Leases - Future Lease Payments for Operating and Finance Leases (Details) - USD ($) $ in Millions	May 31, 2022	Aug. 31, 2021
Finance lease
2022 (Remaining period)	$ 22
2023	88
2024	88
2025	87
2026	87
2027	87
Later	1,052
Total undiscounted minimum lease payments	1,510
Less: Present value discount	(554)
Lease liability	956	$ 1,010
Operating lease
2022 (Remaining period)	867
2023	3,399
2024	3,295
2025	3,185
2026	3,081
2027	2,977
Later	13,412
Total undiscounted minimum lease payments	30,216
Less: Present value discount	(6,396)
Lease liability	$ 23,820	$ 24,412