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Common Stock and Related Matters | 12 Months Ended
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Aug. 31, 2021
Equity [Abstract] |
Common Stock and Related Matters | Common Stock and Related Matters Common Stock Changes in common stock during the periods presented were as follows (amounts and shares in millions):
| Common Stock
| Shares |  | Amount
|  |  | (At par)
Balance at August 31, 2018 | 53.7 |  |  | $ | 0.5 |
Issuance of restricted stock grants, net of cancellations | 0.1 |  |  | — |
Balance at August 31, 2019 | 53.8 |  |  | 0.5 |
Issuance of restricted stock grants, net of cancellations | 0.1 |  |  | — |
Stock options exercised | — |  | * | — |
Balance at August 31, 2020 | 53.9 |  |  | 0.5 |
Issuance of restricted stock grants, net of cancellations | 0.1 |  |  | — |
Stock options exercised | — |  | * | — |
Balance at August 31, 2021 | 54.0 |  |  | $ | 0.5 |
___________________________ * Represents shares of less than 0.1 million. As of August 31, 2021 and 2020, we had 18.8 million and 15.0 million of repurchased shares recorded as treasury stock at an original repurchase cost of $1.66 billion and $1.23 billion, respectively. During fiscal 2021, we repurchased 3.8 million shares of our outstanding common stock. As of August 31, 2021, the maximum number of shares that may yet be repurchased under the share repurchase program authorized by the Board equaled 3.8 million shares. We expect to repurchase shares on an opportunistic basis subject to various factors including stock price, Company performance, market conditions, and other possible capital allocation priorities. Preferred Stock We have 50 million shares of preferred stock authorized. No shares of preferred stock were issued in fiscal 2021 or 2020, and no shares of preferred stock are outstanding. Earnings per Share Basic earnings per share for the periods presented is computed by dividing net earnings available to common stockholders by the weighted average number of common shares outstanding for these periods. Diluted earnings per share is computed similarly but reflects the potential dilution that would occur if dilutive options were exercised, unvested share-based payment awards were vested, and other distributions related to deferred stock agreements were incurred. The dilutive effects of share-based payment awards subject to market and/or performance conditions that were not met during the period are excluded from the computation of diluted earnings per share. The following table calculates basic earnings per common share and diluted earnings per common share during the periods presented (in millions, except per share data):
| Year Ended August 31,
| 2021 |  | 2020 |  | 2019
Net income | $ | 306.3 |  |  | $ | 248.3 |  |  | $ | 330.4 |
Basic weighted average shares outstanding | 36.3 |  |  | 39.5 |  |  | 39.7 |
Common stock equivalents | 0.3 |  |  | 0.1 |  |  | 0.1 |
Diluted weighted average shares outstanding | 36.6 |  |  | 39.6 |  |  | 39.8 |
Basic earnings per share | $ | 8.44 |  |  | $ | 6.29 |  |  | $ | 8.32 |
Diluted earnings per share | $ | 8.38 |  |  | $ | 6.27 |  |  | $ | 8.29 |
The following table presents stock options, restricted stock awards, and performance stock units that were excluded from the diluted earnings per share calculation for the periods presented as the effect of inclusion would have been antidilutive (in millions):
| Year Ended August 31,
| 2021 |  | 2020 |  | 2019
Stock options | 0.8 |  |  | 0.6 |  |  | 0.3 |
Restricted stock awards | — |  | * | 0.2 |  |  | 0.2 |
Performance stock units | — |  |  | — |  | * | — |
_______________________ * Represents shares of less than 0.1 million.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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