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Capital Stock | 12 Months Ended
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Sep. 30, 2020
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] |
Stockholders' Equity Note Disclosure | Capital Stock Common stock share activity is presented below.
Shares outstanding at September 30, 2017 | 158,590,383 |
Vesting of restricted stock units, net of shares withheld for taxes | 232,875 |
Exercise of stock options | 851,628 |
Exercise of employee stock purchase plan instruments | 150,669 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 86,516 |
Stock repurchased under buyback program | (2,573,475) |
Other | (6,475) |
Shares outstanding at September 30, 2018 | 157,332,121 |
Vesting of restricted stock units, net of shares withheld for taxes | 200,431 |
Exercise of stock options | 726,636 |
Exercise of employee stock purchase plan instruments | 167,806 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 109,380 |
Stock repurchased under buyback program | (1,074,234) |
Shares outstanding at September 30, 2019 | 157,462,140 |
Vesting of restricted stock units, net of shares withheld for taxes | 242,112 |
Exercise of stock options | 534,291 |
Exercise of employee stock purchase plan instruments | 182,971 |
Settlement of performance-based restricted stock units, net of shares withheld for taxes | 61,610 |
Stock repurchased under buyback program | (418,374) |
Shares outstanding at September 30, 2020 | 158,064,750 |

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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 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 Reference 2: 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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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