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Accounting for Leases as a Lessor - Finance Lease Receivable Maturity (Details)
$ in Millions
Jan. 31, 2020
USD ($)
Leases [Abstract]  
Remainder of fiscal 2020 $ 3,142
2021 2,728
2022 1,835
2023 922
2024 419
Thereafter 98
Total undiscounted cash flows 9,144
Present value of lease payments (recognized as finance receivables) 8,337
Difference between undiscounted cash flows and discounted cash flows $ 807