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ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts receivable |  |
Amounts due from concentrate sales | $ 68 | $ 76
Other receivables | 295 | 172
Accounts receivable | 363 | 248
Other current assets |  |
Derivative assets | 1 | 2
Goods and services taxes recoverable | 302 | 182
Prepaid expenses | 174 | 72
Other2 | 88 | 51
Other current assets | 565 | 307
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
Deferred tax assets | 235 | 259
MALI |  |
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
VAT and fuel tax recoverables | 141 | 0
Tanzania |  |
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
VAT and fuel tax recoverables | 61 | 67
Zambia |  |
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
VAT and fuel tax recoverables | 50 | 60
Zambia |  |
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
VAT and fuel tax recoverables | 26 | 22
Dominican Republic |  |
Disclosure of Trade Receivable and Other Current Assets [Line Items] |  |
VAT and fuel tax recoverables | $ 10 | $ 12

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