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STOCK-BASED COMPENSATION - Narrative (Details) shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Intrinsic value of options exercised | $ 2.0 | $ 1.0 |
Unrecognized compensation cost | 0.0 | 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 | 0.0 | 0.0 |
RSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | $ 45.0 | $ 39.0 |
Number of units outstanding (shares) | shares | 2,623 | 3,110 | 3,751
Weighted average remaining contractual life | 9 months 29 days | 8 months 26 days |
Vesting period | 3 years |  |
Fair value of shares outstanding | $ 38.6 | $ 41.5 | $ 36.0
DSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units outstanding (shares) | shares | 561 | 476 | 764
Fair value of shares outstanding | $ 12.8 | $ 8.8 | $ 11.2
PGSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units outstanding (shares) | shares | 3,962 | 3,867 |
Fair value of shares outstanding | $ 52.0 | $ 33.0 |
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 | 8.0 | 3.0 |
Long term incentive plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense (recovery) from share-based payment transactions with employees | 8.0 | 9.0 |
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 | $ 0.0 |
Vesting period | 4 years |  |
Exercise period | 7 years |  |
Number of shares available for grant (shares) | shares | 100 | 300 |

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