Leases (Summary of Income and Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Leases [Abstract]
Operating lease cost	$ 119	$ 114
Finance lease cost
Amortization of leased assets	27	6
Interest on lease liabilities	5	5
Other	27	15
Net lease cost	$ 178	$ 140