Trade Accounts Receivable Securitization and Sale Programs (Sales Programs Key Terms) (Details 4) - 12 months ended Aug. 31, 2017 ¥ in Millions, $ in Millions		CNY (¥)	USD ($)
756.5 Million Dollar Trade Accounts Receivable Sale Program
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	[1],[2]		$ 756.5
Trade accounts receivable sale agreement expiration date	[3],[4]	Aug. 22, 2022
150.0 Million Dollar Trade Accounts Receivable Sale Program
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	[1]		150.0
Trade accounts receivable sale agreement expiration date	[4]	Aug. 31, 2018
800.0 Million CNY Trade Accounts Receivable Sale Program
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 | ¥	[1]	¥ 800.0
Trade accounts receivable sale agreement expiration date	[5]	Feb. 15, 2018
100.0 Million Dollar Trade Accounts Receivable Sale Program
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	[1]		100.0
Trade accounts receivable sale agreement expiration date	[3]	Nov. 01, 2018
50.0 Million Dollar Trade Accounts Receivable Sale 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	[1]		$ 50.0
Trade accounts receivable sale agreement expiration date	[6]	Aug. 25, 2018

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

[2] (2) The maximum amount under the program was increased in the fourth quarter of fiscal year 2017 and will be reduced to $650.0 million on February 1, 2018.

[3] (3) Any party may elect to terminate the agreement upon 15 days prior notice.

[4] (4) The program was extended in the fourth quarter of fiscal year 2017.

[5] (5) Program entered into on February 15, 2017.

[6] (6) Program entered into during the fourth quarter of fiscal year 2017.