LEASES Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Amortization of assets, included in Depreciation and amortization expense	$ 2	$ 1	$ 6	$ 5
Interest on lease liabilities, included in Interest expense	1	1	3	3
Amortization of assets, included in Total operating expense	1	2	5	6
Interest on lease liabilities, included in Total operating expense	1	1	2	2
Total net lease cost	$ 5	$ 5	$ 16	$ 16