RESTRUCTURING ACTIVITIES (Pre-Tax Restructuring charges) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 30	$ 11
Invigorate Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation costs	29	9	$ 38
Facility-related costs	1	2	1
Asset impairment charges	3	0	0
Total restructuring charges	$ 33	$ 11	$ 39