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v3.26.1

Revenue Recognition - Summary of Disaggregated Revenue (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2026 | May 31, 2025 | May 31, 2024
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 870.4 | $ 894.7 | $ 924.2
Food Safety |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 641.1 | 638.1 | 655.3
Food Safety | Natural Toxins & Allergens |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 77.5 | 77.0 | 82.2
Food Safety | Bacterial & General Sanitation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 175.4 | 164.8 | 171.2
Food Safety | Indicator Testing & Culture Media |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 332.7 | 312.2 | 322.0
Food Safety | Rodenticides, Insecticides & Disinfectants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 18.2 | 47.0 | 43.0
Food Safety | Genomics Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 24.6 | 23.4 | 24.3
Food Safety | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 12.7 | 13.7 | 12.6
Animal Safety |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 229.3 | 256.6 | 268.9
Animal Safety | Life Sciences |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 6.6 | 6.5 | 6.5
Animal Safety | Animal Care & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 29.3 | 34.7 | 37.0
Animal Safety | Veterinary Instruments & Disposables |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 56.9 | 61.5 | 65.8
Animal Safety | Rodenticides, Insecticides & Disinfectants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 68.9 | 88.1 | 88.7
Animal Safety | Genomics Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 67.6 | $ 65.8 | $ 70.8

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