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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [abstract] |
Summary of Property, Plant and Equipment |
United States Dollars 31 December 2019 |  |  |  |  |  |  |  | United States Dollars 31 December 2020 |
Land, mineral rights and rehabilitation assets |  |  | Mine development, infrastructure and other assets |  |  | Right-of-use assets relating to mine development, infrastructure and other assets |  |  | Total |  |  |  |  |  |  |  | Total |  |  | Right-of-use assets relating to mine development, infrastructure and other assets |  |  | Mine development, infrastructure and other assets |  |  | Land, mineral rights and rehabilitation assets |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14. |  |  | PROPERTY, PLANT AND EQUIPMENT Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 614.0 |  |  |  | 9,662.3 |  |  |  | — |  |  |  | 10,276.3 |  |  |  |  |  |  | Balance at beginning of the year |  |  | 10,972.4 |  |  |  | 373.0 |  |  |  | 10,167.1 |  |  |  | 432.3 |
| (272.1) |  |  |  | 271.7 |  |  |  | 0.4 |  |  |  | — |  |  |  |  |  |  | Reclassifications |  |  | (0.3 | ) |  |  | (0.1 | ) |  |  | 12.6 |  |  |  | (12.8 | )
| 30.4 |  |  |  | 582.1 |  |  |  | — |  |  |  | 612.5 |  |  |  |  |  |  | Additions |  |  | 583.7 |  |  |  | — |  |  |  | 583.3 |  |  |  | 0.4 |
| — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |  |  | Salares Norte project costs capitalised |  |  | 1.3 |  |  |  | — |  |  |  | 1.3 |  |  |  | — |
| — |  |  |  | (88.6 | ) |  |  | 88.6 |  |  |  | — |  |  |  |  |  |  | Reclassification of finance lease assets to right-of-use assets on adoption of IFRS 16 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
| — |  |  |  | — |  |  |  | 209.6 |  |  |  | 209.6 |  |  |  |  |  |  | Right-of-use assets capitalised on adoption of IFRS 16 (refer note 33) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
| — |  |  |  | — |  |  |  | 67.3 |  |  |  | 67.3 |  |  |  |  |  |  | Right-of-use assets capitalised during the year (refer note 33) |  |  | 127.2 |  |  |  | 127.2 |  |  |  | — |  |  |  | — |
| — |  |  |  | — |  |  |  | 5.9 |  |  |  | 5.9 |  |  |  |  |  |  | Remeasurements of right-of-use assets capitalised (refer note 33) 1 |  |  | 12.8 |  |  |  | 12.8 |  |  |  | — |  |  |  | — |
| — |  |  |  | 31.0 |  |  |  | — |  |  |  | 31.0 |  |  |  |  |  |  | General borrowing costs capitalised 2 |  |  | 13.2 |  |  |  | — |  |  |  | 13.2 |  |  |  | — |
| (3.3) |  |  |  | (11.0 | ) |  |  | — |  |  |  | (14.3 | ) |  |  |  |  |  | Disposals |  |  | (8.7 | ) |  |  | — |  |  |  | (8.7 | ) |  |  | — |
| — |  |  |  | (10.0 | ) |  |  | — |  |  |  | (10.0 | ) |  |  |  |  |  | Disposal of subsidiary |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
| (6.2) |  |  |  | (381.6 | ) |  |  | (0.3 | ) |  |  | (388.1 | ) |  |  |  |  |  | Scrapping of assets |  |  | (101.7 | ) |  |  | (12.8 | ) |  |  | (88.1 | ) |  |  | (0.8 | )
| 66.1 |  |  |  | — |  |  |  | — |  |  |  | 66.1 |  |  |  |  |  |  | Changes in estimates of rehabilitation assets |  |  | (6.6 | ) |  |  | — |  |  |  | — |  |  |  | (6.6 | )
| 3.4 |  |  |  | 111.2 |  |  |  | 1.5 |  |  |  | 116.1 |  |  |  |  |  |  | Translation adjustment |  |  | 208.3 |  |  |  | 26.4 |  |  |  | 170.1 |  |  |  | 11.8 |
| 432.3 |  |  |  | 10,167.1 |  |  |  | 373.0 |  |  |  | 10,972.4 |  |  |  |  |  |  | Balance at end of the year |  |  | 11,801.6 |  |  |  | 526.5 |  |  |  | 10,850.8 |  |  |  | 424.3 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated depreciation and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 35.5 |  |  |  | 5,981.6 |  |  |  | — |  |  |  | 6,017.1 |  |  |  |  |  |  | Balance at beginning of the year |  |  | 6,315.3 |  |  |  | 44.0 |  |  |  | 6,227.7 |  |  |  | 43.6 |
| — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |  |  | Reclassifications |  |  | (0.3 | ) |  |  | — |  |  |  | (0.1 | ) |  |  | (0.2 | )
| 12.9 |  |  |  | 555.1 |  |  |  | 42.0 |  |  |  | 610.0 |  |  |  |  |  |  | Charge for the year |  |  | 661.3 |  |  |  | 59.2 |  |  |  | 581.9 |  |  |  | 20.2 |
| — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |  |  | Salares Norte depreciation capitalised |  |  | 0.6 |  |  |  | 0.6 |  |  |  | — |  |  |  | — |
| — |  |  |  | (1.3 | ) |  |  | 1.3 |  |  |  | — |  |  |  |  |  |  | Reclassification of finance lease assets to right-of-use assets on adoption of IFRS 16 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
| — |  |  |  | — |  |  |  | 0.2 |  |  |  | 0.2 |  |  |  |  |  |  | Impairment |  |  | 11.7 |  |  |  | — |  |  |  | 11.7 |  |  |  | — |
| — |  |  |  | 30.0 |  |  |  | — |  |  |  | 30.0 |  |  |  |  |  |  | Write-off of exploration and evaluation assets 3 |  |  | 16.9 |  |  |  | — |  |  |  | 16.9 |  |  |  | — |
| (3.1) |  |  |  | (8.7 | ) |  |  | — |  |  |  | (11.8 | ) |  |  |  |  |  | Disposals |  |  | (7.8 | ) |  |  | — |  |  |  | (7.8 | ) |  |  | — |
| — |  |  |  | (4.1 | ) |  |  | — |  |  |  | (4.1 | ) |  |  |  |  |  | Disposal of subsidiary |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
| (6.2) |  |  |  | (381.6 | ) |  |  | (0.3 | ) |  |  | (388.1 | ) |  |  |  |  |  | Scrapping of assets |  |  | (101.7 | ) |  |  | (12.8 | ) |  |  | (88.1 | ) |  |  | (0.8 | )
| 4.5 |  |  |  | 56.7 |  |  |  | 0.8 |  |  |  | 62.0 |  |  |  |  |  |  | Translation adjustment |  |  | 134.4 |  |  |  | 6.9 |  |  |  | 117.9 |  |  |  | 9.6 |
| 43.6 |  |  |  | 6,227.7 |  |  |  | 44.0 |  |  |  | 6,315.3 |  |  |  |  |  |  | Balance at end of the year |  |  | 7,030.4 |  |  |  | 97.9 |  |  |  | 6,860.1 |  |  |  | 72.4 |
| 388.7 |  |  |  | 3,939.4 |  |  |  | 329.0 |  |  |  | 4,657.1 |  |  |  |  |  |  | Carrying value at end of the year |  |  | 4,771.2 |  |  |  | 428.6 |  |  |  | 3,990.7 |  |  |  | 351.9 |
1 | The remeasurements relate mainly to leases at the Group’s Australian operations that have variable payments linked to the Austalian consumer price index (“CPI”).
2 | General borrowing costs of US$13.2 million (2019: US$31.0 million) arising on group general borrowings were capitalised during the period and comprised US$12.1 million (2019: US20.0 million) borrowings costs related to the Damang reinvestment project, US$nil (2019: US$11.0 million) borrowings costs related to the Gruyere project and US$1.1 million (2019: US$nil) related to the Salares Norte project. An average interest capitalisation rate of 4.4% (2019: 6.2%) was applied. During 2020, capitalisation of borrowing costs ceased for the Damang reinvestment project and the Gruyere project due to both projects reaching commercial levels of production. In February 2020, the Salares Norte project was approved by the Board and capital expenditure commenced in April 2020, resulting in capitalisation of borrowing costs from that date.
3 | The write-off of exploration and evaluation assets is due to specific exploration programmes not yielding results to warrant further exploration at the Group’s Australian operations and the US$16.9 million (2019: US$30.0 million) is included in the US$49.7 million (2019: US$84.4 million) “Exploration expense” in the consolidated income statement.

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