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Changes in Stockholders' Equity (Tables) | 9 Months Ended
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May 31, 2019
Equity [Abstract] |
Schedule of Changes in Stockholders' Equity | The following tables summarize changes in the components of stockholders' equity for the three and nine months ended May 31, 2019 and 2018 (in millions):
| Common Stock Outstanding |  |  |  |  |  |  |  |  |  |
| Shares |  | Amount |  | Paid-in Capital |  | Retained Earnings |  | Accumulated Other Comprehensive Loss |  | Treasury Stock, at cost |  | Total
Balance, August 31, 2018 | 40.0 |  |  | $ | 0.5 |  |  | $ | 906.3 |  |  | $ | 1,999.2 |  |  | $ | (114.8 | ) |  | $ | (1,074.4 | ) |  | $ | 1,716.8 |
Net income | — |  |  | — |  |  | — |  |  | 79.6 |  |  | — |  |  | — |  |  | 79.6 |
Other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (6.2 | ) |  | — |  |  | (6.2 | )
ASC 606 adjustments | — |  |  | — |  |  | — |  |  | (13.0 | ) |  | — |  |  | — |  |  | (13.0 | )
Amortization, issuance, and cancellations of restricted stock grants | 0.1 |  |  | — |  |  | 3.8 |  |  | — |  |  | — |  |  | — |  |  | 3.8 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.1 |  |  | — |  |  | — |  |  | — |  |  | 0.1 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.2 | ) |  | — |  |  | — |  |  | (5.2 | )
Repurchases of common stock | (0.2 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (25.0 | ) |  | (25.0 | )
Balance, November 30, 2018 | 39.9 |  |  | 0.5 |  |  | 910.2 |  |  | 2,060.6 |  |  | (121.0 | ) |  | (1,099.4 | ) |  | 1,750.9 |
Net income | — |  |  | — |  |  | — |  |  | 66.3 |  |  | — |  |  | — |  |  | 66.3 |
Other comprehensive income | — |  |  | — |  |  | — |  |  | — |  |  | 6.3 |  |  | — |  |  | 6.3 |
Amortization, issuance, and cancellations of restricted stock grants | — |  |  | — |  |  | 7.1 |  |  | — |  |  | — |  |  | — |  |  | 7.1 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.2 |  |  | — |  |  | — |  |  | — |  |  | 0.2 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.3 | ) |  | — |  |  | — |  |  | (5.3 | )
Repurchases of common stock | (0.2 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (23.7 | ) |  | (23.7 | )
Balance, February 28, 2019 | 39.7 |  |  | 0.5 |  |  | 917.5 |  |  | 2,121.6 |  |  | (114.7 | ) |  | (1,123.1 | ) |  | 1,801.8 |
Net income | — |  |  | — |  |  | — |  |  | 88.4 |  |  | — |  |  | — |  |  | 88.4 |
Other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (7.4 | ) |  | — |  |  | (7.4 | )
Amortization, issuance, and cancellations of restricted stock grants | — |  |  | — |  |  | 7.0 |  |  | — |  |  | — |  |  | — |  |  | 7.0 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.2 |  |  | — |  |  | — |  |  | — |  |  | 0.2 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.1 | ) |  | — |  |  | — |  |  | (5.1 | )
Balance, May 31, 2019 | 39.7 |  |  | $ | 0.5 |  |  | $ | 924.7 |  |  | $ | 2,204.9 |  |  | $ | (122.1 | ) |  | $ | (1,123.1 | ) |  | $ | 1,884.9 |
| Common Stock Outstanding |  |  |  |  |  |  |  |  |  |
| Shares |  | Amount |  | Paid-in Capital |  | Retained Earnings |  | Accumulated Other Comprehensive Loss |  | Treasury Stock, at cost |  | Total
Balance, August 31, 2017 | 41.8 |  |  | $ | 0.5 |  |  | $ | 881.0 |  |  | $ | 1,659.9 |  |  | $ | (99.7 | ) |  | $ | (776.1 | ) |  | $ | 1,665.6 |
Net income | — |  |  | — |  |  | — |  |  | 71.5 |  |  | — |  |  | — |  |  | 71.5 |
Other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (8.9 | ) |  | — |  |  | (8.9 | )
Amortization, issuance, and cancellations of restricted stock grants | 0.1 |  |  | — |  |  | 2.5 |  |  | — |  |  | — |  |  | 0.1 |  |  | 2.6 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.2 |  |  | — |  |  | — |  |  | — |  |  | 0.2 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.5 | ) |  | — |  |  | — |  |  | (5.5 | )
Stock options exercised | — |  |  | — |  |  | 0.6 |  |  | — |  |  | — |  |  | — |  |  | 0.6 |
Balance, November 30, 2017 | 41.9 |  |  | 0.5 |  |  | 884.3 |  |  | 1,725.9 |  |  | (108.6 | ) |  | (776.0 | ) |  | 1,726.1 |
Net income | — |  |  | — |  |  | — |  |  | 96.9 |  |  | — |  |  | — |  |  | 96.9 |
Other comprehensive income | — |  |  | — |  |  | — |  |  | — |  |  | 4.3 |  |  | — |  |  | 4.3 |
Reclassification of stranded tax effects of the TCJA (1) | — |  |  | — |  |  | — |  |  | 11.1 |  |  | (11.1 | ) |  | — |  |  | — |
Amortization, issuance, and cancellations of restricted stock grants | 0.1 |  |  | — |  |  | 7.6 |  |  | — |  |  | — |  |  | — |  |  | 7.6 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.1 |  |  | — |  |  | — |  |  | — |  |  | 0.1 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.4 | ) |  | — |  |  | — |  |  | (5.4 | )
Stock options exercised | — |  |  | — |  |  | 0.5 |  |  | — |  |  | — |  |  | — |  |  | 0.5 |
Repurchases of common stock | (1.2 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (194.3 | ) |  | (194.3 | )
Balance, February 28, 2018 | 40.8 |  |  | 0.5 |  |  | 892.5 |  |  | 1,828.5 |  |  | (115.4 | ) |  | (970.3 | ) |  | 1,635.8 |
Net income | — |  |  | — |  |  | — |  |  | 73.0 |  |  | — |  |  | — |  |  | 73.0 |
Other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (5.7 | ) |  | — |  |  | (5.7 | )
Amortization, issuance, and cancellations of restricted stock grants | — |  |  | — |  |  | 6.5 |  |  | — |  |  | — |  |  | — |  |  | 6.5 |
Employee stock purchase plan issuances | — |  |  | — |  |  | 0.2 |  |  | — |  |  | — |  |  | — |  |  | 0.2 |
Cash dividends of $0.13 per share paid on common stock | — |  |  | — |  |  | — |  |  | (5.3 | ) |  | — |  |  | — |  |  | (5.3 | )
Repurchases of common stock | (0.8 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (104.1 | ) |  | (104.1 | )
Balance, May 31, 2018 | 40.0 |  |  | $ | 0.5 |  |  | $ | 899.2 |  |  | $ | 1,896.2 |  |  | $ | (121.1 | ) |  | $ | (1,074.4 | ) |  | $ | 1,600.4 |
______________________________________ (1) See Income Taxes footnote of the Notes to Consolidated Financial Statements within our Form 10-K for additional details.

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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