Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Indefinite-Lived Intangible Assets

	Carrying Amount at December 31,
(in millions)	2014		2013
International routes and slots	$	2,287	$	2,287
Delta tradename	850		850
SkyTeam related assets	661		661
Domestic slots	622		622
Total	$	4,420	$	4,420

Definite-Lived Intangible Assets

	December 31, 2014					December 31, 2013
(in millions)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Marketing agreements	$	730	$	(648	)	$	730	$	(602	)
Contracts	193		(92		)	193		(83		)
Other	53		(53		)	53		(53		)
Total	$	976	$	(793	)	$	976	$	(738	)

Schedule of Estimated Future Aggregate Amortization Expense

The following table summarizes the estimated aggregate amortization expense for each of the five succeeding fiscal years:

Years Ending December 31, (in millions)
2015	$	18
2016	18
2017	17
2018	17
2019	16