Leases - Future Lease Payments for Operating and Finance Leases (Details) $ in Millions	Nov. 30, 2019 USD ($)
Finance lease
2020 (Remaining period)	$ 72
2021	94
2022	93
2023	92
2024	89
2025	87
Later	1,170
Total undiscounted minimum lease payments	1,697
Less: Present value discount	(677)
Lease liability	1,020
Operating lease
2020 (Remaining period)	2,597
2021	3,357
2022	3,165
2023	2,984
2024	2,807
2025	2,611
Later	14,092
Total undiscounted minimum lease payments	31,615
Less: Present value discount	(7,433)
Operating lease liability	$ 24,182