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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions | Mar. 21, 2017 | Aug. 31, 2018 | May 31, 2018
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Business Acquisition [Line Items] |  |  |
Reserve for obsolete inventory |  | $ 31.2 | $ 37.0
G&K Services |  |  |
Business Acquisition [Line Items] |  |  |
Consideration transferred | $ 2,100.0 |  |

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