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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
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Feb. 28, 2014
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Feb. 28, 2013
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Feb. 28, 2014
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Feb. 28, 2013
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Aug. 31, 2013
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| Income Tax Disclosure [Abstract] | |||||
| Effective income tax rate | 29.00% | 15.70% | 17.60% | 16.00% | |
| Discrete item, changes in foreign statutory tax rates | $ 0.7 | ||||
| Discrete item, change in tax law and reinstatement of US Federal research and development tax credit | 1.2 | ||||
| Reversal of tax reserves | 2.4 | ||||
| Gross liability for unrecognized tax benefits, excluding interest and penalties | 19.2 | 19.2 | 18.0 | ||
| Liabilities for payment of interest and penalties related to its unrecognized tax benefits | $ 3.4 | $ 3.4 | $ 2.9 | ||
| X | ||||||||||
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- Definition
Discrete item, change in tax law and reinstatement of US Federal research and development tax credit No definition available.
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| X | ||||||||||
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- Definition
Discrete item, changes in foreign statutory tax rates No definition available.
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| X | ||||||||||
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- Definition
Reversal of tax reserves No definition available.
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| X | ||||||||||
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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