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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Tables) | 6 Months Ended
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Jun. 30, 2021
Fair Value Measurements [Abstract] |
Disclosure of fair value measurement of liabilities [text block] | a) Assets and Liabilities Measured at Fair Value on a Recurring Basis
As at June 30, 2021 | Quoted prices in active markets for identical assets | Significant other observable inputs | Significant unobservable inputs | Aggregate fair value |  |
(Level 1) | (Level 2) | (Level 3) |  |  |
Cash and equivalents | $5,138 |  | $— |  | $— |  | $5,138 |  |  |
Other investments 1 | 377 |  | — |  | — |  | 377 |  |  |
Derivatives | — |  | 50 |  | — |  | 50 |  |  |
Receivables from provisional copper and gold sales | — |  | 282 |  | — |  | 282 |  |  |
| $5,515 |  | $332 |  | $— |  | $5,847 |  |  |
1 Includes equity investments in other mining companies. b) Fair Values of Financial Assets and Liabilities
| As at June 30, 2021 | As at December 31, 2020
| Carrying amount | Estimated fair value | Carrying amount | Estimated fair value
Financial assets |  |  |  |
Other assets 1 | $419 |  | $419 |  | $571 |  | $571 |
Other investments 2 | 377 |  | 377 |  | 428 |  | 428 |
Derivative assets 3 | 50 |  | 50 |  | 40 |  | 40 |
| $846 |  | $846 |  | $1,039 |  | $1,039 |
Financial liabilities |  |  |  |
Debt 4 | $5,152 |  | $7,039 |  | $5,155 |  | $7,288 |
Other liabilities | 422 |  | 422 |  | 382 |  | 382 |
| $5,574 |  | $7,461 |  | $5,537 |  | $7,670 |
1 Includes restricted cash and amounts due from our partners. 2 Includes equity investments in other mining companies. Recorded at fair value. Quoted market prices are used to determine fair value. 3 Primarily consists of contingent consideration received as part of the sale of Massawa and Lagunas Norte. 4 Debt is generally recorded at amortized cost. The fair value of debt is primarily determined using quoted market prices. Balance includes both current and long-term portions of debt.

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- Definition Fair Value Measurements [Abstract] + References No definition available. + Details
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- Definition The disclosure of the fair value measurement of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2020-01-01 -Paragraph 93 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2020-en-r&anchor=para_93&doctype=Standard -URIDate 2020-01-01 + Details
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