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Special Charge (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Restructuring Cost and Reserve [Line Items]
Special charge	$ 1.0	$ 0.2
Restructuring Reserve [Roll Forward]
Balance, beginning of period	10.1
Severance costs	(0.5)
Payments made during the period	(2.8)
Balance, end of period	6.8
Fiscal 2018 Actions
Restructuring Reserve [Roll Forward]
Balance, beginning of period	9.2
Severance costs	(0.3)
Payments made during the period	(2.4)
Balance, end of period	6.5
Fiscal 2017 Actions
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0.9
Severance costs	(0.2)
Payments made during the period	(0.4)
Balance, end of period	0.3
Severance and employee-related costs
Restructuring Cost and Reserve [Line Items]
Special charge	(0.5)	0.2
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Special charge	$ 1.5	$ 0.0

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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