Balance Sheet Details - Other Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2017	Oct. 31, 2016
Balance Sheet Related Disclosures [Abstract]
Pension, post-retirement and post-employment liabilities	$ 2,352	$ 4,230
Deferred revenue - long-term	3,450	3,408
Deferred tax liability - long-term	140	143
Tax liability - long-term	3,910	4,057
Other long-term liabilities	1,280	1,184
Total	11,132	$ 13,022
Non-U.S. Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions to benefit plans	$ 1,943