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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
Twelve Months Ended December 31,
202320222021
($ in millions, except share and share amounts)
Net income$534.7 $51.1 $29.8 
Less: Preference share dividends(49.9)(44.6)(44.5)
Net income/(loss) available to ordinary shareholders$484.8 $6.5 $(14.7)
Basic and diluted weighted average ordinary shares outstanding60,395,839 60,395,839 60,395,839 
Basic and diluted earnings/(loss) per ordinary share$8.03 $0.11 $(0.24)