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Acquisitions and Divestitures - Pro Forma Financial Information (Details) - G & K Services - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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May 31, 2017 | May 31, 2016
Business Acquisition [Line Items] |  |
Actual sales of acquired entity included in fiscal 2017 results | $ 187,700 |
Actual net income of acquired entity included in fiscal 2017 results | 5,700 |
Net sales | 6,107,109 | $ 5,762,741
Net income | $ 488,482 | $ 520,224
Earnings per common share - Diluted (in dollars per share) | $ 4.45 | $ 4.66

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