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, 2019	Dec. 31, 2018
Other Liabilities, Current [Abstract]
Customer Advances and Deposits, Current	$ 13	$ 25
Accrued Liabilities and Other Liabilities	21	24
Accrued Capital Expenditures	11	13
Taxes Payable, Current	16	0
Other Accrued Liabilities	9	7
Other current liabilities	$ 70	$ 69