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v3.19.2

Stock-Based Compensation and Shares Repurchases - Common Stock Shares Outstanding (Details) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2019 | May 31, 2018 | May 31, 2019 | May 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance (in shares) |  |  | 164,588,172 |
Ending Balance (in shares) | 152,926,887 |  | 152,926,887 |
Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance (in shares) | 152,878,329 | 172,063,230 | 164,588,172 | 177,727,653
Shares issued upon exercise of stock options (in shares) | 0 | 0 | 11,348 | 29,688
Shares issued under employee stock purchase plan (in shares) | (215) | 261 | 692,110 | 575,777
Vesting of restricted stock (in shares) | 73,095 | 24,232 | 1,979,022 | 2,718,379
Purchases of treasury stock under employee stock plans (in shares) | (24,322) | (6,567) | (489,158) | (790,598)
Treasury shares purchased (in shares) | 0 | (3,281,412) | (13,854,607) | (11,461,155)
Ending Balance (in shares) | 152,926,887 | 168,799,744 | 152,926,887 | 168,799,744

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