LEASES - Supplemental Balance Sheet Information (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Leases
Lease assets, non-current	$ 223
Lease liabilities, current	38
Lease liabilities, non-current	217
Total lease liabilities	$ 255
Weighted average remaining lease term	9 years 6 months 18 days
Weighted average discount rate	5.70%
Finance Leases
Lease assets, non-current	$ 14
Lease liabilities, current	5
Lease liabilities, non-current	33
Total lease liabilities	$ 38
Weighted average remaining lease term	7 years 2 months 4 days
Weighted average discount rate	8.80%