COMMITMENTS AND CONTINGENCIES - LESSOR INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Minimum lease payments	$ 48	$ 51	$ 145	$ 150
Variable lease payments	1	0	1	6
Total revenues from operating leases	49	51	146	156
Assets Leased to Others [Member]
Lessee, Lease, Description [Line Items]
Depreciation	$ 10	$ 10	$ 29	$ 29