XML 43 R33.htm IDEA: XBRL DOCUMENT v3.23.2
Revenue Recognition - Revenue Recognized By Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]        
Passenger travel $ 2,289 $ 2,162 $ 4,315 $ 3,651
Loyalty revenue - air transportation 171 140 326 253
Loyalty revenue 104 95 204 184
Other revenue 46 48 92 93
Total revenue $ 2,610 $ 2,445 $ 4,937 $ 4,181