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RESTRUCTURING ACTIVITIES (Pre-Tax Restructuring and Integration Charges) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Restructuring and Related Activities [Abstract]        
Employee separation costs $ 6 $ 0 $ 13 $ (3)