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Investments (Tables)
 12 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of fair value investments ownership interest and carrying value
Equity investments ownership interest and carrying value
Accounting TreatmentOwnership InterestCarrying Value
(in millions)December 31, 2021December 31, 2020December 31, 2021December 31, 2020
Wheels UpFair Value21 %24 %$241 $210 
Hanjin-KALFair Value13 %13 %455 512 
Air France-KLMFair Value6 %9 %165 235 
China EasternFair Value2 %3 %177 201 
CLEARFair Value6 %6 %260 120 
Unifi AviationEquity Method49 %49 %159 154 
Other investmentsVarious255 233 
Equity investments$1,712 $1,665 
Schedule of equity method investments ownership interest and carrying value
Equity investments ownership interest and carrying value
Accounting TreatmentOwnership InterestCarrying Value
(in millions)December 31, 2021December 31, 2020December 31, 2021December 31, 2020
Wheels UpFair Value21 %24 %$241 $210 
Hanjin-KALFair Value13 %13 %455 512 
Air France-KLMFair Value6 %9 %165 235 
China EasternFair Value2 %3 %177 201 
CLEARFair Value6 %6 %260 120 
Unifi AviationEquity Method49 %49 %159 154 
Other investmentsVarious255 233 
Equity investments$1,712 $1,665