Commitments and Contingencies (Details 1) (Airline Capacity Purchase Arrangements [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Airline Capacity Purchase Arrangements [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Aircraft Purchase Commitments, Due in 2014	$ 2,110	[1]
Aircraft Purchase Commitments, Due in 2015	2,040	[1]
Aircraft Purchase Commitments, Due in 2016	1,780	[1]
Aircraft Purchase Commitments, Due in 2017	1,560	[1]
Aircraft Purchase Commitments, Due in 2018	1,320	[1]
Aircraft Purchase Commitments, Due after 2018	1,930	[1]
Aircraft Purchase Commitments, Total	$ 10,740	[1]

[1] These amounts exclude Contract Carrier payments accounted for as operating leases of aircraft, which are described in Note 9. The contingencies described below under “Contingencies Related to Termination of Contract Carrier Agreements” are also excluded from this table.