BOEING 737 MAX AIRCRAFT GROUNDING AND RETURN TO SERVICE (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) aircraft	Mar. 13, 2019 aircraft
Unusual or Infrequent Item, or Both [Line Items]
Number of aircraft grounded				34
Aircrafts not delivered			41
Supplier proceeds \| $	$ 0	$ 428	$ 400
B-737-Max
Unusual or Infrequent Item, or Both [Line Items]
Owned MAX's in fleet			31
Contract to Own Aircraft
Unusual or Infrequent Item, or Both [Line Items]
Aircrafts not delivered			28
Contract to Lease Aircraft
Unusual or Infrequent Item, or Both [Line Items]
Aircrafts not delivered			13