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ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Accounts receivable    
Amounts due from concentrate sales $ 76 $ 110
Other receivables 172 129
Accounts receivable 248 239
Other current assets    
Derivative assets (note 25f) 2 2
Goods and services taxes recoverable 182 167
Prepaid expenses 72 68
Other 51 84
Other current assets 307 321
Tanzania    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 67 32
ZAMBIA    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 60 31
Argentina    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 22 49
Chile    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 2 3
Dominican Republic    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 12 19
Peru    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables $ 7 $ 8