Finance income and finance costs (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Finance Income Expense Explanatory [Abstract]

Summary of Finance Income and Finance Cost

			2017			2016			2015
	Note	US$m			US$m			US$m
Finance income from equity accounted units (Rio Tinto share)			4			6			8
Other finance income (including bank deposits and other financial assets)			137			83			44
Total finance income			141			89			52

Interest on:
– Financial liabilities at amortised cost and associated derivatives			(819	)		(895	)		(972	)
– Finance leases			(3	)		(3	)		(4	)
Fair value movements:
– Bonds designated as hedged items in fair value hedges			28			89			(17	)
– Derivatives designated as hedging instruments in fair value hedges			(22	)		(89	)		(11	)
Loss on early redemption of bonds ^(a)			(256	)		(324	)		-
Amounts capitalised	14		224			111			254
Total finance costs			(848	)		(1,111	)		(750	)

(a)	In 2017, loss on early redemption of bonds includes 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 on 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).