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Revenue Recognition (Tables)
 3 Months Ended
Mar. 31, 2024
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue The following table provides revenue recognized by revenue source for the three months ended March 31, 2024 and 2023 (in millions):
Three Months Ended March 31,
20242023
Passenger revenue
Passenger travel$1,888 $2,026 
Loyalty revenue - air transportation167 156 
Other revenue
Loyalty revenue107 100 
Other revenue47 46 
Total operating revenue$2,209 $2,328 
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):
March 31, 2024December 31, 2023
Air traffic liability - passenger travel$1,354 $1,099 
Air traffic liability - loyalty program (air transportation)1,076 1,072 
Deferred revenue (1)
472 487 
Total$2,902 $2,658 
    
(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 three months ended March 31, 2024 and 2023 (in millions):
Balance at December 31, 2023$1,072 
TrueBlue® points redeemed passenger
(160)
TrueBlue® points redeemed other
(7)
TrueBlue® points earned and sold
171 
Balance at March 31, 2024$1,076 
Balance at December 31, 2022$1,000 
TrueBlue® points redeemed passenger
(156)
TrueBlue® points redeemed other
— 
TrueBlue® points earned and sold
154 
Balance at March 31, 2023$998