LEASES - Schedule of Leased Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 1,471	$ 1,453
Operating Lease, Expense	708	654	$ 602
Sublease Income	(15)	(16)	(14)
Lease, Cost	693	638	588
Aircraft Leases [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	701	782
Operating Lease, Cost	191	174	215
CPA Aircraft [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	683	600
Operating Lease, Cost	100	80	80
Airport Facilities [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	21	16
Operating Lease, Cost	384	379	288
Corporate real estate [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	66	55
Operating Lease, Cost	$ 33	$ 21	$ 19