LEASES - Maturities of Lease Liabilities (Details) $ in Millions	Dec. 31, 2024 USD ($)
Aircraft
Operating Leases
2025	$ 258
2026	248
2027	219
2028	199
2029	183
Thereafter	449
Total Lease Payments	1,556
Less: Imputed interest	(301)
Total	1,255
Finance Leases
2025	11
2026	11
2027	11
2028	11
2029	11
Thereafter	6
Total Lease Payments	61
Less: Imputed interest	(9)
Total	52
Other
Operating Leases
2025	28
2026	26
2027	20
2028	18
2029	15
Thereafter	215
Total Lease Payments	322
Less: Imputed interest	(154)
Total	168
Finance Leases
2025	0
2026	0
2027	0
2028	0
2029	0
Thereafter	7
Total Lease Payments	7
Less: Imputed interest	(4)
Total	$ 3