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COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases and Unrecorded Unconditional Purchase Obligtaions [Table Text Block] Future minimum payments for commitments as of December 31, 2021 (in millions):
 
Aircraft Commitments(a)
Capacity Purchase Agreements(b)
2022$1,339 $173 
20231,686 178 
2024389 183 
202579 188 
202613 189 
Thereafter— 688 
Total$3,506 $1,599