Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Passenger Revenue

The following table provides the components of Passenger revenue recognized for the three months ended March 31, 2020 and 2019:

	Three months ended March 31,
(in millions)	2020		2019
Passenger non-loyalty	$	3,220	$	4,043
Passenger loyalty - air transportation	461		535
Passenger ancillary sold separately	164		167
Total passenger revenues	$	3,845	$	4,745

Components of Air Traffic Liability

Rollforwards of the Company's Air traffic liability - loyalty program for the three months ended March 31, 2020 and 2019 were as follows (in millions):

	Three months ended March 31,
	2020			2019
Air traffic liability - loyalty program - beginning balance	$	3,385		$	3,011
Amounts deferred associated with points awarded	656			711
Revenue recognized from points redeemed - Passenger	(461		)	(535		)
Revenue recognized from points redeemed - Other	(19		)	(16		)
Air traffic liability - loyalty program - ending balance	$	3,561		$	3,171

As of March 31, 2020, and December 31, 2019, the components of Air traffic liability and Air traffic liability - noncurrent, including contract liabilities based on tickets sold, unused funds available to the Customer, and loyalty points available for redemption, net of expected spoilage, within the unaudited Condensed Consolidated Balance Sheet were as follows:

	Balance as of
(in millions)	March 31, 2020		December 31, 2019
Air traffic liability - passenger travel and ancillary passenger services	$	2,650	$	2,125
Air traffic liability - loyalty program	3,561		3,385
Total Air traffic liability	$	6,211	$	5,510

Rollforward of Air Traffic Liability

Air traffic liability includes consideration received for ticket and loyalty related performance obligations which have not been satisfied as of a given date. Rollforwards of the amounts included in Air traffic liability as of March 31, 2020 and 2019 were as follows (in millions):

	Air traffic liability
Balance at December 31, 2019	$	5,510
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	4,565
Revenue from amounts included in contract liability opening balances	(1,949		)
Revenue from current period sales	(1,915		)
Balance at March 31, 2020	$	6,211

	Air traffic liability
Balance at December 31, 2018	$	5,070
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	5,704
Revenue from amounts included in contract liability opening balances	(2,008		)
Revenue from current period sales	(2,752		)
Balance at March 31, 2019	$	6,014