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EMPLOYEES' RETIREMENT PLANS (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
BRP plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation liability	$ 49.3	$ 73.1
Current value of segregated assets	56.2	75.7
Net holding gain on segregated assets	9.3	7.5	$ 5.4
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Compensation expense under defined contribution profit sharing and savings plan and BRP Plan	27.3	28.3	$ 25.0
Other Long-term Liabilities | BRP plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation liability	42.8	50.1
Accrued Expenses and Other Payables | BRP plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation liability	$ 6.5	$ 23.0

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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Amount of cost for defined contribution plan.

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