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Note 6 - Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015	Mar. 01, 2014
Compensation and Retirement Disclosure [Abstract]
Defined Contribution Plan, Cost Recognized	$ 3.8	$ 4.1	$ 7.9	$ 8.2
Pension Expense	$ 0.9us-gaap_PensionExpense	$ 0.6us-gaap_PensionExpense	$ 1.7us-gaap_PensionExpense	$ 1.2us-gaap_PensionExpense

The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period.

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