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Balance Sheet Details - Other Assets (Details) - USD ($)
$ in Millions
Apr. 30, 2017
Oct. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Financing receivables, net $ 3,953 $ 4,584
Deferred tax assets 3,491 3,830
Prepaid pension assets 577 365
Other 2,826 2,796
Total $ 10,847 $ 11,575