REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Disaggregation of Revenue

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cargo revenue	$	34	$	32	$	60	$	56
Other revenue	17		16		31		30
Total Cargo and other revenue	$	51	$	48	$	91	$	86

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Passenger revenue	$	167	$	143	$	306	$	271
Mileage PlanTM other revenue	108		109		215		209
Total Mileage Plan™ revenue	$	275	$	252	$	521	$	480

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Passenger ticket revenue, including ticket breakage and net of taxes and fees	$	1,693	$	1,668	$	3,121	$	3,026
Passenger ancillary revenue	137		134		255		250
Mileage PlanTM passenger revenue	167		143		306		271
Total passenger revenue	$	1,997	$	1,945	$	3,682	$	3,547

Contract with Customer Liabilities

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

	Six Months Ended June 30,
	2018			2017
Total Deferred Revenue balance at January 1	$	1,725		$	1,534
Travel miles and companion certificate redemption - Passenger revenue	(306		)	(271		)
Miles redeemed on partner airlines - Other revenue	(44		)	(44		)
Increase in liability for mileage credits issued	402			382
Total Deferred Revenue balance at June 30	$	1,777		$	1,601