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Stockholders' Equity (Summary of Activity for Stock Option Awards) (Details) - Stock Options [Member] - $ / shares shares in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Number of options, beginning balance | 5,517 | 5,443
Options granted, Number of options |  | 773
Options exercised, Number of options | (91) | (787)
Options forfeited, Number of options | (19) | (22)
Number of options, ending balance | 5,407 | 5,407
Weighted Average Exercise Price Per Share, beginning balance | $ 67.50 | $ 62.00
Options granted, Weighted Average Exercise Price Per Share |  | 82.46
Options exercised, Weighted Average Exercise Price Per Share | 41.21 | 40.96
Options forfeited, Weighted Average Exercise Price Per Share | 78.92 | 80.34
Weighted Average Exercise Price Per Share, ending balance | $ 67.91 | $ 67.91

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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