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Goodwill, Service Contracts and Other Assets - Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2019 | May 31, 2018
Goodwill [Roll Forward] |  |
Balance at the beginning of the period | $ 2,846,888 | $ 2,782,335
Goodwill acquired | 6,637 | 61,461
Foreign currency translation | (11,084) | 3,092
Balance at the end of the period | 2,842,441 | 2,846,888
G & K Services |  |
Goodwill [Roll Forward] |  |
Preliminary purchase price allocation adjustment |  | 52,700
Uniform Rental and Facility Services |  |
Goodwill [Roll Forward] |  |
Balance at the beginning of the period | 2,505,476 | 2,448,070
Goodwill acquired | 1,153 | 55,152
Foreign currency translation | (10,227) | 2,254
Balance at the end of the period | 2,496,402 | 2,505,476
First Aid and Safety Services |  |
Goodwill [Roll Forward] |  |
Balance at the beginning of the period | 244,279 | 243,112
Goodwill acquired | 0 | 370
Foreign currency translation | (820) | 797
Balance at the end of the period | 243,459 | 244,279
All Other |  |
Goodwill [Roll Forward] |  |
Balance at the beginning of the period | 97,133 | 91,153
Goodwill acquired | 5,484 | 5,939
Foreign currency translation | (37) | 41
Balance at the end of the period | $ 102,580 | $ 97,133

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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