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Investments (Tables)
9 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Summary of equity investments ownership and carrying value - fair value
Equity investments ownership interest and carrying value
Accounting TreatmentOwnership InterestCarrying Value
(in millions)September 30, 2021December 31, 2020September 30, 2021December 31, 2020
Wheels UpFair Value21 %24 %$343 $210 
Hanjin-KALFair Value13 %13 %456 512 
Air France-KLMFair Value%%184 235 
China EasternFair Value%%179 201 
CLEARFair Value%%340 120 
Unifi AviationEquity Method49 %49 %167 154 
Other investmentsVarious250 233 
Equity investments$1,919 $1,665 
Summary of equity investments ownership and carrying value - equity method
Equity investments ownership interest and carrying value
Accounting TreatmentOwnership InterestCarrying Value
(in millions)September 30, 2021December 31, 2020September 30, 2021December 31, 2020
Wheels UpFair Value21 %24 %$343 $210 
Hanjin-KALFair Value13 %13 %456 512 
Air France-KLMFair Value%%184 235 
China EasternFair Value%%179 201 
CLEARFair Value%%340 120 
Unifi AviationEquity Method49 %49 %167 154 
Other investmentsVarious250 233 
Equity investments$1,919 $1,665