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Basis of Presentation - Schedule of Impact of Adopting New Revenue Guidance Income Statement (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Aug. 31, 2018 | Aug. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | $ 1,697,975 | $ 1,611,503
Selling and administrative expenses | 504,634 | 486,283
Operating income | 265,228 | 249,099
Income (loss) before income taxes | 241,420 | 219,079
Income taxes | 28,873 | 57,971
Income from continuing operations | 212,547 | 161,108
Net income | $ 212,515 | $ 217,211
Diluted earnings per share (in dollars per share) | $ 1.89 | $ 1.96
Under Historical Guidance |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | $ 1,698,493 |
Selling and administrative expenses | 511,674 |
Operating income | 259,112 |
Income (loss) before income taxes | 235,304 |
Income taxes | 27,328 |
Income from continuing operations | 207,976 |
Net income | $ 207,944 |
Diluted earnings per share (in dollars per share) | $ 1.85 |
Impact of Adopting ASU 2014-09 | Accounting Standards Update 2014-09 |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | $ (518) |
Selling and administrative expenses | (7,040) |
Operating income | 6,116 |
Income (loss) before income taxes | 6,116 |
Income taxes | 1,545 |
Income from continuing operations | 4,571 |
Net income | $ 4,571 |
Diluted earnings per share (in dollars per share) | $ 0.04 |
Uniform Rental and Facility Services |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | $ 1,374,938 | $ 1,311,784
Cost of revenue | 746,453 | 706,863
Uniform Rental and Facility Services | Under Historical Guidance |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | 1,375,833 |
Uniform Rental and Facility Services | Impact of Adopting ASU 2014-09 | Accounting Standards Update 2014-09 |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | (895) |
Other |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | 323,037 | 299,719
Cost of revenue | 176,810 | $ 165,287
Other | Under Historical Guidance |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | 322,660 |
Cost of revenue | 176,404 |
Other | Impact of Adopting ASU 2014-09 | Accounting Standards Update 2014-09 |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Total revenue | 377 |
Cost of revenue | $ 406 |

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