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Other Non-current Assets - Investments in Joint Ventures (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021
Investments in Joint Ventures |  |  |  |  |
Income (losses) from joint ventures | $ 0.6 | $ (0.7) | $ (0.3) | $ (1.3) |
Owned Through Joint Ventures | Joint venture in India |  |  |  |  |
Investments in Joint Ventures |  |  |  |  |
Investments in joint ventures | $ 6.5 |  | $ 6.5 |  | $ 10.0
Ownership interest in joint ventures (as a percent) |  |  |  |  | 40.00%
Percentage on outstanding debt | 40.00% |  | 40.00% |  |
Amount of guarantee liability recognized | $ 9.5 |  | $ 9.5 |  |
Loan to joint venture | 3.5 |  | 3.5 |  |
Income (losses) from joint ventures | $ 0.7 | $ (0.6) | $ 0.1 | $ (0.8) |

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