XML 38 R28.htm IDEA: XBRL DOCUMENT v3.22.2
Summary of Significant Accounting Policies - Other Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Accounting Policies [Abstract]    
Cost method investments - jetblue tech ventures $ 77 $ 72
Measurement alternative, ownership percentage 10.00%  
Cost method investments - TWA flight center hotel $ 14 $ 14