Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified					0 Months Ended	3 Months Ended					0 Months Ended
	Dec. 09, 2013	Nov. 11, 2013 Boston Logan International Airport [Member] gate	Nov. 11, 2013 LaGuardia Airport [Member] slot	Nov. 11, 2013 DCA [Member] slot	Nov. 11, 2013 Merger Agreement [Domain]	Mar. 31, 2014 US Airways Sabre Matter [Member] claim	Dec. 09, 2013 AA [Member]	Nov. 11, 2013 AA [Member] Boston Logan International Airport [Member] gate	Nov. 11, 2013 AA [Member] LaGuardia Airport [Member] slot	Nov. 11, 2013 AA [Member] DCA [Member] slot	Nov. 11, 2013 AA [Member] Merger Agreement [Domain]
Loss Contingencies [Line Items]
Reserve for disputed claims	$ 755						$ 755
Required period to divest and not reacquire assets					10 years						10 years
Settlement agreement, slot pairs divested			17	52					17	52
Assets sold under bankruptcy agreement		2						2
Number of counts allowed to proceed (claims)						2
Number of complaints filed (claims)						4