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Revenue Recognition (Tables)
9 Months Ended
Sep. 30, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue The following table provides the revenues recognized by revenue source for the three and nine months ended September 30, 2022 and 2021 (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Passenger revenue
Passenger travel$2,308 $1,773 $5,959 $3,717 
Loyalty revenue - air transportation107 83 360 196 
Other revenue
Loyalty revenue102 80 287 206 
Other revenue45 36 137 84 
Total revenue$2,562 $1,972 $6,743 $4,203 
Contract with customer, contract asset, contract liability, and receivable
Our contract liabilities primarily consist of ticket sales for which transportation has not yet been provided, unused credits available to customers, and outstanding loyalty points available for redemption (in millions):
September 30, 2022December 31, 2021
Air traffic liability - passenger travel$1,443 $1,323 
Air traffic liability - loyalty program (air transportation)976 891 
Deferred revenue(1)
547 613 
Total2,966 2,827 
(1) Deferred revenue is included within other accrued liabilities and other liabilities on our consolidated balance sheets.
The table below presents the activity of the current and non-current air traffic liability for our loyalty program, and includes points earned and sold to participating companies for the nine months ended September 30, 2022 and 2021 (in millions):
Balance at December 31, 2021$891 
TrueBlue® points redeemed
(360)
TrueBlue® points earned and sold
445 
Balance at September 30, 2022$976 
Balance at December 31, 2020$733 
TrueBlue® points redeemed
(196)
TrueBlue® points earned and sold
308 
Balance at September 30, 2021$845