Summary of Significant Accounting Policies - Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2014	Oct. 31, 2013
Variable Interest Entity Primary Beneficiary Blue Diamond Parts And Blue Diamond Truck [Member]
Variable Interest Entity [Line Items]
Liabilities	$ 186	$ 188
Variable Interest Entity, Consolidated, Carrying Amount, Assets	201	323
Cash and cash equivalents	65	56
Variable Interest Entity Primary Beneficiary Securitizations Treated As Borrowings [Member] | Financial Services Operations [Member]
Variable Interest Entity [Line Items]
Liabilities	752	778
Variable Interest Entity, Consolidated, Carrying Amount, Assets	946	989
Transaction Does Not Qualify for Sale Accounting [Member] | Financial Services Operations [Member]
Variable Interest Entity [Line Items]
Liabilities	58	49
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 73	$ 61