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Segment Information - Summary of Net Property and Equipment Disaggregated by Country (Detail) - USD ($) $ in Millions | May 31, 2026 | May 31, 2025
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Property and Equipment, net | $ 329.8 | $ 339.1
United States [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property and Equipment, net | 282.9 | 278.4
United Kingdom [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property and Equipment, net | 10.9 | 12.5
Other [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property and Equipment, net | $ 36.0 | $ 48.2

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