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Aircraft Portfolio (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2012 | Nov. 30, 2011 | Nov. 30, 2012 | Nov. 30, 2011 | May 31, 2012
Aircraft portfolio |  |  |  |  |
Sales from services | $ 221.0 | $ 162.7 | $ 444.0 | $ 316.8 |
Components of investment in the wholly-owned aircraft, after consideration of financing |  |  |  |  |
Debt | (778.9) |  | (778.9) |  | (792.2)
Note payable due July 19, 2012 with interest at 7.22%, payable monthly |  |  |  |  |
Components of investment in the wholly-owned aircraft, after consideration of financing |  |  |  |  |
Debt |  |  |  |  | (8.4)
Debt repayment |  |  | 8.4 |  |
Aircraft | Owned Through Joint Ventures |  |  |  |  |
Aircraft portfolio |  |  |  |  |
Owned aircraft, number | 16 |  | 16 |  |
Number of aircraft for which agreement to sell has been entered into | 10 |  |  |  |
Equity investments | 41.8 |  | 41.8 |  | 41.3
Membership interest in limited liability companies (as a percent) | 50.00% |  | 50.00% |  |
Sales from services |  |  | 0.3 | 0.4 |
Summarized income statement information |  |  |  |  |
Sales | 21.3 | 12.0 | 30.1 | 21.5 |
Income before provision for income taxes | 2.6 | 0.6 | 5.4 | 1.2 |
Number of aircraft sold by joint venture partners | 2 |  |  |  |
Revenue from sale of aircraft by joint venture partners | 13.9 |  |  |  |
Balance sheet information: |  |  |  |  |
Assets | 158.0 |  | 158.0 |  | 169.6
Debt | 65.4 |  | 65.4 |  | 75.6
Members' capital | 87.7 |  | 87.7 |  | 88.8
Aircraft | Wholly-Owned |  |  |  |  |
Aircraft portfolio |  |  |  |  |
Owned aircraft, number | 2 |  | 2 |  |
Components of investment in the wholly-owned aircraft, after consideration of financing |  |  |  |  |
Gross carrying value | 22.9 |  | 22.9 |  | 25.2
Debt |  |  |  |  | (8.4)
Net AAR investment | $ 22.9 |  | $ 22.9 |  | $ 16.8

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