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Change in Working Capital
12 Months Ended
Dec. 31, 2021
Disclosure Change In Working Capital [abstract]  
Change in working capital CHANGE IN WORKING CAPITAL
United States Dollar
Figures in millions unless otherwise stated202120202019
Inventories(132.1)(89.9)(56.2)
Trade and other receivables47.7 (88.0)(5.6)
Trade and other payables(5.0)6.1 37.2 
Total change in working capital(89.4)(171.8)(24.6)