Leases - Other Supplemental Information (Details) - USD ($) $ in Millions	9 Months Ended
	May 31, 2022	May 31, 2021
Cash paid for amounts included in the measurement of lease obligations:
Operating cash outflows from operating leases	$ 2,515	$ 2,562
Operating cash outflows from finance leases	35	36
Financing cash outflows from finance leases	32	31
Total	2,582	2,629
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	1,380	2,011
Finance leases	11	0
Total	$ 1,391	$ 2,011