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ACQUISITION AND DIVESTITURES - Business Combination of Randgold (Details) - USD ($) | 12 Months Ended |
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Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Disclosure of detailed information about business combination [line items] |  |  |
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination | $ 0 | $ 18,000,000 |
Barrick Gold Corporation [Member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Proportion of interest held by shareholders |  |  | 66.70%
Randgold Resources Limited [Member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Proportion of interest held by shareholders |  |  | 33.30%
Randgold |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Percentage of voting equity interests acquired |  |  | 100.00%
Share for share exchange |  |  | 6.1280
Number of instruments or interests issued or issuable |  |  | 583,669,178
Consideration transferred, acquisition-date fair value |  |  | $ 7,909,000,000
Fair value of acquired receivables |  |  | 193,000,000
Tax claims related to foreign operations | $ 275,000,000 |  | 267,700,000
Taxes recoverable |  |  | 41,100,000
Tax settlements paid |  | 60,000,000 |
Fair value of taxes recoverable |  |  | 0
Revenue of acquiree since acquisition date |  | 1,390,000,000 |
Profit (loss) of acquiree since acquisition date |  | 241,000,000 |
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  | $ 37,000,000 |
Randgold | Equity shares [Member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Consideration transferred, acquisition-date fair value |  |  | $ 7,903,000,000

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