Aircraft Portfolio (Details 2) (Aircraft)	3 Months Ended
	Nov. 30, 2012 item
Owned Through Joint Ventures
Aircraft portfolio
Owned aircraft, number	16
Number of aircraft for which agreement to sell has been entered into	10
Owned Through Joint Ventures | Aircraft Type 767-300 | United Airlines | Lease Expiration Date (FY) 2016 and 2017
Aircraft portfolio
Owned aircraft, number	2
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) 2013
Aircraft portfolio
Owned aircraft, number	10
Number of aircraft for which agreement to sell has been entered into	10
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) Various
Aircraft portfolio
Owned aircraft, number	14
Owned Through Joint Ventures | Aircraft Type 737-400 | Malaysia Airlines | Lease Expiration Date (FY) 2014
Aircraft portfolio
Owned aircraft, number	4
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1992 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	5
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1993 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	6
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1994 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	2
Owned Through Joint Ventures | Aircraft Type 737-400 | Year Manufactured (FY) 1997 | Malaysia Airlines
Aircraft portfolio
Owned aircraft, number	1
Wholly-Owned
Aircraft portfolio
Owned aircraft, number	2
Wholly-Owned | Aircraft Type 737-300 | Small Planet Airlines | Lease Expiration Date (FY) 2015
Aircraft portfolio
Owned aircraft, number	1
Wholly-Owned | Aircraft Type A320 | Dombassaero Airlines | Lease Expiration Date (FY) 2017
Aircraft portfolio
Owned aircraft, number	1