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COMMITMENTS (Tables)
 6 Months Ended
Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases and Unrecorded Unconditional Purchase Obligtaions
Future minimum payments for commitments as of June 30, 2021 (in millions):
Aircraft Commitments(a)
Capacity Purchase Agreements (b)
Remainder of 2021$107 $82 
20221,458 173 
20231,207 178 
2024291 183 
202576 188 
Thereafter12 877 
Total$3,151 $1,681 
(a)Includes non-cancelable contractual commitments for aircraft and engines, aircraft maintenance and parts management.
(b)Includes all non-aircraft lease costs associated with capacity purchase agreements.