REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contracts with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

Passenger revenue recognized in the consolidated statements of operations (in millions):

	Twelve Months Ended December 31,
	2021		2020		2019
Passenger ticket revenue, including ticket breakage and net of taxes and fees	$	4,533	$	2,428	$	6,824
Passenger ancillary revenue	327		245		567
Mileage Plan passenger revenue	639		346		704
Total Passenger revenue	$	5,499	$	3,019	$	8,095

Mileage Plan revenue included in the consolidated statements of operations (in millions):

	Twelve Months Ended December 31,
	2021		2020		2019
Passenger revenue	$	639	$	346	$	704
Mileage Plan other revenue	461		374		465
Total Mileage Plan revenue	$	1,100	$	720	$	1,169

Cargo and other revenue included in the consolidated statements of operations (in millions):

	Twelve Months Ended December 31,
	2021		2020		2019
Cargo revenue	$	124	$	112	$	133
Other revenue	92		61		88
Total Cargo and other revenue	$	216	$	173	$	221

Contract with Customer, Asset and Liability [Table Text Block]

The table below presents a roll forward of the total frequent flyer liability (in millions):

	Twelve Months Ended December 31,
	2021		2020
Total Deferred Revenue balance at January 1	$	2,277	$	1,990
Travel miles and companion certificate redemption - Passenger revenue	(639)		(346)
Miles redeemed on partner airlines - Other revenue	(43)		(23)
Increase in liability for mileage credits issued	763		656
Total Deferred Revenue balance at December 31	$	2,358	$	2,277