Trade Accounts Receivable Sale Programs (Trade Accounts Receivable Sale Programs Key Terms) (Details) - 6 months ended Feb. 29, 2020	USD ($)	CNY (¥)
A
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 500,000,000.0
Notice period to cancel receivable sale agreements	30 days
B
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 150,000,000.0
Notice period to cancel receivable sale agreements	10 days
Automatic extension period	1 year
C
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount | ¥		¥ 800,000,000.0
D
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 150,000,000.0
Notice period to cancel receivable sale agreements	30 days
E
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 50,000,000.0
F
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 150,000,000.0
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	$ 50,000,000.0
Notice period to cancel receivable sale agreements	15 days
H
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 100,000,000.0
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	$ 100,000,000.0
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days
J
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 650,000,000.0
Notice period to cancel receivable sale agreements	30 days
K
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 110,000,000.0
Threshold period to cancel trade accounts receivable sale agreement before automatic extension	30 days
L
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum Amount	$ 100,000,000.0