Service Revenue (Summary of Changes in Deferred Costs to Obtain and Fulfill Contracts) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Feb. 28, 2019 |
Feb. 28, 2019 |
Feb. 28, 2018 |
[2] | |||||
| Capitalized Contract Cost [Line Items] | ||||||||
| Amortization | [1] | $ 134.8 | $ 130.5 | |||||
| Costs To Obtain A Contract [Member] | ||||||||
| Capitalized Contract Cost [Line Items] | ||||||||
| Beginning balance | $ 447.3 | 455.0 | ||||||
| Capitalization of costs | 47.9 | 118.2 | ||||||
| Amortization | (39.6) | (117.6) | ||||||
| Ending balance | 455.6 | 455.6 | ||||||
| Costs To Fulfill A Contract [Member] | ||||||||
| Capitalized Contract Cost [Line Items] | ||||||||
| Beginning balance | 65.8 | 65.4 | ||||||
| Capitalization of costs | 5.9 | 17.8 | ||||||
| Amortization | (5.7) | (17.2) | ||||||
| Ending balance | $ 66.0 | $ 66.0 | ||||||
| ||||||||
| X | ||||||||||
- Definition Capitalized Contract Cost No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|