Income Taxes (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Income Tax Disclosure [Abstract]
Undistributed earnings of foreign subsidiaries	$ 1,900.0
Unrecognized deferred tax liability	200.0
Accrued interest and penalties related to unrecognized tax benefits included in income tax provision	18.9	$ 20.4
Recognized (derecognized) tax benefit, accrued interest and penalties	(1.5)	$ (6.7)	$ 5.2
Possible adjustments for transfer pricing and certain inclusions in taxable income	$ 5.8

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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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.

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Amount of expense 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.

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