Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Feb. 28, 2022	Aug. 31, 2021
Operating Leases:
Operating lease right-of-use assets	$ 21,730	$ 21,893
Operating lease obligations - current	2,277	2,259
Operating lease obligations - non-current	21,951	22,153
Total operating lease obligations	24,228	24,412
Finance Leases:
Property, plant and equipment, net	712	725
Lease obligations included in:
Accrued expenses and other liabilities	38	37
Other non-current liabilities	965	974
Total finance lease obligations	$ 1,003	$ 1,010
Finance lease, right-of-use asset, statement of financial position, extensible enumeration	Property, plant and equipment, net	Property, plant and equipment, net
Finance lease, liability, current, statement of financial position, extensible enumeration	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Finance lease, liability, noncurrent, statement of financial position, extensible enumeration	Other non-current liabilities	Other non-current liabilities