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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Disclosure of fair value measurement of assets [abstract] |  |
Assets | $ 46,842 | $ 46,890
Recurring fair value measurement |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets (liabilities) | 6,149 |
Recurring fair value measurement | Cash and equivalents |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 5,780 |
Recurring fair value measurement | Other investments |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 74 |
Recurring fair value measurement | Derivatives |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 59 |
Recurring fair value measurement | Receivables from provisional copper and gold sales |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 236 |
Level 1 of fair value hierarchy [member] | Recurring fair value measurement |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets (liabilities) | 5,854 |
Level 1 of fair value hierarchy [member] | Recurring fair value measurement | Cash and equivalents |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 5,780 |
Level 1 of fair value hierarchy [member] | Recurring fair value measurement | Other investments |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 74 |
Level 1 of fair value hierarchy [member] | Recurring fair value measurement | Derivatives |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Level 1 of fair value hierarchy [member] | Recurring fair value measurement | Receivables from provisional copper and gold sales |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant other observable inputs (Level 2) | Recurring fair value measurement |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets (liabilities) | 295 |
Significant other observable inputs (Level 2) | Recurring fair value measurement | Cash and equivalents |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant other observable inputs (Level 2) | Recurring fair value measurement | Other investments |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant other observable inputs (Level 2) | Recurring fair value measurement | Derivatives |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 59 |
Significant other observable inputs (Level 2) | Recurring fair value measurement | Receivables from provisional copper and gold sales |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 236 |
Significant Unobservable Inputs (Level 3) | Recurring fair value measurement |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets (liabilities) | 0 |
Significant Unobservable Inputs (Level 3) | Recurring fair value measurement | Cash and equivalents |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant Unobservable Inputs (Level 3) | Recurring fair value measurement | Other investments |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant Unobservable Inputs (Level 3) | Recurring fair value measurement | Derivatives |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | 0 |
Significant Unobservable Inputs (Level 3) | Recurring fair value measurement | Receivables from provisional copper and gold sales |  |
Disclosure of fair value measurement of assets [abstract] |  |
Assets | $ 0 |

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