Segment Reporting - Summary of Segment Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Segment Reporting Information [Line Items]
External sales and revenues, net									$ 10,250	$ 8,570	$ 8,110
Sales and revenues, net	$ 3,317	$ 2,606	$ 2,422	$ 1,905	$ 2,598	$ 2,213	$ 2,096	$ 1,663	10,250	8,570	8,111
Income (loss) from continuing operations, net of tax	$ 188								340	29	(97)
Income tax expense									(52)	(10)	(33)
Interest expense									327	351	327
Equity in income of non-consolidated affiliates									0	6	6
Capital expenditures									113	102	116
Intersegment sales and revenues									0	0	1
Segment Profit Loss									392	39	(64)
Depreciation, Depletion and Amortization									211	223	225
North America Truck [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net									7,386	5,770	5,271
Sales and revenues, net									7,490	5,809	5,403
Income (loss) from continuing operations, net of tax									397	(6)	(189)
Income tax expense									0	0	0
Interest expense									0	0	0
Equity in income of non-consolidated affiliates									2	4	5
Capital expenditures									99	82	97
Intersegment sales and revenues									104	39	132
Segment Profit Loss									397	(6)	(189)
Depreciation, Depletion and Amortization									130	137	129
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net									0	10	10
Sales and revenues, net									(264)	(175)	(295)
Income (loss) from continuing operations, net of tax									(716)	(651)	(627)
Income tax expense									(52)	(10)	(33)
Interest expense									235	265	247
Equity in income of non-consolidated affiliates									0	0	0
Capital expenditures									8	12	11
Intersegment sales and revenues									(264)	(185)	(305)
Segment Profit Loss									(664)	(641)	(594)
Depreciation, Depletion and Amortization									10	11	15
North America Parts [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net									2,399	2,369	2,398
Sales and revenues, net									2,407	2,392	2,427
Income (loss) from continuing operations, net of tax									569	616	640
Income tax expense									0	0	0
Interest expense									0	0	0
Equity in income of non-consolidated affiliates									3	3	4
Capital expenditures									2	2	2
Intersegment sales and revenues									8	23	29
Segment Profit Loss									569	616	640
Depreciation, Depletion and Amortization									6	11	13
Global Operations [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net									305	279	296
Sales and revenues, net									360	309	341
Income (loss) from continuing operations, net of tax									2	(7)	(21)
Income tax expense									0	0	0
Interest expense									0	0	0
Equity in income of non-consolidated affiliates									(5)	(1)	(3)
Capital expenditures									3	5	4
Intersegment sales and revenues									55	30	45
Segment Profit Loss									2	(7)	(21)
Depreciation, Depletion and Amortization									10	13	18
Financial Services Operations
Segment Reporting Information [Line Items]
External sales and revenues, net									160	142	135
Sales and revenues, net									257	235	235
Income (loss) from continuing operations, net of tax									88	77	100
Income tax expense									0	0	0
Interest expense									92	86	80
Equity in income of non-consolidated affiliates									0	0	0
Capital expenditures									1	1	2
Investment Income, Interest									182	165	167
Intersegment sales and revenues									97	93	100
Segment Profit Loss									88	77	100
Depreciation, Depletion and Amortization									55	51	50
Truck
Segment Reporting Information [Line Items]
Sales and revenues, net									7,323	5,706	5,176
Parts
Segment Reporting Information [Line Items]
Sales and revenues, net									2,215	2,177	2,216
Engine
Segment Reporting Information [Line Items]
Sales and revenues, net									552	545	583
Financial Services Operations
Segment Reporting Information [Line Items]
Sales and revenues, net									$ 160	$ 142	$ 136