Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	Oct. 15, 2013 Subsequent Event [Member]	Sep. 30, 2013 Airbus A320 Family [Member] aircraft	Sep. 30, 2013 Airbus A320 Family [Member] Subsequent Event [Member] aircraft	Sep. 30, 2013 Airbus A320 NEO Family [Member] Subsequent Event [Member] aircraft	Sep. 30, 2013 PurePower PW1100G-JM Engine [Member] aircraft_engine	Sep. 30, 2013 PurePower PW1100G-JM Engine [Member] Subsequent Event [Member] aircraft_engine	Sep. 30, 2013 V2500 SelectOne Engine [Member] aircraft_engine	Sep. 30, 2013 V2500 SelectOne Engine [Member] Subsequent Event [Member] aircraft_engine
Subsequent Event [Line Items]
Number of spare aircraft engines ordered (in aircraft engine)					9	119	6
Number of aircraft ordered (in aircraft)		115	45	55
Number of aircraft engines ordered with maintenance service agreements, future deliveries (in aircraft engine)								96
Number of aircraft engines ordered with maintenance service agreements, including future deliveries (in aircraft engine)								147
Loss contingency, range of possible loss, maximum	$ 10