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Finance Expense
 12 Months Ended
Dec. 31, 2021
Disclosure of finance expense [abstract]  
Finance expense FINANCE EXPENSE
United States Dollar
Figures in millions unless otherwise stated202120202019
Interest expense – environmental rehabilitation(8.6)(10.7)(11.7)
Unwinding of discount rate on silicosis settlement costs(1.1)(1.5)(1.3)
Interest expense – lease liability(24.1)(22.4)(18.6)
Interest expense – borrowings(79.6)(105.3)(114.0)
Borrowing costs capitalised1
12.5 13.2 43.4 
Total finance expense(100.9)(126.7)(102.2)
1Borrowing costs capitalised of US$12.5 million (2020: US$13.2 million and 2019: US$43.4 million) comprise borrowing costs relating to general borrowings of US$12.5 million (2020: US$13.2 million and 2019: US$31.0 million) and specific borrowings of US$nil (2020: US$nil and 2019: US$12.4 million). The specific borrowings of US$12.4 million in 2019 related to the Gruyere project and were included in additions to property, plant and equipment of US$612.5 million (refer note 14).