Stockholders' Equity (Activity for Stock Option Awards) (Details) - $ / shares shares in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2016	Mar. 31, 2016
Stock-Based Compensation
Number of options, beginning balance	5,636	4,641
Weighted Average Exercise Price Per Share, beginning balance	$ 33.81	$ 32.28
Options granted, Number of options	0	1,055
Options granted, Weighted Average Exercise Price Per Share		$ 40.26
Options exercised, Number of options	(205)	(254)
Options exercised, Weighted Average Exercise Price Per Share	$ 22.69	$ 23.29
Options forfeited, Number of options	(2)	(13)
Options forfeited, Weighted Average Exercise Price Per Share	$ 40.26	$ 42.97
Number of options, ending balance	5,429	5,429
Weighted Average Exercise Price Per Share, ending balance	$ 34.22	$ 34.22

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

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

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No definition available.

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- Definition

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

+ References

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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 that were terminated.

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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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Number of share options (or share units) exercised during the current period.

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