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REVENUE RECOGNITION (Tables)
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Operating Revenue by Geographic Region The Company further disaggregates its operating revenue by principal geographic region for the years ended December 31 is presented in the table below (in millions):
202420232022
Domestic (U.S. and Canada)$34,067 $32,400 $28,474 
Atlantic11,097 10,982 9,072 
Pacific6,462 5,267 2,927 
Latin America5,437 5,068 4,482 
Total$57,063 $53,717 $44,955 
Schedule of Roll Forward of Frequent Flyer Deferred Revenue The table below presents a roll forward of Frequent flyer deferred revenue (in millions):
20242023
Balance at January 1$7,143 $6,675 
Miles earned3,563 3,297 
Travel miles redeemed(3,150)(2,723)
Non-travel miles redeemed(115)(106)
Balance at December 31$7,441 $7,143