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Operating Leases (Tables)
6 Months Ended
Jun. 30, 2024
Leases [Abstract]  
Schedule of Lease Costs
The table below presents certain information related to lease costs for operating leases during the three and six months ended June 30, 2024 and 2023 (in millions):
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Operating lease cost(a)
$155 $131 $302 $258 
Variable lease cost(a)
94 70 173 144 
Total lease costs$249 $201 $475 $402 
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(a)    Expenses are included within aircraft rent, station operations, maintenance, materials and repairs and other operating within the Company’s condensed consolidated statements of operations.