Derivative Financial Instruments and Hedging Activities (Cash Flow Hedges) (Details) - Cash flow hedging - Forward contracts - USD ($)	May 31, 2021	Aug. 31, 2020
Derivative [Line Items]
Aggregate notional amount	$ 3,300,000,000	$ 2,900,000,000
Interest rate swaps \| Debt obligation one
Derivative [Line Items]
Aggregate notional amount	250,000,000.0
Interest rate swaps \| Debt obligation two
Derivative [Line Items]
Aggregate notional amount	$ 150,000,000.0

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant