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SHARE-BASED COMPENSATION AWARDS (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Payment Arrangement, Expense $ 11 $ 13 $ 31 $ 46
Share-based Payment Arrangement, Expense, after Tax $ 8 $ 9 $ 23 $ 34