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Accounting for Leases as a Lessee - Future Minimum Lease Commitments (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 31, 2020
Operating Leases    
2022 $ 219  
2023 198  
2024 170  
2025 146  
2026 123  
Thereafter 412  
Total future lease payments 1,268  
Less: imputed interest (138)  
Total operating lease liabilities 1,130 $ 1,086
Finance Leases    
2022 6  
2023 7  
2024 7  
2025 7  
2026 7  
Thereafter 27  
Total future lease payments 61  
Less: imputed interest (8)  
Total finance lease liabilities $ 53 $ 58