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Impairment charges (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Impairment Loss Recognised Or Reversed [Abstract]

Summary of impairment charges

								Non-
								controlling			Net			Pre-tax			Pre-tax
		Pre-tax			Taxation			interests			amount			amount			amount
			2018			2018			2018			2018			2017			2016
	Note	US$m			US$m			US$m			US$m			US$m			US$m
Aluminium – ISAL Smelter			(123	)		25			-			(98	)		-			-
Energy & Minerals – Rössing			(9	)		-			3			(6	)		(267	)		-
Energy & Minerals – Roughrider			-			-			-			-			(357	)		-
Copper & Diamonds – Argyle			-			-			-			-			(172	)		(241	)
Other			-			-			-			-			-			(8	)
Total impairment charge			(132	)		25			3			(104	)		(796	)		(249	)

Allocated as:
Goodwill	12		-												-			-
Intangible assets	13		(2	)											(357	)		(1	)
Property, plant and equipment	14		(130	)											(435	)		(248	)
Other assets and liabilities			-												(4	)		-
Total impairment charge			(132	)											(796	)		(249	)
Comprising:
Total impairment charge net of reversals in the financial information by business unit (page 249)												(132	)		(796	)		(249	)
Taxation (including related to EAUs)												25			141			66
Non-controlling interests												3			174			-
Total impairment in the income statement												(104	)		(481	)		(183	)