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RESTRUCTURING ACTIVITIES (Pre-Tax Restructuring and Integration Charges) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Restructuring and Related Activities [Abstract]        
Employee separation costs $ 0 $ 4 $ (3) $ 15
Facility-related costs 0 3 0 4
Total restructuring charges $ 0 $ 7 $ (3) $ 19