Amount of cumulative premiums paid and expected to be reimbursed upon termination of the policies.

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Represents the term of agreement.

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Net carrying amount as of the balance sheet date of certain rights acquired to exercise a certain privilege or pursue a particular business or occupation and which is deemed to have a finite economic life.

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Fair value of guarantee obligation recorded as current liability.

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Percentage of guarantee on outstanding debt.

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The amount of loan outstanding to the joint venture.

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The amount of benefit recognized from termination of corporate-owned split-dollar life insurance policy for recovery of taxes previously paid on behalf of employees.

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The payment for evaluation and inspection services in relation to the divestiture of aircraft.

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Amount of cash inflow for proceeds from termination of corporate-owned life insurance policy for reimbursement of premiums paid, and a portion of prior tax payments made on behalf of employees.

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Amount of cash inflow for proceeds from termination of corporate-owned split-dollar life insurance policy for reimbursement of premiums paid.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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Other Non-current Assets - Investments in Joint Ventures (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2011	Nov. 30, 2020	May 31, 2020	May 31, 2021	May 31, 2020	May 31, 2019
Investments in Joint Ventures
Investments in joint ventures				$ 17.8	$ 18.3	$ 17.8
License Fees
Unamortized balance of the license				4.1	25.0	4.1
Cumulative premiums paid					5.5
Proceeds from termination of split-dollar life insurance agreement			$ 12.0
Proceeds from termination of split-dollar life insurance agreements premiums paid					10.0
Net recoveries of prior taxes paid on behalf of employees			$ 1.3
Unison Industries
License Fees
Agreement period (in years)		10 years
Payment of license fee	$ 25.0
License fee capitalized	$ 25.0
Unamortized balance of the license					23.8
Owned Through Joint Ventures
Investments in Joint Ventures
Investments in joint ventures					$ 10.0
Membership interest in joint ventures (as a percent)					40.00%
Amount of guarantee liability recognized					$ 8.7
Percentage on outstanding debt					40.00%
Loan to joint venture					$ 3.1
License Fees
Impairment charge				$ 1.9
Owned Through Joint Ventures \| Aircraft
Investments in Joint Ventures
Payment of evaluation and inspection services					$ 1.0	$ 1.6	$ 0.4