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Stockholders' Equity (Schedule of Assumptions to Value PSUs Granted ) (Details) - Performance Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	30.90%	30.20%
Risk free interest rate	4.10%	4.50%
Expected life	3 years	3 years
Grant date fair value	$ 196.63	$ 146.47

X

- 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.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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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.

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Share-based compensation arrangement by share-based payment award, fair value assumptions, fair value.

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No definition available.

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