Quarterly report pursuant to Section 13 or 15(d)

Service Revenue (Summary of Changes in Deferred Revenue Related to Set-Up Fees) (Details)

v3.22.2.2
Service Revenue (Summary of Changes in Deferred Revenue Related to Set-Up Fees) (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Revenue from Contract with Customer [Abstract]    
Balance, beginning of period $ 48.9 $ 40.2
Deferral of revenue 10.1 7.6
Recognition of unearned revenue (6.8) (6.3)
Balance, end of period $ 52.2 $ 41.5