LEASES - Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
Operating Leases
2020	$ 173
2021	171
2022	165
2023	115
2024	107
Thereafter	579
Total minimum lease payments	1,310
Less: Amount representing interest	(298)
Present value of minimum lease payments	1,012	$ 1,053
Current	130
Noncurrent	882
Finance Leases
2020	13
2021	13
2022	13
2023	13
2024	14
Thereafter	151
Total minimum lease payments	217
Less: Amount representing interest	(60)
Present value of minimum lease payments	157
Current	6
Noncurrent	$ 151