LEASES - Schedule of Outstanding Operating and Finance Obligations (Details) $ in Millions	Sep. 30, 2019 USD ($)
Operating Leases
2019 (remainder)	$ 13
2020	49
2021	41
2022	31
2023	28
2024 and thereafter	173
Total undiscounted obligations	335
Less imputed interest	(84)
Present value of lease obligations	251
Finance Leases
2019 (remainder)	2
2020	8
2021	8
2022	7
2023	7
2024 and thereafter	21
Total undiscounted obligations	53
Less imputed interest	(14)
Present value of lease obligations	39
Total
2019 (remainder)	15
2020	57
2021	49
2022	38
2023	35
2024 and thereafter	194
Total undiscounted obligations	388
Less imputed interest	(98)
Present value of lease obligations	$ 290