Segment Reporting - Summary of Segment Long Lived Assets and Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net	$ 2,086	$ 2,538	$ 6,048	$ 7,652
Financial Services Operations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Investment Income, Interest	43	46	127	135
Sales and revenues, net	$ 60	$ 63	$ 177	$ 183