v3.26.1
Property and Equipment, Net of Accumulated Depreciation (Components of Property and Equipment, at Cost) (Details) - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 1,915.8 $ 1,726.7
Less: Accumulated depreciation 1,326.9 1,215.2
Property and equipment, net of accumulated depreciation 588.9 511.5
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 10.9 13.0
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 151.5 152.3
Data Processing Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 252.9 242.8
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross [1] 1,322.5 1,129.7
Furniture, Fixtures, and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 72.9 69.8
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 59.6 51.6
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross [1] $ 45.5 $ 67.5
[1] Software includes both purchased software and costs capitalized related to internally developed software placed in service. Capitalized costs related to internally developed software that has not yet been placed in service is included in construction in progress.