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Stockholders' Equity (Changes in Nonvested Stock Options) (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	2,094	1,724
Weighted-Average Exercise Price Per Share, beginning balance	$ 41.54	$ 40.54
Options granted, Number of options	0	1,055
Options granted, Weighted-Average Exercise Price Per Share		$ 40.26
Options vested, Number of options	(6)	(680)
Options vested, Weighted-Average Exercise Price Per Share	$ 41.74	$ 36.97
Options forfeited, Number of options	(2)	(13)
Options forfeited, Weighted-Average Exercise Price Per Share	$ 40.26	$ 43.00
Number of Options, ending balance	2,086	2,086
Weighted-Average Exercise Price Per Share, ending balance	$ 41.54	$ 41.54

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Number of non-vested options outstanding.

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