XML 325 R122.htm IDEA: XBRL DOCUMENT v3.10.0.1
Finance income and finance costs - Summary of finance income and finance costs (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Material Income And Expense [Abstract]      
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 (94) (256) (324)
Amounts capitalised 296 224 111
Total finance costs $ (552) $ (848) $ (1,111)