LEASES - Future Lease Payments (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Leases
2020	$ 8
2021	4
2022	2
2023	1
2024	0
Thereafter	0
Total lease payments	15
Imputed interest	(1)
Present value of lease liabilities	14
Finance Lease
2020	2
2021	2
2022	2
2023	1
2024	1
Thereafter	0
Total lease payments	8
Imputed interest	(1)
Present value of lease liabilities	7
2020	10
2021	6
2022	4
2023	2
2024	1
Thereafter	0
Total lease payments	23
Imputed interest	(2)
Total lease liabilities	$ 21