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GOODWILL AND INTANGIBLE ASSETS - Valuation of Goodwill and Indefinite-Lived Intangible (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Goodwill and indefinite-lived intangible assets
Goodwill	$ 9,753	$ 9,753
Total	15,671	15,671
International routes and slots
Goodwill and indefinite-lived intangible assets
Indefinite-lived intangibles	2,583	2,583
Airline alliances
Goodwill and indefinite-lived intangible assets
Indefinite-lived intangibles	1,863	1,863
Delta tradename
Goodwill and indefinite-lived intangible assets
Indefinite-lived intangibles	850	850
Domestic slots
Goodwill and indefinite-lived intangible assets
Indefinite-lived intangibles	$ 622	$ 622

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Indefinite-Lived Intangible Assets And Goodwill

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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