Fair value of guarantee obligation recorded as current liability.

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Percentage of guarantee on outstanding debt.

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No definition available.

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The amount of loan outstanding to the joint venture.

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No definition available.

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

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Joint Ventures - Investments in Joint Ventures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Investments in Joint Ventures
Income (losses) from joint ventures	$ (0.2)	$ (1.7)	$ (0.5)	$ (3.0)
AAR sumisho aviation services
Investments in Joint Ventures
Income (losses) from joint ventures	3.5	0.2	4.1	0.7
Aircraft Joint Ventures
Investments in Joint Ventures
Income (losses) from joint ventures	0.3	0.3	1.1	0.6
Owned Through Joint Ventures \| Joint venture in India
Investments in Joint Ventures
Investments in joint ventures	$ 6.3		$ 6.3
Ownership interest in joint ventures (as a percent)	40.00%		40.00%
Percentage on outstanding debt	40.00%		40.00%
Amount of guarantee liability recognized	$ 9.4		$ 9.4
Loan to joint venture	3.5		3.5
Income (losses) from joint ventures	$ 0.1	$ 1.2	$ 0.0	$ 2.0
Owned Through Joint Ventures \| AAR sumisho aviation services
Investments in Joint Ventures
Ownership interest in joint ventures (as a percent)	50.00%		50.00%
Owned Through Joint Ventures \| Joint venture in India to operate an airframe maintenance facility
Investments in Joint Ventures
Investments in joint ventures	$ 9.8		$ 9.8