Leases (Details) (USD $)	3 Months Ended				9 Months Ended			3 Months Ended
	Mar. 31, 2013 aircraft	Sep. 30, 2014 B-717-200 Aircraft aircraft	Jun. 30, 2014 B-717-200 Aircraft	Sep. 30, 2012 B-717-200 Aircraft	Sep. 30, 2014 B-717-200 Aircraft aircraft	Jul. 09, 2012 B-717-200 Aircraft aircraft	Sep. 30, 2014 B-717-200 Aircraft Remainder of Current Year aircraft	Sep. 30, 2014 Maximum B-717-200 Aircraft	Sep. 30, 2014 Minimum B-717-200 Aircraft
Aircraft Type [Line Items]
Lessee		Delta Air Lines, Inc.
Total assets available for lease/sublease, number of units						88
Number of aircraft expected to be delivered to sublessee							45
Number of Aircraft Expected To Be Converted to Sublease Per Month		3			3
Transfer from leased to owned aircraft	2
Operating lease, number of units		76			76
Owned assets, number of units		10			10
Capital leased assets, number of units		2			2
Sublease terms for leased aircraft								9 years	2 years
Lease terms for owned aircraft								7 years
Contingent payments		$ 0			$ 0
Residual value		0			0
Estimated loss on sublease				137,000,000
Additional Estimated Loss on Sublease			$ 17,000,000		$ 19,000,000