Debt - Financial Services Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Oct. 31, 2013
Debt Instrument [Line Items]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	$ 30
Debt, Current	1,020	1,163
Long-term Debt and Capital Lease Obligations	4,184	3,922
Financial Services Operations [Member]
Debt Instrument [Line Items]
Long-term Debt, net	2,063	1,866
Debt, Current	766	505
Long-term Debt and Capital Lease Obligations	1,297	1,361
Financial Services Operations [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, net		778
Financial Services Operations [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Debt, net		1,018
Financial Services Operations [Member] | Commercial Paper [Member]
Debt Instrument [Line Items]
Long-term Debt, net		21
Financial Services Operations [Member] | Borrowings Secured By Operating and Finance Leases [Member]
Debt Instrument [Line Items]
Long-term Debt, net		49
Revolving Credit Facility [Member] | Bank Facility [Member] | Financial Services Operations [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100