Leases - Future Lease Payments for Operating and Finance Leases (Details) - USD ($) $ in Millions	Nov. 30, 2021	Aug. 31, 2021
Finance lease
2022 (Remaining period)	$ 67
2023	88
2024	88
2025	87
2026	87
2027	86
Later	1,054
Total undiscounted minimum lease payments	1,556
Less: Present value discount	(556)
Lease liability	1,000	$ 1,010
Operating lease
2022 (Remaining period)	2,608
2023	3,376
2024	3,260
2025	3,145
2026	3,032
2027	2,924
Later	12,801
Total undiscounted minimum lease payments	31,146
Less: Present value discount	(6,777)
Lease liability	$ 24,369	$ 24,412