Balance Sheet Details - Other Assets (Details) - USD ($) $ in Millions		Jan. 31, 2017	Oct. 31, 2016
Balance Sheet Related Disclosures [Abstract]
Financing receivables, net		$ 3,811	$ 3,938
Deferred tax assets		4,477	4,430
Pension investment fund		965	377
Deferred costs - long-term		826	822
Other		3,525	3,599
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total	[1]	$ 13,604	$ 13,166

[1] During the first quarter of fiscal 2017, the Company adopted ASU 2015-03, which simplifies the presentation of debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability rather than an asset that is amortized. The Company adopted the standard retrospectively for the prior period presented.