LEASES - Maturities of Operating and Financing Lease Liabilities (Details) $ in Millions	Sep. 30, 2019 USD ($)
Operating Leases
2019, remaining	$ 8
2020	29
2021	22
2022	18
2023	16
Thereafter	101
Total lease payments	194
Less: Imputed interest	(73)
Present value of lease liabilities	121
Finance Leases
2019, remaining	1
2020	11
2021	2
2022	0
2023	0
Thereafter	0
Total lease payments	14
Less: Imputed interest	0
Present value of lease liabilities	14
Total
2019, remaining	9
2020	40
2021	24
2022	18
2023	16
Thereafter	101
Total lease payments	208
Less: Imputed interest	(73)
Present value of lease liabilities	135
New York City and San Fransisco
Finance Leases
Total lease payments	$ 7