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Change in Working Capital (Tables)
12 Months Ended
Dec. 31, 2022
Disclosure Change In Working Capital [abstract]  
Summary of change in working capital
United States Dollar
Figures in millions unless otherwise stated202220212020
Inventories(195.1)(132.1)(89.9)
Trade and other receivables38.5 47.7 (88.0)
Trade and other payables22.4 (5.0)6.1 
Total change in working capital(134.2)(89.4)(171.8)