REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

3 Months Ended

Mar. 31, 2018

Revenue Recognition [Abstract]

Disaggregation of Revenue

Cargo and other revenue included in the condensed consolidated statements of operations for the three months ended March 31,2018 and 2017 (in millions):

	Three Months Ended March 31,
	2018		2017
Cargo revenue	$	26	$	24
Other revenue	14		14
Total Cargo and other revenue	$	40	$	38

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

	Three Months Ended March 31,
	2018		2017
Passenger ticket revenue, including ticket breakage and net of taxes and fees	$	1,428	$	1,358
Passenger ancillary revenue	118		116
Mileage PlanTM passenger revenue	139		128
Total passenger revenue	$	1,685	$	1,602

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

	Three Months Ended March 31,
	2018		2017
Passenger revenue	$	139	$	128
Mileage PlanTM other revenue	107		100
Total Mileage Plan™ revenue	$	246	$	228

Contract with Customer Liabilities

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

	Three Months Ended March 31,
	2018			2017
Total Deferred Revenue balance at January 1	$	1,726		$	1,535
Travel miles and companion certificate redemption - Passenger revenue	(139		)	(128		)
Miles redeemed on partner airlines - Other revenue	(19		)	(23		)
Increase in liability for mileage credits issued	183			185
Total Deferred Revenue balance at March 31	$	1,751		$	1,569