Stockholders' Equity (Weighted Average Grant Date Fair Value of Options Granted) (Details) - $ / shares	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value of options	$ 41.78	$ 28.22	$ 25.41

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Balance Type:	na
Period Type:	duration