Quarterly report pursuant to Section 13 or 15(d)

Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details)

v3.24.3
Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details) - USD ($)
$ in Millions
 3 Months Ended
Aug. 31, 2024
Aug. 31, 2023
Capitalized Contract Cost [Line Items]    
Amortization $ 58.5 $ 57.2 [1]
Costs To Fulfill Contracts [Member]    
Capitalized Contract Cost [Line Items]    
Balance, beginning of period 76.6 75.3
Capitalization of costs 6.3 6.5
Amortization (6.7) (6.6)
Balance, end of period 76.2 75.2
Costs To Obtain Contracts [Member]    
Capitalized Contract Cost [Line Items]    
Balance, beginning of period 609.4 597.5
Capitalization of costs 45.3 55.7
Amortization (51.8) (50.6)
Balance, end of period $ 602.9 $ 602.6
[1] The consolidated statement of cash flows for the three months ended August 31, 2023 includes revisions to previously reported amounts related to the presentations of cash flows associated with short-term receivable purchased from the Company's clients under non-recourse arrangements, net of funding reserves. See Note A for further discussion on the revision.