Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
[1],[2] | ||||||
| Capitalized Contract Cost [Line Items] | |||||||||
| Amortization | $ 180.2 | $ 174.7 | [1],[2] | $ 169.4 | |||||
| Costs To Obtain A Contract [Member] | |||||||||
| Capitalized Contract Cost [Line Items] | |||||||||
| Beginning balance | 455.0 | ||||||||
| Capitalization of costs | 166.5 | ||||||||
| Amortization | (157.2) | ||||||||
| Ending balance | 464.3 | 455.0 | |||||||
| Costs To Fulfill A Contract [Member] | |||||||||
| Capitalized Contract Cost [Line Items] | |||||||||
| Beginning balance | 65.4 | ||||||||
| Capitalization of costs | 23.7 | ||||||||
| Amortization | (23.0) | ||||||||
| Ending balance | $ 66.1 | $ 65.4 | |||||||
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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