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Basis of Presentation - Schedule of Impact of Adopting New Revenue Guidance Balance Sheet (Details) - USD ($) $ in Thousands | Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2018 | Jun. 01, 2018 | May 31, 2018 | Feb. 28, 2018 | Nov. 30, 2017 | Aug. 31, 2017 | May 31, 2017
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
ASSETS |  |  |  |  |  |  |  |  |
Accounts receivable, net | $ 878,037 |  |  | $ 818,009 | $ 804,583 |  |  |  |
Inventories, net | 339,805 |  |  | 269,082 | 280,347 |  |  |  |
Income taxes, current | 42,552 |  |  |  | 19,634 |  |  |  |
Prepaid expenses and other current assets | 108,969 |  |  | 95,846 | 32,383 |  |  |  |
Total current assets | 2,223,756 |  |  | 2,043,556 | 1,977,932 |  |  |  |
Other assets, net | 237,851 |  |  | 216,818 | 29,315 |  |  |  |
Total assets | 7,433,673 |  |  | 7,211,341 | 6,958,214 | $ 6,928,593 |  |  |
Long-term liabilities: |  |  |  |  |  |  |  |  |
Deferred income taxes | 439,011 |  |  | 416,516 | 352,581 |  |  |  |
Total long-term liabilities | 3,259,830 |  |  | 3,229,766 | 3,165,831 |  |  |  |
Retained earnings | 6,465,121 |  |  | 6,027,019 | 5,837,827 |  |  |  |
Total shareholders’ equity | 3,179,492 | $ 3,027,244 | $ 3,345,968 | 3,205,718 | 3,016,526 | $ 2,893,997 | $ 2,553,033 | $ 2,565,881 | $ 2,302,793
Total liabilities and shareholders' equity | 7,433,673 |  |  | $ 7,211,341 | $ 6,958,214 |  |  |  |
Under Historical Guidance |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
Accounts receivable, net | 861,725 |  |  |  |  |  |  |  |
Inventories, net | 352,714 |  |  |  |  |  |  |  |
Income taxes, current | 42,855 |  |  |  |  |  |  |  |
Prepaid expenses and other current assets | 40,616 |  |  |  |  |  |  |  |
Total current assets | 2,152,303 |  |  |  |  |  |  |  |
Other assets, net | 37,756 |  |  |  |  |  |  |  |
Total assets | 7,162,125 |  |  |  |  |  |  |  |
Long-term liabilities: |  |  |  |  |  |  |  |  |
Deferred income taxes | 370,811 |  |  |  |  |  |  |  |
Total long-term liabilities | 3,191,630 |  |  |  |  |  |  |  |
Retained earnings | 6,261,773 |  |  |  |  |  |  |  |
Total shareholders’ equity | 2,976,144 |  |  |  |  |  |  |  |
Total liabilities and shareholders' equity | 7,162,125 |  |  |  |  |  |  |  |
Accounting Standards Update 2014-09 | Impact of Adopting ASU 2014-09 |  |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |  |
Accounts receivable, net | 16,312 |  |  |  |  |  |  |  |
Inventories, net | (12,909) |  |  |  |  |  |  |  |
Income taxes, current | (303) |  |  |  |  |  |  |  |
Prepaid expenses and other current assets | 68,353 |  |  |  |  |  |  |  |
Total current assets | 71,453 |  |  |  |  |  |  |  |
Other assets, net | 200,095 |  |  |  |  |  |  |  |
Total assets | 271,548 |  |  |  |  |  |  |  |
Long-term liabilities: |  |  |  |  |  |  |  |  |
Deferred income taxes | 68,200 |  |  |  |  |  |  |  |
Total long-term liabilities | 68,200 |  |  |  |  |  |  |  |
Retained earnings | 203,348 |  |  |  |  |  |  |  |
Total shareholders’ equity | 203,348 |  |  |  |  |  |  |  |
Total liabilities and shareholders' equity | $ 271,548 |  |  |  |  |  |  |  |

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