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Finance income and finance costs | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Finance Income And Finance Costs [Abstract] |
Finance income and finance costs | 8 Finance income and finance costs
|  |  | 2018 |  |  | 2017 |  |  | 2016 |
| Note | US$m |  | US$m |  | US$m |
Finance income from equity accounted units (Rio Tinto share) |  |  | 7 |  |  | 4 |  |  | 6 |
Other finance income (including bank deposits and other financial assets) |  |  | 242 |  |  | 137 |  |  | 83 |
Total finance income |  |  | 249 |  |  | 141 |  |  | 89 |
Interest on: |  |  |  |  |  |  |  |  |  |
– Financial liabilities at amortised cost and associated derivatives |  |  | (775 | ) |  | (819 | ) |  | (895 | )
– Finance leases |  |  | (2 | ) |  | (3 | ) |  | (3 | )
Fair value movements: |  |  |  |  |  |  |  |  |  |
– Bonds designated as hedged items in fair value hedges |  |  | 96 |  |  | 28 |  |  | 89 |
– Derivatives designated as hedging instruments in fair value hedges |  |  | (73 | ) |  | (22 | ) |  | (89 | )
Loss on early redemption of bonds (a) |  |  | (94 | ) |  | (256 | ) |  | (324 | )
Amounts capitalised | 14 |  | 296 |  |  | 224 |  |  | 111 |
Total finance costs |  |  | (552 | ) |  | (848 | ) |  | (1,111 | )
(a) | In 2018, loss on early redemption of bonds includes a premium charge of US$72 million; unamortised debt issuance costs and fees of US$9 million, the write-off of the fair value hedge adjustment of US$16 million and the reclassification of a gain out of the cost of hedging reserve of US$3 million (see note 30).
In 2017, loss on early redemption of bonds included a premium charge of US$238 million; unamortised debt issuance costs and fees of US$14 million and the write-off of the fair value hedge adjustment of US$4 million (see note 30). In 2016, loss of early redemption of bonds included a premium charge of US$441 million; unamortised debt issuance costs and fees of US$42 million partially offset by the write-off of fair value hedge adjustments of US$159 million (see note 30).

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- Definition The disclosure of finance income (cost). [Refer: Finance income (cost)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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