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Stockholders' Equity (Summary of Activity for Stock Option Awards) (Details) - Stock Options [Member] shares in Thousands	12 Months Ended
	Sep. 30, 2020 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options, beginning balance | shares	5,387
Options granted, Number of options | shares	912
Options exercised, Number of options | shares	(756)
Options forfeited, Number of options | shares	(94)
Options expired, Number of options | shares	(6)
Number of options, ending balance | shares	5,443
Weighted Average Exercise Price Per Share, beginning balance | $ / shares	$ 53.73
Options granted, Weighted Average Exercise Price Per Share | $ / shares	90.52
Options exercised, Weighted Average Exercise Price Per Share | $ / shares	33.26
Options forfeited, Weighted Average Exercise Price Per Share | $ / shares	95.55
Options expired, Weighted Average Exercise Price Per Share | $ / shares	72.79
Weighted Average Exercise Price Per Share, ending balance | $ / shares	$ 62.00

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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