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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
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