FREQUENT FLYER PROGRAMS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Frequent Flyer Program [Line Items]
Other accrued liabilities	$ 909		$ 878
Deferred revenue	641		640
Other liabilities	438		417
Passenger revenues	1,484	$ 1,133
Other—net revenues	241	190
Frequent Flyer Program Revenue [Member]
Frequent Flyer Program [Line Items]
Passenger revenues	86	69
Other—net revenues	119	103
Frequent Flyer Program Revenue	205	$ 172
Frequent Flyer Program Liabilities [Member]
Frequent Flyer Program [Line Items]
Other accrued liabilities	498		484
Deferred revenue	641		638
Other liabilities	22		21
Total	$ 1,161		$ 1,143