v3.26.1
Employee Benefit Plans - Schedule for measurement of benefit plan assets at fair value (Details) - Pension Plans - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
May 31, 2024
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 29.5 $ 20.1  
Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.8  
Pooled, Common and Collective Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7.6  
Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8.6  
Annuities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 29.5 3.1  
UNITED KINGDOM      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 29.5 20.1 $ 21.4
UNITED KINGDOM | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.8  
UNITED KINGDOM | Level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.8  
UNITED KINGDOM | Level 1 | Pooled, Common and Collective Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 1 | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 1 | Annuities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
UNITED KINGDOM | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 16.2  
UNITED KINGDOM | Level 2 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 2 | Pooled, Common and Collective Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7.6  
UNITED KINGDOM | Level 2 | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8.6  
UNITED KINGDOM | Level 2 | Annuities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
UNITED KINGDOM | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 29.5 3.1  
UNITED KINGDOM | Level 3 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 3 | Pooled, Common and Collective Funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 3 | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
UNITED KINGDOM | Level 3 | Annuities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 29.5 $ 3.1