Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Aug. 31, 2022 |
Aug. 31, 2021 |
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| Capitalized Contract Cost [Line Items] | ||
| Amortization | $ 53.0 | $ 49.1 |
| Costs To Fulfill Contracts [Member] | ||
| Capitalized Contract Cost [Line Items] | ||
| Balance, beginning of period | 72.3 | 69.3 |
| Capitalization of costs | 7.5 | 7.1 |
| Amortization | (6.4) | (6.2) |
| Balance, end of period | 73.4 | 70.2 |
| Costs To Obtain Contracts [Member] | ||
| Capitalized Contract Cost [Line Items] | ||
| Balance, beginning of period | 550.2 | 488.2 |
| Capitalization of costs | 57.0 | 46.6 |
| Amortization | (46.6) | (42.9) |
| Balance, end of period | $ 560.6 | $ 491.9 |
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- Definition Capitalized Contract Cost No definition available.
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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