Basis Of Presentation (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Nov. 30, 2017 country item	Aug. 31, 2018 USD ($)
Business Acquisition [Line Items]
Number of areas of expertise | item	7
Number of important distinguishing characteristics from competitors | item	3
Number of countries in which entity operates | country	150
Scenario, Forecast [Member]
Business Acquisition [Line Items]
Federal statutory income tax rate		26.00%
Minimum [Member] | Scenario, Forecast [Member]
Business Acquisition [Line Items]
Tax benefit from change in tax law | $		$ 1.2
Maximum [Member] | Scenario, Forecast [Member]
Business Acquisition [Line Items]
Tax benefit from change in tax law | $		$ 1.5