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Impairment charges - Summary of impairment charges (Detail) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | $ (1,134) | $ (2,349)
Taxation (including related to EAUs) |  | 101 |
Impairment charges, Non-controlling interests |  | 0 | 1,506
Impairment charge, net amount |  | (1,033) | (859)
Impairment charges of consolidated balances | [1] | (1,015) | (2,349)
Impairment charges related to EAUs (pre-tax) |  | (148) | 0
Total impairment charges in the financial information by business unit |  | (1,163) | (2,349)
Taxation (including related to EAUs) |  | 130 | (16)
Non-controlling interests |  | 0 | (1,506)
Impairment charge, net amount |  | (1,033) | (859)
Intangible assets |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (4) | (1)
Property, plant and equipment |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (1,011) | (2,348)
Investment in equity accounted units ('EAUs') |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (119) | 0
Aluminium, Alumina and Bauxite | Pacific Aluminum |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (489) | 0
Taxation (including related to EAUs) |  | 17 |
Impairment charges, Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (472) |
Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (472) |
Aluminium, Alumina and Bauxite | ISAL |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (204) | (109)
Taxation (including related to EAUs) |  | (65) |
Impairment charges, Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (269) |
Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (269) |
Copper & Diamonds | Diavik |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | (441) | 0
Taxation (including related to EAUs) |  | 149 |
Impairment charges, Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (292) |
Non-controlling interests |  | 0 |
Impairment charge, net amount |  | (292) |
Copper & Diamonds | Oyu Tolgoi |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |
Total impairment charge |  | 0 | $ (2,240)
Taxation (including related to EAUs) |  | 0 |
Impairment charges, Non-controlling interests |  | 0 |
Impairment charge, net amount |  | 0 |
Non-controlling interests |  | 0 |
Impairment charge, net amount |  | $ 0 |
[1] | Refer to Impairment charges note on pages F-12 and F-13.

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