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v3.19.3.a.u2

Goodwill (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Goodwill [Abstract] |
Summary of goodwill |
| 2019 US$m |  | 2018 US$m |
Net book value |  |
At 1 January | 912 |  | 1,037 |
Adjustment on currency translation | 10 |  | (125 | )
At 31 December | 922 |  | 912 |
– cost | 16,926 |  | 15,861 |
– accumulated impairment | (16,004 | ) | (14,949 | )
At 1 January |  |
– cost | 15,861 |  | 17,942 |
– accumulated impairment | (14,949 | ) | (16,905 | )
At 31 December, goodwill has been allocated as follows:
| 2019 US$m |  | 2018 US$m |
Net book value |  |
Richards Bay Minerals | 487 |  | 474 |
Pilbara | 349 |  | 351 |
Dampier Salt | 86 |  | 87 |
| 922 |  | 912 |
Key assumptions calculation of fair value less costs of disposal | The key assumptions to which the calculation of FVLCD for Richards Bay Minerals is most sensitive and the corresponding decrease in FVLCD are set out below:
| US$m |
5% decrease in the titanium slag price | 230 |
1% increase in the discount rate applied to post-tax cash flows | 237 |
10% strengthening of the South African rand | 762 |

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