Summary of Significant Accounting Policies - Variable Interest Entities (Details) - USD ($) $ in Millions	May 28, 2015	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Variable Interest Entity [Line Items]
Cash and cash equivalents		$ 706	$ 804	$ 912	$ 497
Variable Interest Entity Primary Beneficiary, Blue Diamond Parts [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		49	51
Cash and cash equivalents		10	6
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities		13	16
Variable Interest Entity Primary Beneficiary, Blue Diamond Trucks [Member]
Variable Interest Entity [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	25.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	$ 27
Variable Interest Entity Primary Beneficiary Securitizations Treated As Borrowings [Member] | Financial Services Operations
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		900	900
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities		754	722
Transaction Does Not Qualify for Sale Accounting [Member] | Financial Services Operations
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		278	249
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities		$ 194	$ 136