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v3.23.1

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, 2023 | Feb. 28, 2022 | Feb. 28, 2023 | Feb. 28, 2022
Capitalized Contract Cost [Line Items] |  |  |  |
Amortization |  |  | $ 163.0 | $ 150.2
Costs To Fulfill Contracts [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Balance, beginning of period | $ 74.5 | $ 70.5 | 72.3 | 69.3
Capitalization of costs | 8.3 | 7.4 | 23.4 | 21.0
Amortization | (6.6) | (6.3) | (19.5) | (18.7)
Balance, end of period | 76.2 | 71.6 | 76.2 | 71.6
Costs To Obtain Contracts [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Balance, beginning of period | 562.6 | 500.5 | 550.2 | 488.2
Capitalization of costs | 65.2 | 70.1 | 172.2 | 169.1
Amortization | (48.9) | (44.8) | (143.5) | (131.5)
Balance, end of period | $ 578.9 | $ 525.8 | $ 578.9 | $ 525.8

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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