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Business Combinations (Narrative) (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Dec. 20, 2018 | Aug. 31, 2019 | Aug. 31, 2018 | May 31, 2019
Business Acquisition [Line Items] |  |  |  |  |
Restricted cash |  | $ 57.7 |  | [1] |
Revenues |  | 992.0 | 862.8 |  |
Net income |  | 264.2 | $ 243.6 | [1] |
Goodwill |  | $ 1,783.1 |  |  | $ 1,782.6
Oasis Outsourcing Group Holdings, L.P. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Effective acquisition date |  | Dec. 20, 2018 |  |  |
Purchase price | $ 992.2 |  |  |  |
Restricted cash | 132.1 |  |  |  |
Credit facility portion of purchase price | 800.0 |  |  |  |
Cash acquired | 262.3 |  |  |  |
Intangible assets | 310.9 |  |  |  |
Goodwill | $ 972.1 |  |  |  |
Oasis Outsourcing Group Holdings, L.P. [Member] | Weighted Average [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Amortization period | 10 years |  |  |  |
[1] | Amounts have been adjusted to reflect adoption of Accounting Standards Update (“ASU”) No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force).”

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