RESTRUCTURING ACTIVITIES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 4	$ 5	$ 23	$ 11
Accounts Payable and Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	18		18		$ 22
Cost of Revenue [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	2	4	9	8
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 2	$ 1	$ 14	$ 3