RELATED PARTIES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Contributions to equity method investee	$ 10
Equity Method Investee [Member]
Related Party Transaction [Line Items]
Revenues	9	$ 11	$ 18	$ 20
Receivables	3		3		$ 3
Accounts payable, related parties					1
Equity Method Investee [Member] | Prepaid Expenses and Other Current Assets [Member]
Related Party Transaction [Line Items]
Other receivables	3		3		$ 7
Equity Method Investee [Member] | Selling, General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
Income from related party recognized	$ 4	$ 5	$ 8	$ 9