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Balance Sheet Details - Other Liabilities (Details) - USD ($)
$ in Millions
Apr. 30, 2017
Oct. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
Pension, post-retirement and post-employment liabilities $ 1,779 $ 2,101
Deferred revenue - long-term 2,624 2,485
Tax liability - long-term 3,518 3,950
Other long-term liabilities 1,020 865
Total $ 8,941 $ 9,401