Goodwill and Other Intangible assets, Net Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 2	$ 3	$ 7
Finite-Lived Intangible Assets, Gross	144	150
Finite-Lived Intangible Assets, Accumulated Amortization	(138)	(142)
Finite-Lived Intangible Assets, Net	6	8
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	83	84
Finite-Lived Intangible Assets, Accumulated Amortization	(77)	(76)
Finite-Lived Intangible Assets, Net	6	8
Customer base and relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	61	66
Finite-Lived Intangible Assets, Accumulated Amortization	(61)	(66)
Finite-Lived Intangible Assets, Net	$ 0	$ 0