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Guarantees, Indemnifications and Warranties (Details 2) - USD ($)
$ in Millions
Oct. 31, 2019
Oct. 31, 2018
Tax Indemnification    
Other Commitments [Line Items]    
Indemnification receivable - long-term $ 202 $ 16
Net indemnification receivable - short-term(2) 63 17
Net indemnification payable - long-term 9 9
Net indemnification payable - short-term(2) 0 26
Cross-Indemnifications    
Other Commitments [Line Items]    
Receivable 85 104
Payable $ 55 $ 83