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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Taxes
Effective tax rate (as a percent)	62.90%	9.40%
Federal statutory rate (as a percent)	35.00%
Effective tax rate reconciliation impact of non-deductible research and development expenses	$ 10.3
Valuation allowances adjustments related to non deductible research and development credits	4.9
Discrete expense, net of related valuation allowance	3.5
Undistributed earnings related to foreign subsidiaries	$ 108.9

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible discrete expenses.

+ References

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- Definition

Represents the valuation allowance associated with non-deductible expense research and development.

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- Definition

Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible research and development expense.

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