Leases - Other Supplemental Information (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 30, 2022	Nov. 30, 2021
Cash paid for amounts included in the measurement of lease obligations
Operating cash flows from operating leases	$ 828	$ 846
Operating cash flows from finance leases	11	12
Financing cash flows from finance leases	10	11
Total	849	869
Right-of-use assets obtained in exchange for new lease obligations
Operating leases	602	544
Finance leases	1	5
Total	$ 603	$ 549