Segment Reporting - Summary of Segment Long Lived Assets and Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net	$ 1,765	$ 2,421
Financial Services Operations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Investment Income, Interest	42	45
Sales and revenues, net	$ 59	$ 60