Restructuring and Impairments - Schedule of Impairment Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Oct. 31, 2018
Restructuring Cost and Reserve [Line Items]
Liability, Defined Benefit Plan, Noncurrent	$ (1,929)		$ (1,929)		$ (2,097)
Asset impairment charges	3	$ 8	6	$ 11
Assets Leased to Others [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 3	$ 1	$ 6	2
long-lived asset [Domain] | North America Truck [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges				6
long-lived asset [Domain] | Financial Services Operations
Restructuring Cost and Reserve [Line Items]
Asset impairment charges				$ 1