Aircraft Portfolio (Details 2) - May. 31, 2015 $ in Millions	USD ($) aircraft item	USD ($) aircraft item
Owned Through Joint Ventures
Aircraft portfolio
Percentage of owned aircraft	50.00%	50.00%
Wholly-Owned
Aircraft portfolio
Percentage of owned aircraft	100.00%	100.00%
Number of Aircraft Sold \| aircraft	2	2
Carrying value of aircraft sold \| $		$ 25.8
Loss on sale of aircraft \| $	$ 11.0	$ 14.8
Aircraft \| Owned Through Joint Ventures
Aircraft portfolio
Owned aircraft, number	3	3
Aircraft \| Owned Through Joint Ventures \| Aircraft Type 767-300 \| Aircraft Manufactured Year 1991 Member \| United Airlines \| Lease Expiration Date (FY) 2022
Aircraft portfolio
Owned aircraft, number	2	2
Aircraft \| Owned Through Joint Ventures \| Aircraft Type 737-400 \| Aircraft Manufactured Year 1993 Member
Aircraft portfolio
Owned aircraft, number	1	1

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- Definition

Represents the number of aircraft owned by the entity.

+ References

No definition available.

+ Details

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- Definition

Represents the number of aircraft sold by the entity.

+ References

No definition available.

+ Details

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- References

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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