Goodwill and Other Intangible assets, Net Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 3	$ 7	$ 12
Finite-Lived Intangible Assets, Gross	150	152
Finite-Lived Intangible Assets, Accumulated Amortization	(142)	(140)
Finite-Lived Intangible Assets, Net	8	12
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	84	84
Finite-Lived Intangible Assets, Accumulated Amortization	(76)	(74)
Finite-Lived Intangible Assets, Net	8	10
Customer base and relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	66	68
Finite-Lived Intangible Assets, Accumulated Amortization	(66)	(66)
Finite-Lived Intangible Assets, Net	$ 0	$ 2