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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, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, beginning balance | shares	5,611
Weighted Average Exercise Price Per Share, beginning balance | $ / shares	$ 45.42
Options granted, Number of options | shares	924
Options granted, Weighted Average Exercise Price Per Share | $ / shares	$ 79.84
Options exercised, Number of options | shares	(1,102)
Options exercised, Weighted Average Exercise Price Per Share | $ / shares	$ 32.71
Options forfeited, Number of options | shares	(44)
Options forfeited, Weighted Average Exercise Price Per Share | $ / shares	$ 68.51
Options expired, Number of options | shares	(2)
Options expired, Weighted Average Exercise Price Per Share | $ / shares	$ 72.58
Number of options, ending balance | shares	5,387
Weighted Average Exercise Price Per Share, ending balance | $ / shares	$ 53.73

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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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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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