Annual report [Section 13 and 15(d), not S-K Item 405]

Property and Equipment, Net of Accumulated Depreciation (Components of Property and Equipment, at Cost) (Details)

v3.25.2
Property and Equipment, Net of Accumulated Depreciation (Components of Property and Equipment, at Cost) (Details) - USD ($)
$ in Millions
May 31, 2025
May 31, 2024
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 1,726.7 $ 1,544.0
Less: Accumulated depreciation 1,215.2 1,132.3
Property and equipment, net of accumulated depreciation 511.5 411.7
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 13.0 9.0
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 152.3 131.4
Data Processing Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 242.8 213.3
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross [1] 1,129.7 1,010.1
Furniture, Fixtures, and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 69.8 71.9
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 51.6 47.6
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross [1] $ 67.5 $ 60.7
[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.