Slot Divestiture (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013
Noncash or Part Noncash Divestitures [Line Items]
Net proceeds from slot transaction	$ 307	$ 307	$ 0
Gain related to sale of DCA slots	309	309
AA [Member]
Noncash or Part Noncash Divestitures [Line Items]
Net proceeds from slot transaction		299	0
Number of slots sold, John F. Kennedy Airport (slots)		24
Gain related to sale of DCA slots		$ 305
John F. Kennedy Airport [Member]
Noncash or Part Noncash Divestitures [Line Items]
Number of slots sold, John F. Kennedy Airport (slots)	24