LEASES - Undiscounted Cash Flows (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
2024	$ 1,021
2025	990
2026	899
2027	860
2028	772
Thereafter	4,705
Total minimum lease payments	9,247
Less: amount of lease payments representing interest	(2,020)
Present value of future minimum lease payments	7,227
Less: current obligations under leases	(759)	$ (714)
Long-term lease obligations	6,468	6,866
Finance Leases
2024	395
2025	257
2026	192
2027	391
2028	164
Thereafter	157
Total minimum lease payments	1,556
Less: amount of lease payments representing interest	(112)
Present value of future minimum lease payments	1,444
Less: current obligations under leases	(358)	(304)
Long-term lease obligations	$ 1,086	$ 1,345