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Impairment charges - (Tables)
 6 Months Ended
Jun. 30, 2019
Disclosure of impairment of assets [Abstract]  
Impairment
Impairment charges



Non-controlling

Net

Net

Pre-tax

Taxation

interest

amount

amount

HY 2019

HY 2019

HY 2019

HY 2019

HY 2018

US$m

US$m

US$m

US$m

US$m

Aluminium - ISAL Smelter
(109
)
23

— 

(86
)
(98
)
Copper & Diamonds - Oyu Tolgoi
(2,240
)
(39
)
1,506

(773
)
— 

Total impairment charge
(2,349
)
(16
)
1,506

(859
)
(98
)