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SIGNIFICANT ACCOUNTING POLICIES - Joint Arrangements and Entities Other Than 100% Owned Barrick Subsidiaries (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2017 | Jun. 09, 2017 | Mar. 28, 2017 | Dec. 31, 2018
Joint ventures |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Contractual obligation |  |  |  | $ 307
GNX |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint venture |  |  |  | 50.00%
Jabal Sayid |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint venture |  |  |  | 50.00%
Kabanga |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint venture |  |  |  | 50.00%
Zaldívar |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint venture |  |  |  | 50.00%
Norte Abierto Project |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 50.00%
Donlin Gold Project |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 50.00%
Kalgoorlie |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 50.00%
Porgera Mine |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 47.50%
Turquoise Ridge Mine |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 75.00%
Veladero |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Economic interest in joint operation |  |  |  | 50.00%
Proportion of ownership interest sold | 50.00% |  |  |
Cerro Casale |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 50.00% |  |
Economic interest in joint operation |  | 50.00% |  | 50.00%
Proportion of ownership interest sold |  | 25.00% | 25.00% | 25.00%
Acacia Mining PLC |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  | 63.90%
Proportion of ownership interests held by non-controlling interests |  |  |  | 36.10%
Pueblo Viejo |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  | 60.00%
Proportion of ownership interests held by non-controlling interests |  |  |  | 40.00%
South Arturo |  |  |  |
Disclosure of Joint Arrangements and Subsidiaries [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  | 60.00%
Proportion of ownership interests held by non-controlling interests |  |  |  | 40.00%

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