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Assets and liabilities held for sale (Tables) | 12 Months Ended
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Dec. 31, 2018
Noncurrent Assets Or Disposal Groups Classified As Held For Sale Or As Held For Distribution To Owners [Abstract] |
Summary of major classes of assets and liabilities classified as held for sale | The major classes of assets and liabilities of those entities classified as held for sale at 31 December 2018 are:
| 2018 | 2017
| US$m | US$m
Assets |  |  |
Intangible assets |  | 4 | 6
Property, plant and equipment |  | 238 | 190
Investments in equity accounted units |  | 5 | -
Inventories |  | 186 | 88
Deferred tax assets |  | 66 | 49
Trade and other receivables |  | 58 | 139
Other financial assets (including loans to equity accounted units) |  | 60 | 22
Cash and cash equivalents |  | 117 | -
Assets of disposal groups held for sale |  | 734 | 494
Liabilities |  |  |
Trade and other payables |  | (134) | (60)
Provisions including post-retirement benefits |  | (160) | (64)
Liabilities of disposal groups held for sale |  | (294) | (124)
Net assets associated with disposal groups |  | 440 | 370

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