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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on Recurring Basis at Aggregate Fair Value (Details) - Recurring fair value measurement - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value $ 5,989 $ 5,921
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 5,694 5,616
Significant Other Observable Inputs (Level 2)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 295 305
Significant Unobservable Inputs (Level 3)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Cash and cash equivalents [Member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 5,280 5,188
Cash and cash equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 5,280 5,188
Cash and cash equivalents [Member] | Significant Other Observable Inputs (Level 2)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Cash and cash equivalents [Member] | Significant Unobservable Inputs (Level 3)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Other investments [Member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 414 428
Other investments [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 414 428
Other investments [Member] | Significant Other Observable Inputs (Level 2)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Other investments [Member] | Significant Unobservable Inputs (Level 3)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Derivatives    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 53 40
Derivatives | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Derivatives | Significant Other Observable Inputs (Level 2)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 53 40
Derivatives | Significant Unobservable Inputs (Level 3)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Receivables from provisional copper and gold sales [Member]    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 242 265
Receivables from provisional copper and gold sales [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Receivables from provisional copper and gold sales [Member] | Significant Other Observable Inputs (Level 2)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 242 265
Receivables from provisional copper and gold sales [Member] | Significant Unobservable Inputs (Level 3)    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value $ 0 $ 0