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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Carrying amount    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets $ 849 $ 1,039
Financial liabilities 5,623 5,537
Carrying amount | Debt    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities 5,150 5,155
Carrying amount | Other liabilities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities 473 382
Carrying amount | Other assets    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 382 571
Carrying amount | Other investments    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 414 428
Carrying amount | Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 53 40
Estimated fair value    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 849 1,039
Financial liabilities 7,401 7,670
Estimated fair value | Debt    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities 6,928 7,288
Estimated fair value | Other liabilities    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial liabilities 473 382
Estimated fair value | Other assets    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 382 571
Estimated fair value | Other investments    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets 414 428
Estimated fair value | Derivatives    
Disclosure of fair value measurement of assets and liabilities [Line Items]    
Financial assets $ 53 $ 40