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Goodwill and Intangible Assets, Net of Accumulated Amortization (Tables) | 3 Months Ended
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Aug. 31, 2018
Goodwill and Intangible Assets, Net of Accumulated Amortization [Abstract] |
Components of Intangible Assets, at Cost | ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | August 31, |  | May 31,
﻿In millions |  | 2018 |  | 2018
﻿Client lists |  | $ | 307.4 |  | $ | 308.5
﻿Other intangible assets |  |  | 13.3 |  |  | 13.3
﻿Total intangible assets, gross |  |  | 320.7 |  |  | 321.8
﻿Less: Accumulated amortization |  |  | 185.2 |  |  | 180.4
﻿Intangible assets, net of accumulated amortization |  | $ | 135.5 |  | $ | 141.4
﻿
Estimated Amortization Expense |
﻿ |  |  |
﻿In millions |  | Estimated amortization
﻿Year ending May 31, |  | expense
﻿2019 |  | $ | 26.0
﻿2020 |  |  | 22.6
﻿2021 |  |  | 19.5
﻿2022 |  |  | 16.6
﻿2023 |  |  | 14.2
﻿

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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