Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of indefinite-lived intangible assets

Indefinite-Lived Intangible Assets

	Carrying Value at December 31,
(in millions)	2017		2016
International routes and slots	$	2,583	$	2,563
Delta tradename	850		850
SkyTeam-related assets	661		661
Domestic slots	622		622
Total	$	4,716	$	4,696

Schedule of definite-lived intangible assets

Definite-Lived Intangible Assets

	December 31, 2017					December 31, 2016
(in millions)	Gross Carrying Value		Accumulated Amortization			Gross Carrying Value		Accumulated Amortization
Marketing agreements	$	730	$	(677	)	$	730	$	(667	)
Contracts	193		(115		)	193		(108		)
Other	53		(53		)	53		(53		)
Total	$	976	$	(845	)	$	976	$	(828	)