ 1.53