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v3.20.2

Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2020 | May 31, 2019 | May 31, 2018
Income taxes paid | $ 298.8 | $ 317.9 | $ 319.1
Interest expense paid | $ 38.0 | $ 10.4 | 4.0
Common stock issued in connection to acquisition |  |  | 33.2
HR Outsourcing Holdings, Inc. [Member] |  |  |
Common stock issued in connection to acquisition |  |  | $ 33.2

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