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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule goodwill and indefinite-lived intangible assets by category |
Goodwill and indefinite-lived intangible assets by category |  |  |
| Carrying Value at | Excess Fair Value at 2023 Testing Date
(in millions) | December 31, 2023 | December 31, 2022
Goodwill | $ | 9,753 |  | $ | 9,753 |  | >100%
International routes and slots | 2,583 |  | 2,583 |  | 20% to >100%
Airline alliances | 1,863 |  | 1,863 |  | 30% to >100%
Delta tradename | 850 |  | 850 |  | >100%
Domestic slots | 622 |  | 622 |  | 60% to >100%
Total | $ | 15,671 |  | $ | 15,671 |  |
Schedule of definite-lived intangible assets by category | Definite-Lived Intangible Assets
Definite-lived intangible assets by category |  |  |  |  |
| December 31, 2023 |  | December 31, 2022
(in millions) | Gross Carrying Value | Accumulated Amortization |  | Gross Carrying Value | Accumulated Amortization
Marketing agreements | $ | 730 |  | $ | (708) |  |  | $ | 730 |  | $ | (704) |
Maintenance contracts | 192 |  | (150) |  |  | 192 |  | (145) |
Other | 54 |  | (53) |  |  | 54 |  | (53) |
Total | $ | 976 |  | $ | (911) |  |  | $ | 976 |  | $ | (902) |

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