Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
May 31, 2021	May 31, 2020
Fair Value Disclosures [Abstract]
Settlements of contingent consideration obligations	$ 2.8	$ 6.4

Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

Name:	us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration