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Segment Information - Information Related to Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2018 | Nov. 30, 2017 | Jun. 01, 2018 | May 31, 2018
Segment Reporting Information |  |  |  |  |  |
Revenue | $ 1,718,268 | $ 1,606,441 | $ 3,416,243 | $ 3,217,944 |  |
Income (loss) before income taxes | 320,524 | 206,373 | 561,944 | 425,452 |  |
Total assets | 7,405,083 | 6,978,801 | 7,405,083 | 6,978,801 | $ 7,211,341 | $ 6,958,214
Operating Segments | Uniform Rental and Facility Services |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |
Revenue | 1,390,778 | 1,308,038 | 2,765,716 | 2,619,822 |  |
Income (loss) before income taxes | 242,891 | 203,814 | 474,425 | 422,724 |  |
Total assets | 6,438,400 | 5,899,010 | 6,438,400 | 5,899,010 |  |
Operating Segments | First Aid and Safety Services |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |
Revenue | 153,348 | 139,090 | 306,765 | 279,672 |  |
Income (loss) before income taxes | 21,328 | 17,975 | 43,311 | 37,386 |  |
Total assets | 495,054 | 467,902 | 495,054 | 467,902 |  |
Operating Segments | All Other |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |
Revenue | 174,142 | 159,313 | 343,762 | 318,450 |  |
Income (loss) before income taxes | 11,421 | 13,422 | 23,132 | 24,200 |  |
Total assets | 383,150 | 353,155 | 383,150 | 353,155 |  |
Corporate |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |
Revenue | 0 | 0 | 0 | 0 |  |
Income (loss) before income taxes | 44,884 | (28,838) | 21,076 | (58,858) |  |
Total assets | $ 88,479 | $ 258,734 | $ 88,479 | $ 258,734 |  |

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