Segment Reporting - Summary of Segment Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Segment Reporting Information [Line Items]
External sales and revenues, net	$ 1,925	$ 2,996	$ 3,763	$ 5,429
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(38)	(48)	(74)	(37)
Income Tax Expense (Benefit)	(7)	1	(2)	20
Interest expense	63	82	128	167
Equity in income (loss) of non-consolidated affiliates	(1)	3	(2)	3
Capital expenditures	31	22	90	66
Intersegment sales and revenues	0	0	0	0
Segment Reporting, Segment Revenue	1,925	2,996	3,763	5,429
Segment Profit Loss	(31)	(49)	(72)	(57)
Depreciation, Depletion and Amortization	49	49	99	97
North America Truck [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net	1,385	2,287	2,623	4,063
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(51)	(74)	(109)	16
Income Tax Expense (Benefit)	0	0	0	0
Interest expense	0	0	0	0
Equity in income (loss) of non-consolidated affiliates	(2)	2	(3)	3
Capital expenditures	28	21	75	52
Intersegment sales and revenues	4	9	8	30
Segment Reporting, Segment Revenue	1,389	2,296	2,631	4,093
Segment Profit Loss	(51)	(74)	(109)	16
Depreciation, Depletion and Amortization	29	26	56	52
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net	1	3	2	6
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(101)	(153)	(215)	(413)
Income Tax Expense (Benefit)	7	(1)	2	(20)
Interest expense	43	55	89	111
Equity in income (loss) of non-consolidated affiliates	0	1	0	0
Capital expenditures	2	1	8	10
Intersegment sales and revenues	(23)	(47)	(46)	(109)
Segment Reporting, Segment Revenue	(22)	(44)	(44)	(103)
Segment Profit Loss	(94)	(154)	(213)	(433)
Depreciation, Depletion and Amortization	1	3	3	6
North America Parts [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net	442	578	934	1,124
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	103	144	222	288
Income Tax Expense (Benefit)	0	0	0	0
Interest expense	0	0	0	0
Equity in income (loss) of non-consolidated affiliates	1	0	1	1
Capital expenditures	0	(1)	5	1
Intersegment sales and revenues	1	1	2	3
Segment Reporting, Segment Revenue	443	579	936	1,127
Segment Profit Loss	103	144	222	288
Depreciation, Depletion and Amortization	2	2	4	3
Global Operations [Member]
Segment Reporting Information [Line Items]
External sales and revenues, net	47	80	108	141
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(13)	3	(13)	9
Income Tax Expense (Benefit)	0	0	0	0
Interest expense	0	0	0	0
Equity in income (loss) of non-consolidated affiliates	0	0	0	(1)
Capital expenditures	1	0	2	1
Intersegment sales and revenues	4	7	11	19
Segment Reporting, Segment Revenue	51	87	119	160
Segment Profit Loss	(13)	3	(13)	9
Depreciation, Depletion and Amortization	2	2	4	4
Financial Services Operations
Segment Reporting Information [Line Items]
External sales and revenues, net	50	48	96	95
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	24	32	41	63
Income Tax Expense (Benefit)	0	0	0	0
Interest expense	20	27	39	56
Equity in income (loss) of non-consolidated affiliates	0	0	0	0
Capital expenditures	0	1	0	2
Intersegment sales and revenues	14	30	25	57
Segment Reporting, Segment Revenue	64	78	121	152
Segment Profit Loss	24	32	41	63
Depreciation, Depletion and Amortization	15	16	32	32
Interest Revenue (Expense), Net	$ 40	$ 55	$ 75	$ 108