Stockholders' Equity (Schedule of Assumptions to Value PSUs Granted) (Details) - Performance Restricted Stock Units [Member] - $ / shares |
9 Months Ended | ||
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Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Expected volatility | 30.70% | 30.90% | 30.20% |
| Risk free interest rate | 3.40% | 4.10% | 4.50% |
| Expected life | 3 years | 3 years | 3 years |
| Grant date fair value | $ 367.56 | $ 196.63 | $ 146.47 |
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Share-based compensation arrangement by share-based payment award, fair value assumptions, fair value. No definition available.
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- Details
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