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Impairment charges (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Impairment Loss Recognised Or Reversed [Abstract] |
Summary of impairment charges |
|  |  |  |  |  |  |  | Non- |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  | controlling |  | Net |  | Pre-tax |  | Pre-tax |
|  | Pre-tax |  | Taxation |  | interests |  | amount |  | amount |  | amount |
|  |  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2017 |  |  | 2016 |
| Note | US$m |  | US$m |  | US$m |  | US$m |  | US$m |  | US$m |
Aluminium – ISAL Smelter |  |  | (123 | ) |  | 25 |  |  | - |  |  | (98 | ) |  | - |  |  | - |
Energy & Minerals – Rössing |  |  | (9 | ) |  | - |  |  | 3 |  |  | (6 | ) |  | (267 | ) |  | - |
Energy & Minerals – Roughrider |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (357 | ) |  | - |
Copper & Diamonds – Argyle |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (172 | ) |  | (241 | )
Other |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (8 | )
Total impairment charge |  |  | (132 | ) |  | 25 |  |  | 3 |  |  | (104 | ) |  | (796 | ) |  | (249 | )
Allocated as: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 12 |  | - |  |  |  |  |  |  |  |  |  |  |  | - |  |  | - |
Intangible assets | 13 |  | (2 | ) |  |  |  |  |  |  |  |  |  |  | (357 | ) |  | (1 | )
Property, plant and equipment | 14 |  | (130 | ) |  |  |  |  |  |  |  |  |  |  | (435 | ) |  | (248 | )
Other assets and liabilities |  |  | - |  |  |  |  |  |  |  |  |  |  |  | (4 | ) |  | - |
Total impairment charge |  |  | (132 | ) |  |  |  |  |  |  |  |  |  |  | (796 | ) |  | (249 | )
Comprising: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total impairment charge net of reversals in the financial information by business unit (page 249) |  |  |  |  |  |  |  |  |  |  |  | (132 | ) |  | (796 | ) |  | (249 | )
Taxation (including related to EAUs) |  |  |  |  |  |  |  |  |  |  |  | 25 |  |  | 141 |  |  | 66 |
Non-controlling interests |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  | 174 |  |  | - |
Total impairment in the income statement |  |  |  |  |  |  |  |  |  |  |  | (104 | ) |  | (481 | ) |  | (183 | )

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- Definition The disclosure of an impairment loss recognised or reversed. [Refer: Impairment loss; Reversal of impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_d_ii&doctype=Standard -URIDate 2017-03-09 + Details
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