Trade Accounts Receivable Securitization and Sale Programs (Securitization Key Terms) (Details 2) $ in Millions	12 Months Ended
	Aug. 31, 2017 USD ($)
North American Asset Backed Securitization Program [Member]
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 200.0	[1]
Trade accounts receivable sale agreement expiration date	Oct. 20, 2017	[2]
Foreign Asset Backed Securitization Program [Member]
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 400.0	[1],[3]
Trade accounts receivable sale agreement expiration date	May 01, 2018

[1] (1) Maximum amount available at any one time.

[2] (3) On October 18 , 2017 , the program was extended to November 17, 2017.

[3] (2) Amended effective February 13, 2017, to increase facility limit from $275.0 million.