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Impairment charges and reversals (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Impairment Loss Recognised Or Reversed [Abstract] |
Summary of impairment charges and reversals |
Strategic report |  | Governance report |  | Financial statements |  | Production, reserves and operations |  | Additional information
|  |  |  |  |  |  |  | Non- |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  | controlling |  | Net |  | Pre-tax |  | Pre-tax |
|  | Pre-tax |  | Taxation |  | interests |  | amount |  | amount |  | amount |
|  |  | 2017 |  |  | 2017 |  |  | 2017 |  |  | 2017 |  |  | 2016 |  |  | 2015 |
| Note | US$m |  | US$m |  | US$m |  | US$m |  | US$m |  | US$m |
Energy & Minerals – Roughrider |  |  | (357 | ) |  | 100 |  |  | - |  |  | (257 | ) |  | - |  |  | (229 | )
Energy & Minerals – Rössing |  |  | (267 | ) |  | 7 |  |  | 83 |  |  | (177 | ) |  | - |  |  | - |
Energy & Minerals – Simandou |  |  | - |  |  | - |  |  | 91 |  |  | 91 |  |  | - |  |  | (2,039 | )
Energy & Minerals – Energy Resources of Australia |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (260 | )
Copper & Diamonds – Argyle |  |  | (172 | ) |  | 34 |  |  | - |  |  | (138 | ) |  | (241 | ) |  | - |
Copper & Diamonds – Molybdenum Autoclave Process |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (17 | )
Aluminium – Other |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (179 | )
Other |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (8 | ) |  | (67 | )
Total impairment charge net of reversals |  |  | (796 | ) |  | 141 |  |  | 174 |  |  | (481 | ) |  | (249 | ) |  | (2,791 | )
Allocated as: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 12 |  | - |  |  |  |  |  |  |  |  |  |  |  | - |  |  | (116 | )
Intangible assets | 13 |  | (357 | ) |  |  |  |  |  |  |  |  |  |  | (1 | ) |  | (1,833 | )
Property, plant and equipment | 14 |  | (435 | ) |  |  |  |  |  |  |  |  |  |  | (248 | ) |  | (652 | )
Other assets and liabilities |  |  | (4 | ) |  |  |  |  |  |  |  |  |  |  | - |  |  | (190 | )
Total impairment charge net of reversals |  |  | (796 | ) |  |  |  |  |  |  |  |  |  |  | (249 | ) |  | (2,791 | )
Comprising: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total impairment charge net of reversals in the financial information by business unit (page 206) |  |  |  |  |  |  |  |  |  |  |  | (796 | ) |  | (249 | ) |  | (2,791 | )
Taxation (including related to EAUs) |  |  |  |  |  |  |  |  |  |  |  | 141 |  |  | 66 |  |  | (57 | )
Non-controlling interests |  |  |  |  |  |  |  |  |  |  |  | 174 |  |  | - |  |  | 1,046 |
Total impairment in the income statement |  |  |  |  |  |  |  |  |  |  |  | (481 | ) |  | (183 | ) |  | (1,802 | )
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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 2016-01-13 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2016-03-30&anchor=para_130_d_ii&doctype=Standard -URIDate 2016-03-31 + Details
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