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Borrowings (Future Principal Payments) (Details) - USD ($)
$ in Millions
Jul. 31, 2022
Oct. 31, 2021
Debt Disclosure [Abstract]    
2022 (Remainder) $ 9  
2023 403  
2024 1,563  
2025 495  
2026 1,652  
Thereafter 37,105  
Long-term Debt, Gross $ 41,227 $ 41,499