Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Fort Lauderdale-Hollywood International Airport [Member]	Jun. 30, 2012 DAL	Dec. 31, 2010 DAL	Mar. 31, 2014 DAL	Mar. 31, 2014 HOU	Mar. 31, 2014 Los Angeles World Airport [Member]
Airport Project [Line Items]
Total Expected Cost Of Airport Project				$ 295			$ 519	$ 156	$ 400
Municipal bonds issued					146	310
AssetsConstructedForOthers	478		453				452	18
Depreciation and amortization	221	210
Construction obligation	$ 450		$ 437