Summary of Significant Accounting Policies - Financial Instruments (Details) - USD ($) $ in Millions	May 31, 2024	May 31, 2023
Accounts Receivable
Accounts receivable, net	$ 287.2	$ 241.3
U.S. Government contracts
Accounts Receivable
Accounts receivable, net	43.8	32.0
U.S. Government contracts \| Trade receivables
Accounts Receivable
Trade receivables	34.4	13.1
U.S. Government contracts \| Unbilled receivables
Accounts Receivable
Unbilled receivables	9.4	18.9
All other customers
Accounts Receivable
Accounts receivable, net	243.4	209.3
All other customers \| Trade receivables
Accounts Receivable
Trade receivables	216.1	179.7
All other customers \| Unbilled receivables
Accounts Receivable
Unbilled receivables	$ 27.3	$ 29.6

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9

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- References

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The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

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+ References

No definition available.

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