ESTIMATES, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BALANCE SHEET DETAIL Estimates, Significant Accounting Policies and Balance Sheet Detail - Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities, Current [Abstract]
Customer Advances and Deposits, Current	$ 25	$ 10
Accrued Liabilities and Other Liabilities	24	22
Other Accrued Liabilities	20	21
Other current liabilities	$ 69	$ 53