COMMITMENTS AND CONTINGENT LIABILITIES COMMITMENTS AND CONTINGENT LIABILITIES (Minimum Lease Commitments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Operating Leases, Rent Expense, Net	$ 32	$ 28	$ 29
Operating Leases, Future Minimum Payments Due 2018	5
Operating Leases, Future Minimum Payments Due 2019	4
Operating Leases, Future Minimum Payments Due 2020	3
Operating Leases, Future Minimum Payments Due 2021	2
Operating Leases, Future Minimum Payments Due 2022	1
Operating Leases, Future Minimum Payments Due 2023 and Thereafter	6
Operating Leases, Future Minimum Payments Due	$ 21