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ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Accounts receivable    
Amounts due from concentrate sales $ 265 $ 68
Other receivables 293 295
Accounts receivable 558 363
Other current assets    
Value added taxes recoverable1 208 302
Prepaid expenses 227 174
Other2 84 89
Other current assets 519 565
Mali    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 59 141
TANZANIA, UNITED REPUBLIC OF    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 35 61
Zambia    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 52 50
Settlements, tax matters 50  
ARGENTINA    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables 37 26
Dominican Republic    
Disclosure of Trade Receivable and Other Current Assets [Line Items]    
VAT and fuel tax recoverables $ 11 $ 10