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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fair Value Disclosures [Abstract]    
Long-term debt and current portion of long term debt, carrying value $ 8,566 $ 8,057
Long-term debt and current portion of long-term debt, fair value $ 9,232 $ 9,075