Financing Obligation (Narrative) (Details) $ in Millions	12 Months Ended
	Aug. 31, 2018 USD ($) item
Financing Obligation [Abstract]
Duration of master lease agreement	20 years
Number of renewal options | item	6
Duration of renewal options	5 years
Maximum duration of lease agreement	50 years
Carrying value of the land sold in the financing transaction | $	$ 1.3