Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	May 31, 2021	Aug. 31, 2020
Operating Leases:
Operating lease right-of-use assets	$ 21,874	$ 21,453
Operating lease obligations - current	2,327	2,358
Operating lease obligations - non-current	22,088	21,765
Total operating lease obligations	24,416	24,123
Finance Leases:
Property, plant and equipment, net	741	766
Lease obligations included in:
Accrued expenses and other liabilities	37	31
Other non-current liabilities	989	1,013
Total finance lease obligations	$ 1,025	$ 1,044
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