Trade Accounts Receivable Securitization and Sale Programs (Sales Programs Key Terms) (Details)	12 Months Ended
	Aug. 31, 2018 CNY (¥) uncommitted_trade_accounts_receivable_sale_program	Feb. 01, 2019 USD ($)	Aug. 31, 2018 USD ($) uncommitted_trade_accounts_receivable_sale_program
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Number of uncommitted trade accounts receivable sale programs | uncommitted_trade_accounts_receivable_sale_program	9		9
A
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			$ 875,000,000
Notice period to cancel receivable sale agreements	15 days
A | Scenario, Forecast
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount		$ 650,000,000
B
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			150,000,000
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	10 days
C
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount | ¥	¥ 800,000,000
D
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			100,000,000
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days
E
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			50,000,000
F
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			150,000,000
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days
G
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			50,000,000
Notice period to cancel receivable sale agreements	15 days
H
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			100,000,000
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days
I
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount			$ 100,000,000
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days