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SEGMENTS - Segment Reporting (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | $ 61,643 | $ 58,048 | $ 50,582
Airline salaries and related costs | 16,161 | 14,607 | 11,902
Aircraft fuel and related costs | 10,566 | 11,069 | 11,482
Depreciation and amortization | 2,513 | 2,341 | 2,107
Operating income | 5,995 | 5,521 | 3,661
Interest expense, net | 747 | 834 | 1,029
Income before income taxes | 4,658 | 5,608 | 1,914
Total assets, end of period | 75,372 | 73,644 | 72,288
Capital expenditures | 5,140 | 5,323 | 6,366
Operating Segments | Airline |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | 57,001 | 54,669 | 45,605
Airline salaries and related costs | 16,161 | 14,607 | 11,902
Aircraft fuel and related costs | 10,566 | 11,069 | 11,482
Depreciation and amortization | 2,513 | 2,341 | 2,107
Other segment items | 21,804 | 21,516 | 17,230
Operating income | 5,957 | 5,136 | 2,884
Interest expense, net | 747 | 834 | 1,029
Other non-operating expense | 590 | 921 | 718
Income before income taxes | 4,620 | 5,223 | 1,137
Total assets, end of period | 72,979 | 71,529 | 69,355
Capital expenditures | 5,075 | 5,088 | 6,217
Operating Segments | Refinery |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | 7,767 | 7,572 | 10,706
Refinery cost of goods sold | 7,234 | 6,665 | 9,442
Depreciation and amortization | 113 | 94 | 93
Other segment items | 382 | 428 | 394
Operating income | 38 | 385 | 777
Interest expense, net | 3 | 17 | 12
Income before income taxes | 35 | 368 | 765
Total assets, end of period | 2,418 | 2,174 | 3,039
Capital expenditures | 65 | 235 | 149
Intersegment Sales/Other |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | (3,125) | (4,193) | (5,729)
Interest expense, net | (3) | (17) | (12)
Income before income taxes | 3 | 17 | 12
Total assets, end of period | (25) | (59) | (106)
Intersegment Sales/Other | Sales to airline segment |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | (1,421) | (1,535) | (1,976)
Intersegment Sales/Other | Exchanged products |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | (1,473) | (2,354) | (3,475)
Intersegment Sales/Other | Sales of refined products |  |  |
Segment Reporting Information, Profit (Loss) |  |  |
Operating revenue | $ (231) | $ (304) | $ (278)

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