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STOCK-BASED COMPENSATION - Narrative (Details) shares in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 USD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Intrinsic value of options exercised | $ 0 | $ 0 |
Unrecognized compensation cost | 0 | 0 |
Global Employee Share Plan (GESP) |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | 12,000,000 |  |
RSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | $ 29,000,000 | $ 42,000,000 |
Vesting period | 3 years |  |
Weighted average remaining contractual life | 340 days | 1 year 69 days |
Number of units outstanding (shares) | shares | 3,751,000 | 4,537,000 | 6,452,000
Fair value of shares outstanding | $ 36,000,000 | $ 37,700,000 | $ 58,600,000
RSUs | Acacia Mining PLC |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Fair value of shares outstanding | $ 2,000,000 | $ 2,000,000 |
RSUs | Minimum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 2 years 6 months |  |
RSUs | Maximum |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 3 years |  |
DSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Maximum election amount of required annual retainer | 100.00% |  |
Number of units outstanding (shares) | shares | 764,000 | 725,000 | 573,000
Fair value of shares outstanding | $ 11,200,000 | $ 11,600,000 | $ 9,200,000
DSUs | Acacia Mining PLC |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Fair value of shares outstanding | $ 0 | $ 0 |
PGSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units outstanding (shares) | shares | 3,024 | 2,174 |
Fair value of shares outstanding | $ 18,000,000 | $ 14,000,000 |
ESPP |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | 100,000 | 400,000 |
Barrick Share Purchase Plan (BSPP) [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | 2,000,000 |  |
Stock options |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | $ 0 | $ 0 |
Vesting period | 4 years |  |
Exercise period | 7 years |  |
Number of shares available for grant (shares) | shares | 800 | 1,000 |

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