Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.4
Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2022
Nov. 30, 2021
Capitalized Contract Cost [Line Items]        
Amortization     $ 107.5 $ 99.1
Costs To Fulfill Contracts [Member]        
Capitalized Contract Cost [Line Items]        
Balance, beginning of period $ 73.4 $ 70.2 72.3 69.3
Capitalization of costs 7.6 6.5 15.1 13.6
Amortization (6.5) (6.2) (12.9) (12.4)
Balance, end of period 74.5 70.5 74.5 70.5
Costs To Obtain Contracts [Member]        
Capitalized Contract Cost [Line Items]        
Balance, beginning of period 560.6 491.9 550.2 488.2
Capitalization of costs 50.0 52.4 107.0 99.0
Amortization (48.0) (43.8) (94.6) (86.7)
Balance, end of period $ 562.6 $ 500.5 $ 562.6 $ 500.5